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Ford Escape 2020-2022 Service Manual / Chassis / Brake System / Anti-Lock Brake System (ABS) and Stability Control / Diagnosis and Testing - Anti-Lock Brake System (ABS) and Stability Control

Ford Escape: Anti-Lock Brake System (ABS) and Stability Control / Diagnosis and Testing - Anti-Lock Brake System (ABS) and Stability Control

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


Module DTC Description Action
ABS B10DA:51 PATS Target Identifier: Not Programmed GO to Pinpoint Test P
ABS C0001:01 TCS Control Channel 'A' Valve 1: General Electrical Failure GO to Pinpoint Test Y
ABS C0002:01 TCS Control Channel 'A' Valve 2: General Electrical Failure GO to Pinpoint Test Y
ABS C0003:01 TCS Control Channel 'B' Valve 1: General Electrical Failure GO to Pinpoint Test Y
ABS C0004:01 TCS Control Channel 'B' Valve 2: General Electrical Failure GO to Pinpoint Test Y
ABS C0020:11 ABS Pump Motor Control: Circuit Short To Ground GO to Pinpoint Test H
ABS C0020:12 ABS Pump Motor Control: Circuit Short To Battery GO to Pinpoint Test H
ABS C0020:13 ABS Pump Motor Control: Circuit Open GO to Pinpoint Test H
ABS C0020:49 ABS Pump Motor Control: Internal Electronic Failure GO to Pinpoint Test H
ABS C0020:71 ABS Pump Motor Control: Actuator Stuck GO to Pinpoint Test H
ABS C0030:07 Left Front Tone Wheel: Mechanical Failures GO to Pinpoint Test AB
ABS C0031:01 Left Front Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test M
ABS C0031:07 Left Front Wheel Speed Sensor: Mechanical Failures GO to Pinpoint Test AB
ABS C0031:2F Left Front Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
ABS C0031:4A Left Front Wheel Speed Sensor: Incorrect Component Installed GO to Pinpoint Test AL
ABS C0031:64 Left Front Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS C0033:07 Right Front Tone Wheel: Mechanical Failures GO to Pinpoint Test AB
ABS C0034:01 Right Front Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test M
ABS C0034:07 Right Front Wheel Speed Sensor: Mechanical Failures GO to Pinpoint Test AB
ABS C0034:2F Right Front Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
ABS C0034:4A Right Front Wheel Speed Sensor: Incorrect Component Installed GO to Pinpoint Test AL
ABS C0034:64 Right Front Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS C0036:07 Left Rear Tone Wheel: Mechanical Failures GO to Pinpoint Test AB
ABS C0037:01 Left Rear Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test N
ABS C0037:07 Left Rear Wheel Speed Sensor: Mechanical Failures GO to Pinpoint Test AB
ABS C0037:2F Left Rear Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
ABS C0037:4A Left Rear Wheel Speed Sensor: Incorrect Component Installed GO to Pinpoint Test AL
ABS C0037:64 Left Rear Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS C0039:07 Right Rear Tone Wheel: Mechanical Failures GO to Pinpoint Test AB
ABS C003A:01 Right Rear Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test N
ABS C003A:07 Right Rear Wheel Speed Sensor: Mechanical Failures GO to Pinpoint Test AB
ABS C003A:2F Right Rear Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
ABS C003A:4A Right Rear Wheel Speed Sensor: Incorrect Component Installed GO to Pinpoint Test AL
ABS C003A:64 Right Rear Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS C0040:64 Brake Pedal Switch 'A': Signal Plausibility Failure GO to Pinpoint Test AC
ABS C0044:49 Brake Pressure Sensor 'A': Internal Electronic Failure GO to Pinpoint Test AM
ABS C0044:51 Brake Pressure Sensor 'A': Not Programmed GO to Pinpoint Test AM
ABS C0044:64 Brake Pressure Sensor 'A': Signal Plausibility Failure GO to Pinpoint Test AM
ABS C0044:8F Brake Pressure Sensor 'A': Erratic GO to Pinpoint Test AM
ABS C0047:1C Brake Booster Pressure Sensor: Circuit Voltage Out Of Range GO to Pinpoint Test C
ABS C0047:1C Brake Booster Pressure Sensor: Circuit Voltage Out Of Range GO to Pinpoint Test CO
ABS C0047:26 Brake Booster Pressure Sensor: Signal Rate Of Change Below Threshold GO to Pinpoint Test C
ABS C0047:27 Brake Booster Pressure Sensor: Signal Rate Of Change Above Threshold GO to Pinpoint Test C
ABS C0047:31 Brake Booster Pressure Sensor: No Signal GO to Pinpoint Test C
ABS C0047:64 Brake Booster Pressure Sensor: Signal Plausibility Failure GO to Pinpoint Test CO
ABS C0049:01 Brake Fluid Level: General Electrical Failure GO to Pinpoint Test L
ABS C0049:7A Brake Fluid Level: Fluid Leak Or Seal Failure GO to Pinpoint Test L
ABS C0049:7B Brake Fluid Level: Low Fluid Level GO to Pinpoint Test L
ABS C0051:64 Steering Wheel Position Sensor: Signal Plausibility Failure GO to Pinpoint Test LA
ABS C0051:67 Steering Wheel Position Sensor: Signal Incorrect After Event GO to Pinpoint Test LA
ABS C0051:85 Steering Wheel Position Sensor: Signal Above Allowable Range GO to Pinpoint Test LA
ABS C0051:86 Steering Wheel Position Sensor: Signal Invalid GO to Pinpoint Test LA
ABS C0061:28 Lateral Acceleration Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test BH
ABS C0061:54 Lateral Acceleration Sensor: Missing Calibration GO to Pinpoint Test AN
ABS C0061:64 Lateral Acceleration Sensor: Signal Plausibility Failure GO to Pinpoint Test BH
ABS C0062:28 Longitudinal Acceleration Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test BH
ABS C0062:54 Longitudinal Acceleration Sensor: Missing Calibration GO to Pinpoint Test AN
ABS C0062:64 Longitudinal Acceleration Sensor: Signal Plausibility Failure GO to Pinpoint Test BH
ABS C0063:28 Yaw Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test BH
ABS C0063:64 Yaw Rate Sensor: Signal Plausibility Failure GO to Pinpoint Test BH
ABS C0064:28 Roll Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test BH
ABS C0064:64 Roll Rate Sensor: Signal Plausibility Failure GO to Pinpoint Test BH
ABS C006A:95 Multi-axis Acceleration Sensor: Incorrect Assembly GO to Pinpoint Test AN
ABS C006B:00 Stability System Active Too Long: No Sub Type Information GO to Pinpoint Test AD
ABS C0078:56 Tire Diameter: Invalid/Incompatible Configuration GO to Pinpoint Test ZA
ABS C052E:A2 ABS Pump Motor Control Circuit Low: System Voltage Low GO to Pinpoint Test H
ABS C0564:00 ABS Control Module System Voltage Low: No Sub Type Information GO to Pinpoint Test A
ABS C0594:12 Brake Booster Motor 'A' Performance: Circuit Short To Battery GO to Pinpoint Test CP
ABS C0594:78 Brake Booster Motor 'A' Performance: Alignment Or Adjustment Incorrect GO to Pinpoint Test CP
ABS C0594:92 Brake Booster Motor 'A' Performance: Performance Or Incorrect Operation GO to Pinpoint Test CP
ABS C0596:00 Brake Booster Motor 'A' Current Sensor Circuit Range/Performance: No Sub Type Information GO to Pinpoint Test CP
ABS C1013:09 Brake System Pressure: Component Failures GO to Pinpoint Test CO
ABS C1013:7A Brake System Pressure: Fluid Leak Or Seal Failure GO to Pinpoint Test CO
ABS C1013:7C Brake System Pressure: Slow Response GO to Pinpoint Test CO
ABS C1013:92 Brake System Pressure: Performance Or Incorrect Operation GO to Pinpoint Test CO
ABS C1015:7A Vacuum Supply: Fluid Leak Or Seal Failure GO to Pinpoint Test AH
ABS C1015:7B Vacuum Supply: Low Fluid Level GO to Pinpoint Test AH
ABS C1018:61 Regenerative Braking: Signal Calculation Failure GO to Pinpoint Test Z
ABS C1019:29 Linear Actuator Control (LAC): Signal Invalid GO to Pinpoint Test CO
ABS C1019:74 Linear Actuator Control (LAC): Actuator Slipping GO to Pinpoint Test CO
ABS C1019:78 Linear Actuator Control (LAC): Alignment Or Adjustment Incorrect GO to Pinpoint Test CO
ABS C1019:92 Linear Actuator Control (LAC): Performance Or Incorrect Operation GO to Pinpoint Test CO
ABS C101F:46 Generic Valve Failure: Calibration/Parameter Memory Failure GO to Pinpoint Test Z
ABS C101F:49 Generic Valve Failure: Internal Electronic Failure GO to Pinpoint Test Z
ABS C1020:00 Brake System Fill Not Complete: No Sub Type Information GO to Pinpoint Test T
ABS C1020:52 Brake System Fill Not Complete: Not Activated GO to Pinpoint Test T
ABS C1109:64 Vehicle Dynamics Control Switch: Signal Plausibility Failure GO to Pinpoint Test O
ABS C1137:64 Reverse gear switch: Signal Plausibility Failure GO to Pinpoint Test AI
ABS C1A08:1C Pressure Sensor Supply: Circuit Voltage Out Of Range GO to Pinpoint Test AM
ABS C1B11:71 Pressure Control Valve: Actuator Stuck GO to Pinpoint Test Y
ABS P05D3:86 Driver Mode Select Switch 'A' Range/Performance: Signal Invalid GO to Pinpoint Test AA
ABS U0100:00 Lost Communication With ECM/PCM 'A': No Sub Type Information GO to Pinpoint Test AI
ABS U0101:00 Lost Communication with TCM: No Sub Type Information GO to Pinpoint Test AI
ABS U0103:00 Lost Communication With Gear Shift Control Module A: No Sub Type Information GO to Pinpoint Test AV
ABS U011D:00 Lost Communication With All Wheel Drive Control Module: No Sub Type Information GO to Pinpoint Test BX
ABS U0131:00 Lost Communication With Power Steering Control Module 'A': No Sub Type Information GO to Pinpoint Test AE
ABS U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to Pinpoint Test D
ABS U0146:00 Lost Communication With Serial Data Gateway 'A': No Sub Type Information GO to Pinpoint Test BP
ABS U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information GO to Pinpoint Test BH
ABS U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information GO to Pinpoint Test AR
ABS U0164:00 Lost Communication With HVAC Control Module: No Sub Type Information GO to Pinpoint Test CE
ABS U023A:00 Lost Communication With Image Processing Module A: No Sub Type Information GO to Pinpoint Test BQ
ABS U0256:00 Lost Communication With Front Controls Interface Module 'A': No Sub Type Information GO to Pinpoint Test AS
ABS U0300:51 Internal Control Module Software Incompatibility: Not Programmed GO to Pinpoint Test Z
ABS U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information GO to Pinpoint Test AI
ABS U0401:64 Invalid Data Received from ECM/PCM A: Signal Plausibility Failure GO to Pinpoint Test AI
ABS U0401:86 Invalid Data Received from ECM/PCM A: Signal Invalid GO to Pinpoint Test AI
ABS U0402:00 Invalid Data Received from TCM: No Sub Type Information GO to Pinpoint Test AI
ABS U0404:00 Invalid Data Received from Gear Shift Control Module A: No Sub Type Information GO to Pinpoint Test AV
ABS U041E:00 Invalid Data Received From All Wheel Drive Control Module: No Sub Type Information GO to Pinpoint Test BX
ABS U0420:00 Invalid Data Received from Power Steering Control Module 'A': No Sub Type Information GO to Pinpoint Test AE
ABS U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information GO to Pinpoint Test D
ABS U0424:00 Invalid Data Received From HVAC Control Module: No Sub Type Information GO to Pinpoint Test CE
ABS U0424:86 Invalid Data Received From HVAC Control Module: Signal Invalid GO to Pinpoint Test CE
ABS U0452:00 Invalid Data Received From Restraints Control Module: No Sub Type Information GO to Pinpoint Test BH
ABS U0452:86 Invalid Data Received From Restraints Control Module: Signal Invalid GO to Pinpoint Test BH
ABS U053B:00 Invalid Data Received From Image Processing Module A: No Sub Type Information GO to Pinpoint Test BQ
ABS U0557:00 Invalid Data Received From Front Controls Interface Module 'A': No Sub Type Information GO to Pinpoint Test AS
ABS U0594:00 Invalid Data Received From Hybrid/EV Powertrain Control Module 'A': No Sub Type Information GO to Pinpoint Test CM
ABS U2001:00 Reduced System Function: No Sub Type Information GO to Pinpoint Test G
ABS U2017:57 Control Module Software #2: Invalid/Incompatible Software Component GO to Pinpoint Test Z
ABS U2017:93 Control Module Software #2: No Operation GO to Pinpoint Test Z
ABS U2018:57 Control Module Software #3: Invalid/Incompatible Software Component GO to Pinpoint Test Z
ABS U2024:51 Control Module Cal-Config Data: Not Programmed GO to Pinpoint Test Z
ABS U2100:00 Initial Configuration Not Complete: No Sub Type Information GO to Pinpoint Test Z
ABS U2101:00 Control Module Configuration Incompatible: No Sub Type Information GO to Pinpoint Test Z
ABS U2107:00 Collision Mitigation By Braking: No Sub Type Information GO to Pinpoint Test R
ABS U2107:68 Collision Mitigation By Braking: Event Information GO to Pinpoint Test AQ
ABS U2108:68 Adaptive Cruise Control: Event Information GO to Pinpoint Test AQ
ABS U2200:00 Control Module Configuration Memory Corrupt: No Sub Type Information GO to Pinpoint Test Z
ABS U3000:00 Control Module: No Sub Type Information GO to Pinpoint Test Y
ABS U3000:49 Control Module: Internal Electronic Failure GO to Pinpoint Test Y
ABS U3000:4B Control Module: Over Temperature GO to Pinpoint Test Y
ABS U3000:96 Control Module: Component Internal Failure GO to Pinpoint Test Y
ABS U3002:51 Vehicle Identification Number: Not Programmed GO to Pinpoint Test AF
ABS U3002:62 Vehicle Identification Number: Signal Compare Failure GO to Pinpoint Test AF
ABS U3003:16 Battery Voltage: Circuit Voltage Below Threshold GO to Pinpoint Test A
ABS U3003:17 Battery Voltage: Circuit Voltage Above Threshold GO to Pinpoint Test F
ABS U300A:29 Ignition Switch: Signal Invalid GO to Pinpoint Test A
ABS U3012:68 Control Module Improper Wake-up Performance: Event Information GO to Pinpoint Test X

