Ford Escape: Electronic Engine Controls / Description and Operation - Electronic Engine Controls - Overview
Overview
The
EEC system provides optimum control of the engine through the enhanced
capability of the powertrain control module (PCM). The EEC system also
has an on board diagnostic (OBD) monitoring system with features and
functions to meet federal regulations on exhaust emissions.
The
EEC system has two major divisions: hardware and software. The hardware
includes the PCM, sensors, switches, actuators, solenoids, and
interconnecting terminals. The software in the PCM provides the strategy
control for outputs (engine hardware) based on the values of the inputs
to the PCM.
The
PCM receives information from a variety of sensor and switch inputs.
Based on the strategy and calibration stored within the PCM, the PCM
generates the appropriate output. The system is designed to minimize
emissions and optimize fuel economy and driveability. The software
strategy controls the basic operation of the engine, provides the OBD
strategy, controls the malfunction indicator lamp (MIL), communicates to
the scan tool over the data link connector (DLC), allows for flash
electrically erasable programmable read only memory (EEPROM), provides
idle air and fuel trim, and controls failure mode effects management
(FMEM)
Reference Value Symptom Chart
NOTE:
The Reference Value Symptom Chart provides guidance in
selecting the appropriate parameter identification (PID) or measured
signal related to the fault area...
LH Engine Sensor Locations
Item
Description
1
CHT sensor
2
CMP sensor
3
KS
4
MAPT sensor
5
VCT oil control solenoid
Electronic Engine Controls - RH
Item
Description
1
Catalyst monitor sensor
2
CKP sensor
3
HO2S
Powertrain Control Module (PCM)
Item
Description
1
PCM
..
Other information:
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).
WARNING:
To prevent the risk of high-voltage shock, always follow
precisely all warnings and service instructions, including instructions
to depower the..
System Operation
Fuel Systems
The fuel system supplies the fuel injectors with clean fuel at a
controlled pressure. The PCM controls the fuel pump and monitors the
fuel pump circuit. The PCM
controls the fuel injector ON/OFF cycle duration and determines the
correct timing and amount of fuel delivered. When a new fuel injector is
installed it is necessary to reset the learned values conta..