Ford Escape: Rear View Mirrors / Description and Operation - Rear View Mirrors - System Operation and Component Description

System Operation

System Diagram - Exterior, Power

Network Message Chart

  Module Network Input Messages — PDM

Rear View Mirrors - Exterior, Power

All functions of the power mirror feature are integrated into one switch module (integral to the LH front door window control switch). The left and right side selection buttons have an LED to indicate which side is active and a directional pad is used for directional control. Neutral is achieved by pressing the lit button to deactivate the left or right exterior mirror, or by allowing the system to time out and reset to neutral.

When the exterior mirror directional pad switch is pressed left, right, up or down with the LH or RH exterior mirror selected, the movement request is sent to the DDM through a LIN circuit. If the LH mirror is selected, the DDM supplies voltage and ground to the appropriate LH exterior mirror motor. If the RH mirror is selected, the DDM sends the passenger mirror command message with the input from the exterior mirror control switch to the PDM . The PDM then supplies voltage and ground to the appropriate RH exterior mirror motor. The DDM and PDM controls the glass movements by reversing polarity of the voltage and ground circuits being supplied to each motor.

System Diagram - Exterior, Heated

Network Message Chart

  Module Network Input Messages — DDM

  Module Network Input Messages — PDM

  Module Network Input Messages — FCIM

Rear View Mirrors - Exterior, Heated

NOTE: The DDM and PDM automatically deactivate the heated exterior mirrors when the ambient air temperature is above 30° C (86° F).

The rear window defrost system controls operation of the heated exterior mirror glass. The heated exterior mirror glass only operates when the rear window defrost system is active. The heated exterior rear view mirror glass deactivates when the rear window defrost deactivates.

The heated mirrors are heated for a period of 10 minutes when the engine is running and the defrost system is activated.

When the rear window defrost button (integral to the FCIM ) is pressed, the mirror heat on request message is sent from the FCIM to the DDM and PDM over the MS-CAN . The DDM supplies voltage and ground to the LH exterior mirror heater circuits and the PDM supplies voltage and ground to the RH exterior mirror heater circuits when the exterior mirror heaters are commanded on by the FCIM .

On vehicles equipped with a LH exterior auto-dimming mirror, the LH exterior mirror glass takes longer to defrost than the RH exterior mirror glass due to differences in the mirror glass thickness.

When a concern exists, the DDM and PDM are capable of setting and storing Diagnostic Trouble Codes (DTCs) for the mirrors heater element circuits.

The rear window defrost can also be commanded on and off using voice commands or by touching the rear window defrost button located on the FDIM . For additional information on voice or touchscreen commanded features, refer to the Owner's Literature.

For additional information on the rear window defrost system,
Refer to: Glass, Frames and Mechanisms - Vehicles With: One-Touch Open and Close Front Windows - Overview (501-11 Glass, Frames and Mechanisms, Description and Operation).

Network Message Chart

  Module Network Input Messages — DDM

System Operation - Interior Manual-Dimming

The manual interior rear view mirror can be adjusted from a day position to a night position to reduce unwanted glare caused by headlamps from behind the vehicle. Adjusting the interior mirror is accomplished by using the day/night tab, located on the bottom of the interior mirror. Pulling the tab rearward, towards the driver, adjusts the mirror to the night position. Pushing the tap forward, away from the driver, adjusts the mirror to the day position.

System Operation - Interior Auto-Dimming

The auto-dimming feature is active any time the ignition is ON. The interior auto-dimming mirror uses 2 integral photoelectric sensors to detect exterior lighting conditions. When the forward facing sensor detects daytime conditions, the rearward facing sensor is inactive and the mirror glass stays in a high reflectance mode. When the forward facing sensor detects nighttime conditions, the rearward facing sensor is active. When bright lights (glare) are detected by the rearward facing sensor, the mirror glass is electronically darkened. To provide increased visibility when backing up, the interior rear view mirror automatically returns to a high reflectance mode any time reverse gear is selected, regardless of exterior lighting conditions.

NOTE: NOTE: Blockage of either sensor causes false readings.

Component Description

Exterior Mirror Control Switch

The exterior mirror control switch is a momentary contact switch, integral to the LH front door window control switch, that provides the driver with the controls to move the LH and RH exterior rear view mirrors left, right, up or down. The exterior mirror control switch is connected to the DDM through a LIN circuit. The LED on each exterior mirror selection button illuminates to indicate which exterior mirror is selected for adjustment.

Exterior Mirror Fold Switch

The exterior mirror fold switch is a momentary contact switch, integral to the LH front door window control switch, that provides the driver with the controls to fold and unfold the LH and RH exterior rear view mirrors. The exterior mirror fold switch is connected to the DDM through a LIN circuit.

Exterior Mirror

Each exterior mirror has 2 bi-directional motors that are used to control the position of the exterior mirror glass. Placing the exterior mirror control switch to the LH or RH position determines which exterior mirror motor to control.