Symptom Charts

Symptom Chart: ABS and Stability Control

  • Diagnostics in this manual assume a certain skill and knowledge of Ford-specific diagnostic practices.
    REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
Condition Actions
ABS false activation, ABS too sensitive, ABS activates on normal stop   GO to Pinpoint Test BF
The hill descent control feature is inoperative - using the hill descent control switch   GO to Pinpoint Test U
The hill descent control feature is inoperative - using the touch screen   GO to Pinpoint Test AS
The hill start assist feature is inoperative   GO to Pinpoint Test E
The selectable drive mode feature is inoperative   GO to Pinpoint Test AA
The traction control system is inoperative, cannot be disabled or enabled   GO to Pinpoint Test O

Pinpoint Tests


PINPOINT TEST A: ABS MODULE LOW VOLTAGE CONCERN
Introduction
Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

If DTC U0140:00 or U0422:00 is present with U300A:29, diagnose the lost communication DTC first.

The ABS module, hydraulic pump and solenoid valves require an operating voltage between 10 and 17 volts. The parking brake system requires an operating voltage of 9 volts or higher. The ABS module receives this voltage from the BJB . The ABS module has 2 ground circuits. Excessive resistance or an open in one or more of these circuits, a discharged battery or a inoperative charging system results in the ABS module setting a DTC .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0564:00 ABS Control Module System Voltage Low: No Sub Type Information Sets if the voltage supplied to the ABS module falls below 5.5 volts.
ABS U3003:16 Battery Voltage: Circuit Voltage Below Threshold Sets when the ABS module detects the voltage supply falls below 10 volts.
ABS U300A:29 Ignition Switch: Signal Invalid Sets when the ABS module detects the voltage signal from the ignition run/start bus from the BJB does not match the voltage message from the BCM .

Possible Sources

  • Fuse(s)
  • Wiring, terminals or connectors
  • Charging system concern
  • 12-volt Battery
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)

Visual Inspection and Pre-checks

  • Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.
  • Make sure the vehicle battery terminals are tightened to their correct torque specifications.
  • Make sure all EBB and ABS module fuses in the BJB BCM are OK.
PINPOINT TEST CE: ABS MODULE COMMUNICATION CONCERN WITH HVAC MODULE
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the HVAC control module sends messages to the GWM over the MS-CAN , The GWM relays these messages to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a HVAC control module failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the HVAC control module, refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0164:00 Lost Communication With HVAC Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any autohold messages from the HVAC module within the allowed time.
ABS U0424:00 Invalid Data Received From HVAC Control Module: No Sub Type Information This DTC sets when the ABS module receives the autohold messages from the HVAC module, but the messages contain invalid data.
ABS U0424:86 Invalid Data Received From HVAC Control Module: Signal Invalid This DTC sets when the ABS module receives the autohold messages from the HVAC module, but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • GWM
  • HVAC control module
PINPOINT TEST C: BRAKE BOOSTER VACUUM SENSOR FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The brake booster vacuum sensor receives a sensor supply voltage of 5 volts from the ABS module. The sensor is also grounded through the ABS module. The sensor uses the pressure differential between the atmosphere and the brake booster vacuum chamber to produce a return voltage signal to the ABS module between 0.2 volt and 4.9 volts. The ABS module uses other sensor inputs such as wheel speed, brake pedal and stability sensors to determine if the vehicle is stopping and at what rate of deceleration. This information is compared against the vacuum pressure sensor to determine the validity of the sensor signal and the working condition of the sensor itself.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0047:1C Brake Booster Pressure Sensor: Circuit Voltage Out Of Range Sets when the ABS module detects the signal returned by the sensor is above or below a predetermined limit. This is usually caused by a short to voltage, an open or an internal failure of the sensor.
ABS C0047:26 Brake Booster Pressure Sensor: Signal Rate Of Change Below Threshold Sets when the ABS module detects the rate of change in the signal transmitted by the vacuum sensor does not match a predetermined threshold, depending on the brake system pressure, or if a characteristic oscillation in the vacuum signal is not detected. A signal failure is reported when 3 valid braking cycles, within the same ignition cycle, have met the above criteria. This is usually caused by a failure in the sensor circuits, a vacuum leak in the brake booster, a mechanical failure of the brake booster or an internal failure of the vacuum sensor.
ABS C0047:27 Brake Booster Pressure Sensor: Signal Rate Of Change Above Threshold Sets when the ABS module detects the rate of change in the signal transmitted by the vacuum sensor increases beyond a predetermined level when the brakes are not being applied. When this condition is detected, the ABS module starts a counter and monitors the rate of change, if the rate of change increases beyond the limit 3 times during this time period, this DTC sets. This is usually caused by a failure in the sensor circuits or an internal failure of the sensor.
ABS C0047:31 Brake Booster Pressure Sensor: No Signal Sets when the ABS module does not receive the sensor data within the allotted time frame. This is usually caused by a failure in the sensor circuits, electromagnetic interference or an internal failure of the sensor.

Possible Sources

  • Wiring, terminals or connectors
  • Brake booster vacuum leak
  • Brake booster vacuum sensor
  • Brake booster
  • ABS module

Visual Inspection and Pre-checks

  • Inspect the brake booster for vacuum leaks.
  • Inspect the brake booster for any obvious signs of damage.
  • Inspect the brake booster vacuum sensor harness and connector of any obvious signs of damage.
  • Make sure the brake booster vacuum sensor electrical connector is free from any corrosion or other contaminants.
PINPOINT TEST D: ABS MODULE COMMUNICATION CONCERN WITH BCM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the BCM sends messages to the GWM over the HS-CAN1 . The GWM relays these message to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a BCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the BCM , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0140:00 Lost Communication With Body Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the BCM within the allowed time.
ABS U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information This DTC sets when the ABS module receives messages from the BCM , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • GWM
  • BCM
PINPOINT TEST E: THE HILL START ASSIST FEATURE IS INOPERATIVE

Normal Operation and Fault Conditions

REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

Possible Sources

  • Network communication concern
  • IPC concern
  • PCM concern
  • RCM concern
  • ABS module concern
E1 CHECK THE IPC (INSTRUMENT PANEL CLUSTER) FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the IPC self-test.

Are there any Diagnostic Trouble Codes (DTCs) present?
Yes
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
No GO to E2

E2 CHECK THE PCM (POWERTRAIN CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the IPC self-test.

Are there any Diagnostic Trouble Codes (DTCs) present?
Yes For 2.0L engines,
REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 1.5L EcoBoost (132kW/180PS) – I3 (Y1), Diagnosis and Testing). For 2.5L engines,
REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 1.5L EcoBoost (132kW/180PS) – I3 (Y1), Diagnosis and Testing).
No GO to E3

E3 CHECK THE RCM (RESTRAINTS CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the IPC self-test.

Are there any Diagnostic Trouble Codes (DTCs) present?
Yes
REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
No GO to E4

E4 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) FOR MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the IPC self-test.

Are there any Diagnostic Trouble Codes (DTCs) present?
Yes Refer to the ABS module DTC chart in this section.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST F: ABS MODULE HIGH VOLTAGE CONCERN
Introduction
Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module may set an over-voltage DTC if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.

The ABS module, hydraulic pump and solenoid valves require an operating voltage between 10 and 17 volts. The parking brake system requires an operating voltage of 9 volts or higher. The ABS module receives this voltage from the BJB . The ABS module has 2 ground circuits.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U3003:17 Battery Voltage: Circuit Voltage Above Threshold Sets when the ABS module detects an over-voltage condition in the vehicle battery and charging system.

Possible Sources

  • Charging system concern
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)
PINPOINT TEST G: REDUCED SYSTEM FUNCTION
Introduction

Normal Operation and Fault Conditions

The ABS module incorporates a function for testing the vehicle on a dynamometer to prevent wheel speed sensor Diagnostic Trouble Codes (DTCs) from setting during testing. The PCM sends a message to the ABS module when the vehicle is setup for testing. When the ABS module receives this message it knows to ignore discrepancies between the front and rear wheel speed sensors.

The ABS module exits the test mode automatically when the PCM sends the exit message, the ignition is set to OFF, either of the non-driven wheels exceeds 20 km/h (12 mph) or a wheel speed sensor DTC is detected on any wheel speed sensor.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U2001:00 Reduced System Function: No Sub Type Information Sets when the ABS module has been set to dynamometer test mode.

Possible Sources

  • ABS module in test mode

Visual Inspection and Pre-checks

  • Drive the vehicle above 20 km/h (12 mph). Stop and cycle the ignition from ON to OFF and back to ON. Carry out the ABS module self-test. If the DTC returns, retrieve and diagnose all PCM Diagnostic Trouble Codes (DTCs).
PINPOINT TEST H: HYDRAULIC PUMP FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

On vacuum brake booster equipped vehicles, The ABS module uses an internal solid state switch to operate the hydraulic pump motor. The ABS module tests the hydraulic pump motor by activating it for 30 milliseconds. The ABS module monitors the voltage drop across the hydraulic pump motor while the pump motor is being activated. After 30 milliseconds have passed, the ABS module stops applying voltage to the pump motor and monitors the voltage the spinning hydraulic pump motor is generating and the voltage drop across the hydraulic pump motor solid state switch. If the monitored voltages are not within the specifications, the ABS module sets one or more Diagnostic Trouble Codes (DTCs).

On EBB equipped vehicles, the ABS module performs a check of the hydraulic system during start up and during drive cycles. The ABS module monitors the hydraulic pump motor in the EBB unit for any drops in voltage output during these tests. If a condition such as a short to ground or an open exist, the ABS module sets a DTC and modifies brake and ABS operation until the condition has been corrected.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0020:11 ABS Pump Motor Control: Circuit Short To Ground Vacuum brake booster: Sets when the ABS module detects the voltage drop across the solid state switch is too high when the pump motor is activated. This can be due to a shorted switch, a shorted motor or a locked motor. EBB : The ABS module receives 3 voltage inputs, 1 input is only present with the ignition ON, the other 2 are fused battery voltage. One battery voltage input is for the pump motor and the other is for the hydraulic valves. The ABS module compares these 2 voltage inputs, if the difference between these 2 voltage inputs exceeds a pre-set parameter, this DTC sets.
ABS C0020:12 ABS Pump Motor Control: Circuit Short To Battery Vacuum brake booster: Sets when the ABS module detects more than 0.93 volt for longer than 3 seconds from the pump motor once the pump motor has been deactivated. EBB : Sets when the ABS module detects an overvoltage condition due to an internal failure of the ECU .
ABS C0020:13 ABS Pump Motor Control: Circuit Open Vacuum brake booster: Sets when the ABS module detects the voltage supplied to the ABS module is less than 10 volts, if there is an open or high resistance on the ABS pump motor circuit between the ABS module and the HCU , or if the ABS module is faulted internally.
ABS C0020:49 ABS Pump Motor Control: Internal Electronic Failure Vacuum brake booster: Sets if the hydraulic pump motor actual state does not match the commanded state for 30 seconds; pump is running, pump is not running or pump motor relay shorted. EBB : Sets if the hydraulic pump motor actual state does not match the commanded state for 30 seconds; pump is running, pump is not running or pump motor relay shorted.
ABS C0020:71 ABS Pump Motor Control: Actuator Stuck Vacuum brake booster: Sets when the ABS module detects hydraulic pump motor is not rotating when it is commanded to run.
ABS C052E:A2 ABS Pump Motor Control Circuit Low: System Voltage Low EBB : Sets when the ABS module detects an undervoltage condition preventing the operation of the power assisted brakes. This results in high brake pedal effort.

Possible Sources

  • Low voltage concern - battery or charging system
  • Fuses
  • Wiring, terminals or connectors
  • ABS module and HCU (vacuum brake booster)
  • EBB unit (electric brake booster)
PINPOINT TEST CO: ELECTRIC BRAKE BOOSTER (EBB) UNIT INTERNAL FAILURE
Introduction

Normal Operation and Fault Conditions

The EBB contains several hydraulic valves, hydraulic pressure sensors, a linear actuator and a pump motor. These components work in conjunction to provide the force necessary to bring the vehicle to a stop. The ABS module monitors these components for internal faults. If a fault occurs which impacts the base braking system, the ABS module sets one or more Diagnostic Trouble Codes (DTCs) and illuminates the red brake warning indicator.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0047:1C Brake Booster Pressure Sensor: Circuit Voltage Out Of Range This DTC sets when a higher or lower than expected pressure sensor voltage which is detected within the EBB unit.
ABS C0047:64 Brake Booster Pressure Sensor: Signal Plausibility Failure This DTC sets when a pressure sensor reading that does not match what is expected is detected within the EBB unit.
ABS C1013:09 Brake System Pressure: Component Failures This DTC sets when an internal component failure is detected within the EBB unit.
ABS C1013:7A Brake System Pressure: Fluid Leak Or Seal Failure This DTC sets when a loss of brake fluid pressure is detected within the brake system.
ABS C1013:7C Brake System Pressure: Slow Response This DTC sets when the brake system takes longer than expected to drain and fill.
ABS C1013:92 Brake System Pressure: Performance Or Incorrect Operation This DTC sets when a loss of brake pressure or excessive brake pressure is detected within the brake system.
ABS C1019:29 Linear Actuator Control (LAC): Signal Invalid This DTC sets an invalid signal is sent from the linear actuator control.
ABS C1019:74 Linear Actuator Control (LAC): Actuator Slipping This DTC sets when the lac exceeds the upper or lower end of travel
ABS C1019:78 Linear Actuator Control (LAC): Alignment Or Adjustment Incorrect This DTC sets when a misalignment or misadjustment concern with the linear actuator control is detected.
ABS C1019:92 Linear Actuator Control (LAC): Performance Or Incorrect Operation This DTC sets when a lack of performance or operation in the linear actuator control is detected.

Possible Sources

  • Air trapped in the hydraulic system
  • External brake system leak
  • Internal EBB unit leak
  • EBB unit internal failure
PINPOINT TEST AV: ABS MODULE COMMUNICATION CONCERN WITH GSM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the GSM sends messages to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a GSM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the GSM , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0103:00 Lost Communication With Gear Shift Control Module A: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the GSM within the allowed time.
ABS U0404:00 Invalid Data Received from Gear Shift Control Module A: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the GSM within the allowed time.

Possible Sources

  • Network communication concern
  • GSM
PINPOINT TEST ZA: TIRE DIAMETER CONCERNS
Introduction

Normal Operation and Fault Conditions

The BCM is programmed with vehicle tire size information during the module configuration step. The BCM shares tire size information with other module over the HS-CAN1 through the GWM . When this DTC sets, the ABS module sends a message to the IPC to illuminate the ABS warning indicator.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0078:56 Tire Diameter: Invalid/Incompatible Configuration If the tire size message sent to the ABS module from the BCM contains invalid data, this DTC sets.