If equipped with memory mirrors, each exterior memory mirror motor is equipped with an integral potentiometer that is monitored by the DDM ( LH mirror) or PDM ( RH mirror) to determine the position of the exterior mirror glass.

If equipped with heated mirrors, the heated exterior mirrors use heating elements that are integral to the exterior mirror glass.

If equipped with the LH exterior auto-dimming mirror, the LH exterior auto-dimming mirror glass electronically darkens when bright light is detected from behind the vehicle during nighttime conditions.

If equipped with folding mirrors, each exterior mirror has an integral bi-directional folding motor allowing the power folding mirrors to be manually (using the exterior mirror fold switch) or automatically (auto-fold feature) folded or unfolded.

The exterior mirrors include turn signals indicators. For additional information on the mirror-mounted turn signals indicators,
Refer to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

The exterior mirrors include puddle lamps. For additional information on the mirror-mounted puddle lamps,
Refer to: Interior Lighting - System Operation and Component Description (417-02 Interior Lighting, Description and Operation).

The exterior mirrors may include BLIS ®/ CTA Light Emitting Diodes (LEDs). For additional information on the mirror-mounted BLIS ®/ CTA Light Emitting Diodes (LEDs),
Refer to: Blind Spot Information System (419-04 Side and Rear Vision, Diagnosis and Testing).

The exterior mirrors use a jumper harness between the vehicle wiring harness, the exterior mirror motors and the heated mirror glass. The exterior mirror jumper harness is integral to the exterior mirror. Before replacing an exterior mirror or motor, inspect the jumper harness for opens, shorted circuits or damaged and pushed-out pins. If a concern with the exterior mirror jumper harness exists, attempt to repair the jumper harness.

DDM

For the exterior mirror power functions, the DDM receives mirror movement requests through the LIN circuit from the exterior mirror control switch. When the LH exterior mirror is selected, the DDM provides voltage and ground to the appropriate LH exterior mirror motor to drive the mirror glass in the desired direction. The DDM sends RH exterior mirror movement requests to the PDM through the MS-CAN .

For the exterior power folding mirrors feature, the DDM receives mirror movement requests through the LIN circuit from the exterior mirror control switch. When a mirror fold is initiated, the DDM supplies voltage and ground to the LH exterior mirror folding motor. When the exterior mirror fold switch is utilized again, the DDM reverses the polarity of the voltage supplied to the LH exterior mirror folding motor. The DDM sends RH exterior mirror fold requests to the PDM through the MS-CAN .

For the exterior heated mirrors feature, the DDM is responsible for supplying voltage to the LH exterior mirror glass heating element based on messages received from the FCIM .

For the exterior memory mirrors feature, the DDM supplies voltage and ground to the LH mirror motor potentiometers. The DDM monitors the feedback from these potentiometers to determine the mirror glass position. Preset memory positions for the LH exterior mirror glass are stored in the DDM memory.

When a concern exists, the DDM is capable of setting and storing Diagnostic Trouble Codes (DTCs) for the LH exterior mirror motor drive circuits, position sensor circuits, heater element circuits and folding mirror motor circuits.

PMI is required if installing a new module.

PDM

For the exterior power functions, when the RH exterior mirror is selected, the PDM supplies voltage and ground to the appropriate RH exterior mirror motor to drive the mirror glass in the desired direction based on messages received from the DDM through the MS-CAN .

For the exterior power folding mirrors feature, when the PDM receives the RH exterior mirror movement requests from DDM over the MS-CAN , it provides voltage and ground to the RH exterior mirror folding motor.

For the exterior heated mirrors feature, the PDM is responsible for supplying voltage to the RH exterior mirror glass heating element based on messages received from the FCIM .

For the exterior memory mirrors feature, the PDM monitors the potentiometers in the RH exterior mirror to determine the position of the exterior mirror glass. Preset memory positions for the RH exterior mirror glass are stored in the PDM .

When a concern exists, the PDM is capable of setting and storing Diagnostic Trouble Codes (DTCs) for the RH exterior mirror motor drive circuits, position sensor circuits, folding mirror motor circuits and mirror heater circuit.

PMI is required if installing a new module.

FCIM

The FCIM contains the rear window defrost button.

PMI is required if installing a new module.

FDIM

The FDIM contains a redundant rear window defrost button on the touchscreen display. The FDIM plugs directly into the APIM , and does not communicate directly on any network.

Interior Rear View Mirror - Manual-Dimming

The manual dimming interior rear view mirror has a lever at the back of the mirror that must be pulled forward or pushed rearward by the driver to activate the manual dimming function. Manual dimming is completely controlled by the driver.

Interior Rear View Mirror - Auto-Dimming

The auto-dimming rear view mirror has 2 photoelectric sensors, one on the front of the mirror (facing the windshield) and one on the rear of the mirror (at the top of the mirror glass). Based on inputs from these sensors, the automatic dimming feature adjusts the reflectance level of the interior rear view mirror glass to eliminate unwanted glare. The reflectance level of the mirror glass is variable and depends on the amount of rear glare in relation to ambient light conditions in front of the interior mirror.