Possible Sources

  • Temporary or mini-spare tire in use
  • Under inflated tires
  • Mismatched sized wheels and tires
  • Network communication concern
  • Incorrect BCM configuration
PINPOINT TEST L: ELECTRIC BRAKE BOOSTER (EBB) BRAKE FLUID LEVEL

Normal Operation and Fault Conditions

The brake fluid level switch is hardwired to the ABS module, the module monitors the switch and brake fluid level. If a circuit fault or fluid loss is detected, a DTC is set.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0049:01 Brake Fluid Level: General Electrical Failure Sets when the ABS module detects a short to ground, voltage or an open circuit in the brake fluid level switch or circuits.
ABS C0049:7A Brake Fluid Level: Fluid Leak Or Seal Failure This DTC sets due to air in the system from a hydraulic fluid leak.
ABS C0049:7B Brake Fluid Level: Low Fluid Level Sets when the ABS module determines the fluid level in the hydraulic system is low.

Possible Sources

  • Wiring, terminals or connectors
  • Leak in the hydraulic system
  • Brake fluid level switch
  • EBB unit
L1 CHECK THE ABS MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, retrieve all ABS module Diagnostic Trouble Codes (DTCs).
  • Note all ABS module Diagnostic Trouble Codes (DTCs).

Is DTC C0049:01 present in the ABS module?
Yes
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
No For DTC C0049:7A, INSPECT the brake system for leaks, REPAIR and REFILL the system as necessary. If there are no leaks or evidence of leaks, BLEED the brake system. REFER to Section 206-00 in the Workshop Manual.
For DTC C0049:7B, CHECK the brake fluid level and FILL as necessary.
For all other ABS module Diagnostic Trouble Codes (DTCs), GO to the DTC Chart in this section.

PINPOINT TEST M: FRONT WHEEL SPEED SENSOR ELECTRICAL FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

Active wheel speed sensors generate a voltage signal proportional to wheel speed which is sent to the ABS module. Each wheel speed sensor is connected to the ABS module through 2 wires and a connector at each wheel speed sensor. The 2 circuits provide both sensor power and sensor signal return. When the ignition mode is set to ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0031:01 Left Front Wheel Speed Sensor: General Electrical Failure Sets when the wheel speed signal continuously exceeds a specified threshold or is operating outside of the allowable range
ABS C0034:01 Right Front Wheel Speed Sensor: General Electrical Failure Sets when the wheel speed signal continuously exceeds a specified threshold or is operating outside of the allowable range

Possible Sources

  • Wiring, terminals or connectors
  • Wheel speed sensor
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)

Visual Inspection and Pre-checks

  • Make sure the wheel speed sensor harness is routed correctly and is undamaged.
  • Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.
PINPOINT TEST N: REAR WHEEL SPEED SENSOR ELECTRICAL FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

Active wheel speed sensors generate a voltage signal proportional to wheel speed which is sent to the ABS module. Each wheel speed sensor is connected to the ABS module through 2 wires and a connector at each wheel speed sensor. The 2 circuits provide both sensor power and sensor signal return. When the ignition mode is set to ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0037:01 Left Rear Wheel Speed Sensor: General Electrical Failure Sets when the wheel speed signal continuously exceeds a specified threshold or is operating outside of the allowable range
ABS C003A:01 Right Rear Wheel Speed Sensor: General Electrical Failure Sets when the wheel speed signal continuously exceeds a specified threshold or is operating outside of the allowable range

Possible Sources

  • Wiring, terminals or connectors
  • Wheel speed sensor
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)

Visual Inspection and Pre-checks

  • Make sure the wheel speed sensor harness is routed correctly and is undamaged.
  • Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.
PINPOINT TEST O: THE TRACTION CONTROL SYSTEM IS INOPERATIVE OR CANNOT BE DISABLED USING THE TRACTION CONTROL SWITCH

NOTE: If equipped, MyKey allows users to configure traction control to be either always on or selectable. If a MyKey restricted key is in use with the MyKey traction control feature configured to always on, traction control cannot be disabled. An admin key must be used to enable and disable traction control.

NOTE: This test requires the use of at least 2 ignition keys (passive or IKT ) programmed to the vehicle; one admin ignition key and one restricted ignition key.

Normal Operation and Fault Conditions

The traction control switch is part of the instrument panel console switch assembly and is used to switch the traction control feature on or off. When the traction control switch is pressed, the instrument panel console switch assembly sends a ground signal to the IPC . The IPC sends a message to the GWM over the HS-CAN3 , the GWM relays this message to the ABS module over the HS-CAN2 . The ABS module continues to monitor for wheel spin but takes no action until the traction control message indicates the system has been turned on.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C1109:64 Vehicle Dynamics Control Switch: Signal Plausibility Failure Sets when the traction control message from the IPC indicates the traction control switch has been pressed in the applied position for longer than 10 seconds. This can be due to a wiring concern in the traction control circuit, an internal failure of the traction control switch or an internal failure of the IPC .

Possible Sources

  • Wiring, terminals or connectors
  • Instrument panel console switch assembly
  • IPC

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

O1 CHECK THE ABS MODULE FOR DTCS
  • Put the ABS module in sleep mode by performing the following steps:
    • With ALL doors closed, set the ignition from ON to OFF.
    • Disconnect the diagnostic scan tool.
    • Open the door, exit the vehicle and close the door.
    • Wait a minimum of 90 seconds for the ABS module to enter sleep mode.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C1109:64 or U0155:xx present in the ABS module?
Yes For DTC C1109:64, GO to O6
For DTC U0155:xx, GO to Pinpoint Test AR
No For all other module Diagnostic Trouble Codes (DTCs), GO to the ABS Module DTC Chart.
If no Diagnostic Trouble Codes (DTCs) are present, GO to O2

O2 CHECK THE IPC FOR DTCS
  • Using a diagnostic scan tool, carry out the IPC self-test.

Are there any Diagnostic Trouble Codes (DTCs) present in the IPC ?
Yes DIAGNOSE all IPC Diagnostic Trouble Codes (DTCs).
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
No GO to O3

O3 VERIFY THE IGNITION KEY IN USE IS NOT RESTRICTED
  • For vehicles equipped with a keyless vehicle system,
    • place 1 of the passive keys inside the vehicle and all other passive keys at least 1 meter (3 feet) away from the vehicle.
    • press the start-stop button without pressing the brake pedal.
  • For vehicles not equipped with a keyless vehicle system, turn the ignition to the ON position.
  • Monitor the message center.

Does the message center display MYKEY ACTIVE DRIVE SAFELY?
Yes The current ignition key is a restricted key and is operating correctly. GO to O4
No REPEAT the test steps using different ignition keys until the message center DOES NOT display MYKEY ACTIVE DRIVE SAFELY. GO to O4

O4 VERIFY THE MYKEY TRACTION CONTROL SETTING
  • Using the message center, verify the MyKey traction control setting.
    • Refer to the Owner's Literature for instructions on setting the MyKey functions.

Is the MyKey traction control setting configured to always on?
Yes GO to O5
No GO to O6

O5 VERIFY TRACTION CONTROL FUNCTION CAN BE DISABLED USING THE ADMIN IGNITION KEY
  • Using the message center, verify traction control can be enabled and disabled using the admin ignition key.
    • Refer to the Owner's Literature for instructions on enabling and disabling traction control.

Can traction control be enabled and disabled using the admin ignition key?
Yes GO to O6
No RETRIEVE and DIAGNOSE all IPC Diagnostic Trouble Codes (DTCs).
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).

O6 CHECK THE INSTRUMENT PANEL CONSOLE SWITCH GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect IPC C220 .
  • Disconnect Instrument panel console switch assembly C3010 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-12   Ground

Is the resistance less than 3 ohms?
Yes GO to O7
No REPAIR the circuit.

O7 CHECK THE TRACTION CONTROL SIGNAL CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-10   C220-6

Is the resistance less than 3 ohms?
Yes GO to O8
No REPAIR the circuit.

O8 CHECK THE TRACTION CONTROL SIGNAL CIRCUIT FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-10   Ground

Is the resistance greater than 10,000 ohms?
Yes INSTALL a new instrument panel console switch assembly.
No REPAIR the circuit.

PINPOINT TEST P: PATS TARGET IDENTIFIER

Normal Operation and Fault Conditions

The ABS module and BCM share a secret code (target identifier) when the ignition is set to ON. This code is generated during the PATS programming procedure. If either a new BCM or a new ABS module has been installed, the PATS programming procedure must be carried out.

REFER to: Perimeter Anti-Theft Alarm - System Operation and Component Description (419-01A Perimeter Anti-Theft Alarm, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS B10DA:51 PATS Target Identifier: Not Programmed Sets when the target identifier sent from the BCM does not match the target identifier programmed in the ABS module.

Possible Sources

  • Network communication concern
  • BCM programming error
  • ABS module programming error

Visual Inspection and Pre-checks

  • Check the vehicle repair history and determine if a new BCM or ABS module has been installed. If a new module has been installed, verify it has been programmed correctly and verify the PATS programming procedure has been carried out.
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST LA: STEERING WHEEL SENSOR POSITION FAULTS
Introduction

Normal Operation and Fault Conditions

The PSCM calculates steering wheel rotation speed, angle and direction of rotation and sends the information to the ABS module over the HS-CAN2 . A failure of the HS-CAN2 , the PSCM or the internal sensors causes the ABS module to set one or more Diagnostic Trouble Codes (DTCs) and the ABS warning indicator is illuminated.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0051:64 Steering Wheel Position Sensor: Signal Plausibility Failure This DTC sets when the ABS module determines the steering angle message is implausible when compared to the steering angle module value (based on the yaw rate sensor information). This DTC also sets if the long term offset compensation monitoring is completed after more than 30 km (18 miles) of straight driving resulting in a long term filtered steering angle offset greater than 15 degrees.
ABS C0051:67 Steering Wheel Position Sensor: Signal Incorrect After Event Sets when the ABS module detects the center position of the steering wheel cannot be determined after 30 seconds of driving at a speed between 14.4 km/h (9 mph) and 48 km/h (30 mph).
ABS C0051:85 Steering Wheel Position Sensor: Signal Above Allowable Range Sets when the total steering wheel angle is above 1,440 degrees.
ABS C0051:86 Steering Wheel Position Sensor: Signal Invalid Sets when the steering angle sensor information from the PSCM is "invalid", "unknown" or "faulty" instead of the actual sensor information.

Possible Sources

  • Incorrectly mounted RCM
  • Network communication concern
  • Incomplete or incorrect stability control sensor calibration
  • Mismatched wheels and tires
  • Loose or worn suspension components
  • Loose or worn steering components
  • RCM
  • PSCM
PINPOINT TEST R: ABS MODULE COMMUNICATION CONCERN WITH CCM
Introduction

Normal Operation and Fault Conditions

The CCM communicates with the IPMA over a private CAN . The IPMA sends the CCM messages to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a CCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the CCM and IPMA , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U2107:00 Collision Mitigation By Braking: No Sub Type Information This DTC sets when the collision deceleration message from the is sent too often or the duration of the message is too long.

Possible Sources

  • Network communication concern
  • CCM
PINPOINT TEST BQ: ABS MODULE COMMUNICATION CONCERN WITH IPMA
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the IPMA sends messages to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a IPMA failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the IPMA , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U023A:00 Lost Communication With Image Processing Module A: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the IPMA within the allowed time.
ABS U053B:00 Invalid Data Received From Image Processing Module A: No Sub Type Information This DTC sets when the ABS module receives messages but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • IPMA
PINPOINT TEST T: BRAKE SYSTEM FILL NOT COMPLETE

Normal Operation and Fault Conditions

These Diagnostic Trouble Codes (DTCs) are pre-set in a new ABS module and can only be cleared when the brake system has been successfully bled.

The brake system requires a certain amount of hydraulic fluid for correct operation. When the brake system is filled, the ABS module sets a PID . If the vehicle is operated and the ABS module detects this PID has not been set, a DTC is set.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C1020:00 Brake System Fill Not Complete: No Sub Type Information This DTC is pre-set in a new ABS module and can only be cleared when the brake system has been successfully bled.
ABS C1020:52 Brake System Fill Not Complete: Not Activated This DTC is pre-set in a new ABS module and can only be cleared when the brake system has been successfully bled.

Possible Sources

  • Brake system has not been bled
T1 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM)DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Is any DTC from the DTC Fault Trigger Conditions table present?
Yes CARRY OUT the brake system bleed procedure.
REFER to: Brake System Pressure Bleeding - Vehicles With: Electric Brake Booster (206-00 Brake System - General Information, General Procedures).
or REFER to: Brake System Pressure Bleeding - Vehicles With: Vacuum Brake Booster (206-00 Brake System - General Information, General Procedures).
No The system is operating correctly at this time.

PINPOINT TEST U: THE HILL DESCENT CONTROL FEATURE IS INOPERATIVE

Normal Operation and Fault Conditions

The hill descent control switch is part of the instrument panel console switch assembly and is hardwired to the IPC . When the hill descent control switch is pressed, the IPC receives a ground signal and sends a message to the GWM over the MS-CAN . The GWM relays the message to the ABS module over the HS-CAN2 . If the ABS module does not receive any messages within a certain time frame (usually less than 1 second) or if the message contains invalid information, the ABS module sets a DTC .

Possible Sources

  • Wiring, terminals or connectors.
  • Instrument panel switch assembly
  • Network concern
  • IPC
U1 CHECK THE IPC COMMUNICATIONS
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the IPC self-test.
  • Retrieve and record all IPC Diagnostic Trouble Codes (DTCs).

Does the IPC communicate with the diagnostic scan tool?
Yes GO to U2
No DIAGNOSE the IPC does not communicate with the diagnostic scan tool.
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

U2 CHECK THE IPC DIAGNOSTIC TROUBLE CODES (DTCS)
  • Review the results from the previous step.

Are there any Diagnostic Trouble Codes (DTCs) present and active in the IPC ?
Yes DIAGNOSE all IPC Diagnostic Trouble Codes (DTCs).
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
No GO to U3

U3 CHECK THE INSTRUMENT PANEL CONSOLE SWITCH GROUND CIRCUIT FOR AN OPEN
  • Disconnect IPC C220 .
  • Disconnect Instrument panel console switch assembly C3010 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-12   Ground

Is the resistance less than 3 ohms?
Yes GO to U4
No REPAIR the circuit.

U4 CHECK THE HILL DESCENT CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-2   Ground

Is any voltage present?
Yes REPAIR the circuit for a short to voltage.
CLEAR any Diagnostic Trouble Codes (DTCs) from the IPC .
No GO to U5

U5 CHECK THE HILL DESCENT CONTROL CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to U6
No REPAIR the circuit.

U6 CHECK THE HILL DESCENT CONTROL CIRCUIT FOR AN OPEN CIRCUIT
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-2   C220-7

Is the resistance less than 3 ohms?
Yes REPAIR the circuit.
No INSTALL a new instrument panel console switch assembly.

PINPOINT TEST V: NO POWER BRAKE ASSIST OR EXCESSIVE POWER BRAKE ASSIST - EBB SYSTEM

Normal Operation and Fault Conditions

The ABS module monitors all base brake, anti-lock brake, traction control and stability control functions and features. If a system error occurs which could cause irreparable damage to the system, the ABS module disables the EBB unit. The base brake system still functions, but there is no brake boost assist. This can also occur if the EBB unit loses power or ground.

System over-voltage combined with other specific circumstances may cause the EBB unit to provide excessive brake assist or a "touchy" pedal, where the brakes apply heavily with a light application of the brake pedal.

In either of these cases, no brake assist or too much brake assist, the ABS module sets Diagnostic Trouble Codes (DTCs) indicating possible concerns.

Possible Sources

  • Diagnostic Trouble Codes (DTCs) preset in the ABS module

Visual Inspection and Pre-checks

  • RETRIEVE and DIAGNOSE all ABS module Diagnostic Trouble Codes (DTCs)
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST BF: ABS FALSE ACTIVATION, ABS TOO SENSITIVE, ABS ACTIVATES ON NORMAL STOP
Introduction

Normal Operation and Fault Conditions

The ABS module uses several sensors (wheel speed, steering wheel rotation, stability control) to determine if ABS or stability control intervention is required. Accurate sensor readings rely on the vehicle being in good operational condition with as few mechanical and electrical concerns as possible. In addition, the wheels and tires must be within vehicle manufacturer's specifications as described on the VC label and the base brake system and parking brake system must be in good operational condition. If one or more of these items or systems are in need or repair or are not working at full capacity, the ABS or stability control system may activate when the driving condition does not warrant activation.

Possible Sources

  • Wheels
  • Tires
  • Suspension components
  • Parking brake dragging
  • PSCM
  • RCM
PINPOINT TEST X: CONTROL MODULE IMPROPER WAKE-UP PERFORMANCE

Normal Operation and Fault Conditions

The ABS module continually monitors the brake system for potential system concerns. During module wake up, several items are monitored and certain operations are expected to be performed. If one or more of these do not occur as expected, the ABS module sets a DTC and requests the illumination of the ABS warning indicator.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U3012:68 Control Module Improper Wake-up Performance: Event Information This DTC sets due to a temporary condition in the EBB unit and usually sets as a result of another DTC setting. RETRIEVE and DIAGNOSE all other ABS module Diagnostic Trouble Codes (DTCs).

Possible Sources

  • Other Diagnostic Trouble Codes (DTCs) present in the ABS module
  • EBB unit
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST Y: ABS MODULE INTERNAL FAULT CONCERN
Introduction

Normal Operation and Fault Conditions

The ABS module carries out self tests during operation, the module also monitors various inputs and compares the values to what is expected. If the values received are out of range, are not what is expected, or if any of the self tests fail, the ABS module sets a DTC .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0001:01 TCS Control Channel 'A' Valve 1: General Electrical Failure Sets when the ABS module detects an internal fault.
ABS C0002:01 TCS Control Channel 'A' Valve 2: General Electrical Failure Sets when the ABS module detects an internal fault.
ABS C0003:01 TCS Control Channel 'B' Valve 1: General Electrical Failure Sets when the ABS module detects an internal fault.
ABS C0004:01 TCS Control Channel 'B' Valve 2: General Electrical Failure Sets when the ABS module detects an internal fault.
ABS C1B11:71 Pressure Control Valve: Actuator Stuck Sets when the ABS module detects an unwanted opening or closing of the pressure control valve. This is most likely due to an internal failure of the EBB .
ABS U3000:00 Control Module: No Sub Type Information Sets when the ABS module detects an internal hardware fault.
ABS U3000:49 Control Module: Internal Electronic Failure Sets when the ABS module detects an internal hardware fault.
ABS U3000:4B Control Module: Over Temperature Sets when the ABS module detects excessive temperature within the ABS module.
ABS U3000:96 Control Module: Component Internal Failure Sets when the ABS module detects an internal hardware fault.

Possible Sources

  • Incorrect sensor input
  • Stuck valve
  • EBB unit (electric boosted vehicles)
  • ABS module (vacuum boosted vehicles)
PINPOINT TEST Z: MODULE CONFIGURATION CONCERN
Introduction

Normal Operation and Fault Conditions

During new module installation, configuration files are loaded into the new module being replaced. If a discrepancy is detected between the modules or an incomplete programming procedure is carried out, a DTC is set.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C1018:61 Regenerative Braking: Signal Calculation Failure Sets due to incomplete or improper module programming procedures.
ABS C101F:46 Generic Valve Failure: Calibration/Parameter Memory Failure Sets due to incomplete or improper module programming procedures.
ABS C101F:49 Generic Valve Failure: Internal Electronic Failure Sets due to incomplete or improper module programming procedures.
ABS U0300:51 Internal Control Module Software Incompatibility: Not Programmed Sets due to incomplete or improper module programming procedures.
ABS U2017:57 Control Module Software #2: Invalid/Incompatible Software Component Sets if the RSC calibration variant and the ABS module configuration do not match.
ABS U2017:93 Control Module Software #2: No Operation Sets if the RSC control logic cannot initialize after stable driving conditions are detected. This is usually due to an incomplete or improper module programming procedures.
ABS U2018:57 Control Module Software #3: Invalid/Incompatible Software Component Sets if the selectable drive mode software and the ABS module configuration do not match.
ABS U2024:51 Control Module Cal-Config Data: Not Programmed Sets due to incomplete or improper module programming procedures.
ABS U2100:00 Initial Configuration Not Complete: No Sub Type Information Sets due to incomplete or improper module programming procedures.
ABS U2101:00 Control Module Configuration Incompatible: No Sub Type Information Sets due to incomplete or improper module programming procedures.
ABS U2200:00 Control Module Configuration Memory Corrupt: No Sub Type Information Sets due to incomplete or improper module programming procedures.

Possible Sources

  • Incomplete programming procedure
  • Improper programming procedure
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)
PINPOINT TEST AA: THE SELECTABLE DRIVE MODE FEATURE IS INOPERATIVE, CANNOT BE ENABLED OR DISABLED

Normal Operation and Fault Conditions

The selectable drive mode switch is part of the instrument panel console switch assembly and is hardwired to the HVAC control module. When the drive mode switch is pressed, the HVAC control module receives a ground signal and sends a message to the GWM over the MS-CAN . The GWM relays the message to the ABS module over the HS-CAN2 . If the ABS module does not receive any messages within a certain time frame (usually less than 1 second) or if the message contains invalid information, the ABS module sets a DTC .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS P05D3:86 Driver Mode Select Switch 'A' Range/Performance: Signal Invalid Sets when the selectable drive mode switch button has been pressed for longer than 30 seconds. This can be due to a circuit failure, an instrument panel console switch assembly internal failure, an internal failure of the HVAC control module or a network communication concern.

Possible Sources

  • Wiring, terminals or connectors.
  • Instrument panel switch assembly
  • Network concern
  • HVAC control module
AA1 CHECK THE HVAC CONTROL MODULE COMMUNICATIONS
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the HVAC control module self-test.
  • Retrieve and record all HVAC control module Diagnostic Trouble Codes (DTCs).

Does the HVAC control module communicate with the diagnostic scan tool?
Yes GO to AA2
No DIAGNOSE the HVAC control module does not communicate with the diagnostic scan tool.
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

AA2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Review the results from the previous step.

Are there any Diagnostic Trouble Codes (DTCs) present and active in the HVAC control module?
Yes DIAGNOSE all HVAC control module Diagnostic Trouble Codes (DTCs).
REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC)/Electronic Automatic Temperature Control (EATC) (412-00 Climate Control System - General Information, Diagnosis and Testing).
No GO to AA3

AA3 CHECK THE INSTRUMENT PANEL CONSOLE SWITCH GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect HVAC Module C228A .
  • Disconnect Instrument panel console switch assembly C3010 .
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-12   Ground

Is the resistance less than 3 ohms?
Yes GO to AA4
No REPAIR the circuit.

AA4 CHECK THE SELECTABLE DRIVE MODE CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-1   Ground

Is any voltage present?
Yes REPAIR the circuit for a short to voltage.
CLEAR any Diagnostic Trouble Codes (DTCs) from the HVAC control module.
No GO to AA5

AA5 CHECK THE SELECTABLE DRIVE MODE CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-1   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to AA6
No REPAIR the circuit.

AA6 CHECK THE SELECTABLE DRIVE MODE CIRCUIT FOR AN OPEN CIRCUIT
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-1   C228A-14

Is the resistance less than 3 ohms?
Yes INSTALL a new instrument panel console switch assembly.
No REPAIR the circuit.

PINPOINT TEST AB: WHEEL SPEED SENSOR ERRATIC SIGNAL FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The wheel speed sensor uses the tone ring to generate a square wave signal proportional to wheel speed which is sent to the ABS module. The front wheel bearing, rear axle shafts, tone rings and wheel speed sensors must be undamaged and free from any contamination to produce a clean signal for use by the ABS module. Also, all 4 tires and wheels must be of the same manufacturer recommended size for the wheel speed sensor to generate an accurate wheel speed signal.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0030:07 Left Front Tone Wheel: Mechanical Failures The ABS module calculates the number of expected tone wheel pulses and then monitors the wheel speed signal input. If 1 or more pulses are missing for more than the allowed time, this DTC is set.
ABS C0031:07 Left Front Wheel Speed Sensor: Mechanical Failures Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
ABS C0031:2F Left Front Wheel Speed Sensor: Signal Erratic The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If an individual wheel speed signal is erratic (too high, too low) for more than the allowed time, this DTC is set.
ABS C0031:64 Left Front Wheel Speed Sensor: Signal Plausibility Failure The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If 1 or more wheel speed signals does not match the other wheel speeds and the referenced vehicle speed for more than the allowed time, this DTC is set.
ABS C0033:07 Right Front Tone Wheel: Mechanical Failures The ABS module calculates the number of expected tone wheel pulses and then monitors the wheel speed signal input. If 1 or more pulses are missing for more than the allowed time, this DTC is set.
ABS C0034:07 Right Front Wheel Speed Sensor: Mechanical Failures Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
ABS C0034:2F Right Front Wheel Speed Sensor: Signal Erratic The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If an individual wheel speed signal is erratic (too high, too low) for more than the allowed time, this DTC is set.
ABS C0034:64 Right Front Wheel Speed Sensor: Signal Plausibility Failure The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If 1 or more wheel speed signals does not match the other wheel speeds and the referenced vehicle speed for more than the allowed time, this DTC is set.
ABS C0036:07 Left Rear Tone Wheel: Mechanical Failures The ABS module calculates the number of expected tone wheel pulses and then monitors the wheel speed signal input. If 1 or more pulses are missing for more than the allowed time, this DTC is set.
ABS C0037:07 Left Rear Wheel Speed Sensor: Mechanical Failures Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
ABS C0037:2F Left Rear Wheel Speed Sensor: Signal Erratic The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If an individual wheel speed signal is erratic (too high, too low) for more than the allowed time, this DTC is set.
ABS C0037:64 Left Rear Wheel Speed Sensor: Signal Plausibility Failure The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If 1 or more wheel speed signals does not match the other wheel speeds and the referenced vehicle speed for more than the allowed time, this DTC is set.
ABS C0039:07 Right Rear Tone Wheel: Mechanical Failures The ABS module calculates the number of expected tone wheel pulses and then monitors the wheel speed signal input. If 1 or more pulses are missing for more than the allowed time, this DTC is set.
ABS C003A:07 Right Rear Wheel Speed Sensor: Mechanical Failures Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
ABS C003A:2F Right Rear Wheel Speed Sensor: Signal Erratic The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If an individual wheel speed signal is erratic (too high, too low) for more than the allowed time, this DTC is set.
ABS C003A:64 Right Rear Wheel Speed Sensor: Signal Plausibility Failure The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If 1 or more wheel speed signals does not match the other wheel speeds and the referenced vehicle speed for more than the allowed time, this DTC is set.

Possible Sources

  • Tire Pressure
  • Incorrect or mismatched tire
  • Wheel speed sensor encoder contamination
  • Wiring, terminals or connectors
  • Wheel bearing
  • Wheel speed sensor encoder ring
  • Wheel speed sensor
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)
PINPOINT TEST AC: BRAKE PEDAL SWITCH FAULTS
Introduction

Normal Operation and Fault Conditions

The BPP switch is also known as the stoplamp switch.

The ABS module receives BPP switch input from the PCM through the GWM over the HS-CAN . The ABS module compares this information against brake fluid pressure sensor input and brake pedal input to determine if the BPP switch input is valid. An incorrectly installed BPP switch can cause a signal plausibility concern. An implausible signal can also be created if a driver is resting one foot on the brake pedal while using the other foot to press the accelerator.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0040:64 Brake Pedal Switch 'A': Signal Plausibility Failure This DTC sets due to any of the following conditions:
  • The BPP switch signal is active for more than 6 minutes when traveling faster than 20 km/h (12 mph), the brake fluid pressure is equal to or below 3 bar (44 psi) and the BPP switch signal has never been inactive during the current ignition cycle.
  • If the BPP switch signal is active for more than 12 minutes when traveling faster than 20 km/h (12 mph), the brake fluid pressure is equal to or below 3 bar (44 psi) and the BPP switch signal has been inactive during the current ignition cycle.
  • If the BPP switch CAN messages are missing.
  • If the brake fluid pressure exceeds 15 bar (218 psi) and the BPP switch signal is inactive for longer than 1 second.

Possible Sources

  • Pressing both pedals (brake and accelerator) at the same time
  • Wiring, terminals or connectors
  • Brake pedal (stoplamp) switch
  • Network communication concern
  • .ABS module (vacuum booster equipped vehicles)
  • EBB unit (electric booster equipped vehicles)
PINPOINT TEST AD: STABILITY SYSTEM ACTIVE TOO LONG CONCERN
Introduction

Normal Operation and Fault Conditions

The ABS module uses information from the wheel speed sensors, RCM and PSCM to determine when stability control intervention is necessary to help stabilize the vehicle. The ABS module uses the EBB unit (electric boosted vehicles) or the HCU (vacuum boosted vehicles) to modulate the brake fluid pressure to the brake calipers and continues to monitor the sensor and module input until the instability event has been corrected. Once the sensors and modules indicate the instability event has been corrected, the ABS module deactivates the EBB unit (electric boosted vehicles) or the HCU (vacuum boosted vehicles). Under inflated tires, wheels and tires that do not match VC label specifications, suspension and steering damage, and one or more sensor failures contribute to the ABS module setting this DTC .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C006B:00 Stability System Active Too Long: No Sub Type Information Sets when the ABS module detects the ABS ESC or RSC function has been active for longer than the various sensors indicate is necessary.

Possible Sources

  • Tire pressure
  • Wiring, terminals or connectors
  • Chassis damage
  • Steering damage or alignment
  • Wheel speed sensor
  • RCM
  • PSCM
PINPOINT TEST AE: ABS MODULE COMMUNICATION CONCERN WITH PSCM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the PSCM sends messages to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a PSCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the PSCM , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0131:00 Lost Communication With Power Steering Control Module 'A': No Sub Type Information This DTC sets when the ABS module does not receive any messages from the PSCM within the allowed time.
ABS U0420:00 Invalid Data Received from Power Steering Control Module 'A': No Sub Type Information This DTC sets when the ABS module receives messages from the PSCM , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • GWM
  • PSCM
PINPOINT TEST AF: ABS MODULE VIN MISMATCH
Introduction

Normal Operation and Fault Conditions

When the ignition is set to ON, the ABS module and the BCM share VIN information through the GWM over the HS-CAN1 and FD-CAN .

When a new EBB unit or ABS module is installed, the ABS module must be programmed with the vehicle information. REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U3002:51 Vehicle Identification Number: Not Programmed Sets when the VIN has not been programmed in the ABS module.
ABS U3002:62 Vehicle Identification Number: Signal Compare Failure Sets when the VIN message sent by the BCM does not match the VIN stored in the ABS module.

Possible Sources

  • BCM configuration
  • ABS module configuration
PINPOINT TEST AG: THE ABS MODULE DOES NOT RESPOND TO THE DIAGNOSTIC SCAN TOOL

Normal Operation and Fault Conditions

With the ignition ON, the diagnostic scan tool communicates with the ABS module over the HS-CAN2 . Communications can be interrupted by a wiring condition such as a short to ground, a short to voltage or an open circuit; module failure may also be a cause of no communication.

Refer to Section 418-00 to diagnose the no communication concern. REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

Possible Sources

  • Fuse
  • Wiring, terminals or connectors
  • EBB unit (electric boosted vehicles)
  • ABS module (vacuum boosted vehicles)
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST AH: STABILITY CONTROL SENSOR SIGNAL FAILURE FAULTS
Introduction

Normal Operation and Fault Conditions

The ABS module uses a vacuum sensor to monitor the brake booster vacuum.

On 2.0L EcoBoost engines, a camshaft driven vacuum pump supplies the vacuum to the brake booster. The vacuum pump is expected to produce at least 600 mBar (18 In-Hg). A leak in a vacuum hose, brake booster or one of the seals on the brake booster or vacuum pump prevents the vacuum pump from achieving the required amount of vacuum. Damage or an internal failure also prevents the vacuum pump from operating at peak capacity.

On all other engines, the engine supplies the vacuum to the brake booster through a series of hoses and tubes. A leak in a vacuum hose, tube, brake booster or one of the seals on the brake booster or vacuum pump prevents the brake booster from achieving the required amount of vacuum.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C1015:7A Vacuum Supply: Fluid Leak Or Seal Failure Sets when the ABS module detects a decrease in brake booster vacuum without brake system activation.
ABS C1015:7B Vacuum Supply: Low Fluid Level Sets when the ABS module detects the brake vacuum pump or engine is unable to produce the vacuum necessary for brake system operation.

Possible Sources

  • Vacuum leak
  • Vacuum hose obstruction
  • Vacuum pump (if equipped)
  • Brake booster
PINPOINT TEST AI: ABS MODULE COMMUNICATION CONCERN WITH PCM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the PCM sends messages to the GWM over the HS-CAN1 . The GWM relays these message to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a PCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the PCM , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

The TCM is an internal component of the PCM .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C1137:64 Reverse gear switch: Signal Plausibility Failure This DTC sets when the when the reverse gear message sent from the PCM indicates the transmission is in REVERSE when other stability control inputs received by the ABS module indicate the vehicle is moving forward.
ABS U0100:00 Lost Communication With ECM/PCM 'A': No Sub Type Information This DTC sets when the ABS module does not receive any messages from the PCM within the allowed time.
ABS U0101:00 Lost Communication with TCM: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the PCM within the allowed time.
ABS U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information This DTC sets when the ABS module receives messages but the messages contain invalid data.
ABS U0401:64 Invalid Data Received from ECM/PCM A: Signal Plausibility Failure This DTC sets when the ABS module receives messages but the messages contain invalid data.
ABS U0401:86 Invalid Data Received from ECM/PCM A: Signal Invalid This DTC sets when the ABS module receives messages but the messages contain invalid data.
ABS U0402:00 Invalid Data Received from TCM: No Sub Type Information This DTC sets when the ABS module receives messages but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • PCM
PINPOINT TEST AJ: THE BRAKE WARNING INDICATOR, ABS WARNING INDICATOR OR STABILITY-TRACTION CONTROL INDICATOR (SLIDING-CAR ICON) IS ALWAYS ON OR NEVER ON

Normal Operation and Fault Conditions

With the ignition in RUN, the ABS module continuously monitors the base brake system, the ABS , and the stability control system. If there is a concern present in one of the systems, the ABS module sets a DTC and sends a message to the GWM over the FD-CAN , the GWM relays this message to the IPC . Once the message is received, the IPC illuminates the appropriate warning indicator.

The IPC also illuminates the warning indicators as part of a self test when the ignition is set to RUN or ACC. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description (413-01 Instrumentation, Message Center and Warning Chimes, Description and Operation).

Possible Sources

  • Diagnostic Trouble Codes (DTCs) present in the ABS module
  • Low brake fluid
  • Brake fluid level sensor
  • ABS or stability control concern
  • IPC concern

Visual Inspection and Pre-checks

  • Check for ABS module Diagnostic Trouble Codes (DTCs), if there are no Diagnostic Trouble Codes (DTCs) present, refer to Section 413-01 to diagnose the IPC warning indicators.
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST BP: ABS MODULE COMMUNICATION CONCERN WITH GWM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the GWM sends messages to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a GWM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the GWM , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0146:00 Lost Communication With Serial Data Gateway 'A': No Sub Type Information This DTC sets when the ABS module does not receive any messages from the GWM within the allowed time.

Possible Sources

  • Network communication concern
  • GWM
PINPOINT TEST AL: INCORRECT WHEEL SPEED SENSOR FAULT
Introduction

Normal Operation and Fault Conditions

The ABS module carries out a self-check each time the ignition mode is changed to RUN. If the ABS module detects a fault, one or more Diagnostic Trouble Codes (DTCs) set. REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0031:4A Left Front Wheel Speed Sensor: Incorrect Component Installed Sets when the ABS module detects an incorrect wheel speed sensor type.
ABS C0034:4A Right Front Wheel Speed Sensor: Incorrect Component Installed Sets when the ABS module detects an incorrect wheel speed sensor type.
ABS C0037:4A Left Rear Wheel Speed Sensor: Incorrect Component Installed Sets when the ABS module detects an incorrect wheel speed sensor type.
ABS C003A:4A Right Rear Wheel Speed Sensor: Incorrect Component Installed Sets when the ABS module detects an incorrect wheel speed sensor type.

Possible Sources

  • Wheel speed sensor input concern
  • Wheel speed sensor
  • EBB unit ( EBB vehicles
  • ABS module (vacuum brake booster vehicles)
PINPOINT TEST AM: BRAKE PRESSURE SENSOR FAULTS
Introduction

Normal Operation and Fault Conditions

The ABS module monitors various inputs and compares the values to what should be expected. If the values received are out of range or not what should be expected, the ABS module sets a DTC .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0044:49 Brake Pressure Sensor 'A': Internal Electronic Failure Sets when the ABS module detects an internal fault with the EBB unit (electric boosted vehicles) or the HCU (vacuum boosted vehicles).
ABS C0044:51 Brake Pressure Sensor 'A': Not Programmed When a new pressure sensor is calibrated, the information is stored in memory. If the calibration has not taken place or if the calibration files are lost or corrupt, this DTC sets.
ABS C0044:64 Brake Pressure Sensor 'A': Signal Plausibility Failure Sets when the ABS module detects a fault with the brake fluid pressure.
ABS C0044:8F Brake Pressure Sensor 'A': Erratic Sets when the ABS module detects an internal fault with the EBB unit (electric boosted vehicles) or the HCU (vacuum boosted vehicles).
ABS C1A08:1C Pressure Sensor Supply: Circuit Voltage Out Of Range Sets when the ABS module detects the brake system pressure sensor voltage supply is out of range.

Possible Sources

  • Incorrect sensor input
  • Air trapped in the hydraulic system
  • EBB unit (electric boosted vehicles)
  • ABS module and HCU assembly (vacuum boosted vehicles)
PINPOINT TEST AN: STABILITY CONTROL SENSOR INITIALIZATION FAULT
Introduction

Normal Operation and Fault Conditions

The ABS module monitors various inputs and compares the values to what should be expected. If the values received are out of range or not what is expected, the ABS module sets a DTC . When a new ABS module or RCM is installed, the stability control sensors in the RCM must be initialized. This is accomplished using a diagnostic scan tool to run the ABS Calibration routine.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0061:54 Lateral Acceleration Sensor: Missing Calibration Sets when the ABS module detects the stability sensors in the RCM have not been calibrated or the calibration has been lost.
ABS C0062:54 Longitudinal Acceleration Sensor: Missing Calibration Sets when the ABS module detects the stability sensors in the RCM have not been calibrated or the calibration has been lost.
ABS C006A:95 Multi-axis Acceleration Sensor: Incorrect Assembly The sensor cluster sends an identification number to the ABS module when the ABS Calibration routine is carried out. This identification number is then shared between the modules when the ignition is set to ON. This DTC sets when the sensor cluster identification number does not match the last valid identification number and the new valid sensor identification number.

Possible Sources

  • ABS Calibration routine not carried out
  • RCM concern
  • EBB unit (electric boosted vehicles)
  • ABS module (vacuum boosted vehicles)
PINPOINT TEST AO: THE AUTO HOLD FEATURE IS INOPERATIVE, CANNOT BE DISABLED OR ENABLED

Normal Operation and Fault Conditions

Vehicles equipped with EPB are also equipped with an auto hold feature. This feature must be enabled by the driver by pressing the auto hold switch once the driver seatbelt is buckled and the driver door is closed.

The auto hold switch is part of the instrument panel console switch assembly and is hardwired to the HVAC control module. Pressing the auto hold switch enables the auto hold feature, but does not activate auto hold.

When the switch is pressed, the HVAC control module receives a ground signal from the switch. The HVAC control module sends a message to the GWM over the MS-CAN . The GWM relays the message to the ABS module over the HS-CAN2 indicating the system has been enabled. The ABS module then waits for messages from the RCM and BCM as well as ABS sensor information to indicate the auto hold feature can be activated. Once all criteria has been met, the ABS module activates the auto hold feature.

In the case of a system error, the instrument cluster displays messages and icons.

Possible Sources

  • Wiring, terminals or connectors
  • Network communication concern
  • Instrument panel console switch assembly
  • RCM concern
  • BCM concern
  • HVAC module concern
AO1 CHECK THE NETWORK COMMUNICATIONS
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the Network test.

Do the HVAC control module, RCM and BCM communicate with the diagnostic scan tool?
Yes GO to AO2
No DIAGNOSE the HVAC control module, RCM or BCM does not communicate with the diagnostic scan tool.
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

AO2 CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the following module self-tests:
    • BCM
    • HVAC control module
    • RCM

Are there any Diagnostic Trouble Codes (DTCs) present and active in the HVAC control module, RCM or BCM ?
Yes DIAGNOSE all HVAC control module Diagnostic Trouble Codes (DTCs).
REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC)/Electronic Automatic Temperature Control (EATC) (412-00 Climate Control System - General Information, Diagnosis and Testing). DIAGNOSE all RCM Diagnostic Trouble Codes (DTCs).
REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing). DIAGNOSE all BCM Diagnostic Trouble Codes (DTCs).
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
No GO to AO3

AO3 CHECK THE AUTO HOLD ENGAGE CIRCUIT FOR A SHORT TO VOLTAGE
  • Disconnect HVAC C228A.
  • Disconnect Instrument panel console switch assembly C3010.
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-3   Ground

Is any voltage present?
Yes REPAIR the circuit for a short to voltage.
CLEAR any Diagnostic Trouble Codes (DTCs) from the HVAC control module.
No GO to AO4

AO4 CHECK THE AUTO HOLD ENGAGE CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-3   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to AO5
No REPAIR the circuit.

AO5 CHECK THE AUTO HOLD ENGAGE CIRCUIT FOR AN OPEN CIRCUIT
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3010-3   C228A-5

Is the resistance less than 3 ohms?
Yes REPAIR the circuit.
No INSTALL a new instrument panel console switch assembly.

PINPOINT TEST BX: ABS MODULE COMMUNICATION CONCERN WITH AWD MODULE
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the AWD module sends messages to the GWM over the HS-CAN1 . The GWM relays these message to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a AWD module failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the AWD module refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U011D:00 Lost Communication With All Wheel Drive Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the AWD module within the allowed time.
ABS U041E:00 Invalid Data Received From All Wheel Drive Control Module: No Sub Type Information This DTC sets when the ABS module receives messages but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • AWD module
PINPOINT TEST AQ: CRUISE CONTROL BRAKING FAULT
Introduction

Normal Operation and Fault Conditions

The CCM communicates with the IPMA over a private CAN . The IPMA sends the CCM messages to the GWM over the HS-CAN2 . The GWM relays these messages to the ABS module over the FD-CAN . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a CCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the CCM and IPMA , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U2107:68 Collision Mitigation By Braking: Event Information Sets when the ABS module detects the vehicle deceleration is implausibly high when compared to the vehicle deceleration requested by the CCM . This is most likely caused by an abrupt stop of the vehicle due to a collision, an extreme driving situation, a mechanical or electrical failure of the cruise control system or an internal failure of the ABS module.
ABS U2108:68 Adaptive Cruise Control: Event Information Sets when the ABS module detects the vehicle deceleration is implausibly high when compared to the vehicle deceleration requested by the CCM . This is most likely caused by an abrupt stop of the vehicle due to a collision, an extreme driving situation, a mechanical or electrical failure of the cruise control system or an internal failure of the ABS module.

Possible Sources

  • Network communication concern
  • CCM
PINPOINT TEST AR: ABS MODULE COMMUNICATION CONCERN WITH IPC
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the IPC sends messages to the GWM over the HS-CAN3 . The GWM relays these messages to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a IPC failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the IPC , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the IPC within the allowed time.

Possible Sources

  • Network communication concern
  • GWM
  • IPC
PINPOINT TEST AS: ABS MODULE COMMUNICATION CONCERN WITH FCIM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the FCIM sends messages to the GWM over the MS-CAN , The GWM relays these messages to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a FCIM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the FCIM , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

The hill descent control switch is part of the FCIM . When the hill descent control switch is touched, the FCIM sends a message to the GWM over the HS-CAN3 . The GWM relays the message to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within a certain time frame (usually less than 1 second) or if the message contains invalid information, the ABS module sets a DTC .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0256:00 Lost Communication With Front Controls Interface Module 'A': No Sub Type Information This DTC sets when the ABS module does not receive any messages from the FCIM within the allowed time.
ABS U0557:00 Invalid Data Received From Front Controls Interface Module 'A': No Sub Type Information This DTC sets when the ABS module receives messages from the FCIM , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • GWM
  • FCIM
PINPOINT TEST CP: ELECTRIC BRAKE BOOSTER (EBB) MOTOR FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The EBB unit uses a motor to pressurize the brake system and to operate the ABS , ESC , RSC and other stability control features. The ABS module monitors the motor performance and sets a DTC when a motor fault is detected.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0594:12 Brake Booster Motor 'A' Performance: Circuit Short To Battery This DTC sets when the ABS module detects a higher voltage than expected.
ABS C0594:78 Brake Booster Motor 'A' Performance: Alignment Or Adjustment Incorrect This DTC sets when the ABS module detects a booster motor adjustment or alignment condition within the HCU .
ABS C0594:92 Brake Booster Motor 'A' Performance: Performance Or Incorrect Operation This DTC sets when the ABS module detects when the brake booster motor 'A' is not performing correctly or is inoperative.
ABS C0596:00 Brake Booster Motor 'A' Current Sensor Circuit Range/Performance: No Sub Type Information This DTC sets when the ABS module detects a current sensor reading outside the expected range.

Possible Sources

  • Fuses
  • Wiring, terminals or connectors
  • EBB unit
PINPOINT TEST CM: ABS MODULE COMMUNICATION CONCERN WITH HEV-PCM
Introduction

NOTE: The HEV - PCM may also be known as the SOBDMC .

Normal Operation and Fault Conditions

With the ignition ON, the HEV - PCM sends messages to the GWM over the HS-CAN1 . The GWM relays these message to the ABS module over the HS-CAN2 . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a HEV - PCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the HEV - PCM , refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0594:00 Invalid Data Received From Hybrid/EV Powertrain Control Module 'A': No Sub Type Information This DTC sets if the ABS module receives a fault message in the regenerative brake wheel torque message from the HEV - PCM .

Possible Sources

  • Network communication concern
  • HEV - PCM
PINPOINT TEST BH: STABILITY CONTROL SENSOR SIGNAL FAILURE FAULTS
Introduction

Normal Operation and Fault Conditions

The ABS module receives vehicle yaw rate, lateral acceleration, longitudinal acceleration and roll rate from RCM over the HS-CAN2 , through the GWM . The yaw rate sensor, lateral accelerometer, longitudinal accelerometer and roll rate sensor are all contained in the RCM . A failure of the HS-CAN2 , an internal failure of the RCM or the internal sensors causes the ABS module to set one or more Diagnostic Trouble Codes (DTCs).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0061:28 Lateral Acceleration Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets if the absolute value of the lateral acceleration message from the RCM is outside of the maximum allowable range.
ABS C0061:64 Lateral Acceleration Sensor: Signal Plausibility Failure The ABS module creates a reference value based on all other available sensor signals and compares this value. If the 2 values differ by more than the predetermined value, this DTC is set.
ABS C0062:28 Longitudinal Acceleration Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets if the absolute value of the longitudinal acceleration message from the RCM is outside of the maximum allowable range.
ABS C0062:64 Longitudinal Acceleration Sensor: Signal Plausibility Failure Sets if the sensor signal does not match the other stability sensor signals (steering angle, yaw rate, longitudinal acceleration or lateral acceleration).
ABS C0063:28 Yaw Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets if the absolute value of the yaw rate message from the RCM is outside of the maximum allowable range.
ABS C0063:64 Yaw Rate Sensor: Signal Plausibility Failure Sets if the sensor signal does not match the other stability sensor signals (steering angle, yaw rate, longitudinal acceleration or lateral acceleration).
ABS C0064:28 Roll Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets if the sensor signal does not match the other stability sensor signals (steering angle, yaw rate, longitudinal acceleration or lateral acceleration).
ABS C0064:64 Roll Rate Sensor: Signal Plausibility Failure Sets if the sensor signal does not match the other stability sensor signals (steering angle, yaw rate, longitudinal acceleration or lateral acceleration).
ABS U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the RCM within the allowed time.
ABS U0452:00 Invalid Data Received From Restraints Control Module: No Sub Type Information Sets if the yaw rate, roll rate, longitudinal acceleration or lateral acceleration messages from the RCM are invalid.
ABS U0452:86 Invalid Data Received From Restraints Control Module: Signal Invalid This DTC sets when the ABS module receives the yaw rate messages from the RCM , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • Incorrectly installed RCM
  • RCM

    Description and Operation - Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description

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