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HOMESERVICE MANUALSFORD2007ESCAPE BASE, 2.3 Z, FWD, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 14 (ENGINE CONTROLS - DESCRIPTION & OPERATION (EXCEPT DIESEL & HYBRID))ELECTRONIC ENGINE CONTROL (EEC) SYSTEMOVERVIEW
2007 Ford Escape Base, 2.3 Z, FWD, Automatic

Electronic Engine Control (EEC) System: Overview

2007 Ford Escape Base, 2.3 Z, FWD, AutomaticSECTION Overview
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.

The EEC system provides optimum control of the engine and transmission through the enhanced capability of the powertrain control module (PCM). The EEC system also has an on-board diagnostics (OBD) monitoring system with features and functions to meet federal regulations on exhaust emissions.

NOTE: Some vehicle applications use a stand alone transmission control module (TCM). While still part of the EEC system the TCM communicates to the PCM, anti-lock brake system (ABS) module, instrument cluster, and four-wheel drive (4WD) control modules using the high speed CAN communication link. The TCM incorporates a stand alone OBD-II system. The TCM independently processes and stores fault codes, freeze frame, support PIDs as well as J1979 Mode 09 CALID and calibration verification number (CVN). The TCM does not directly illuminate the MIL, but request the PCM to do so. The TCM is located inside the transmission assembly. It is not repairable, with the exception of reprogramming.

Below is a list of transmissions that use a TCM:

  • F21 (FWD) transmission
  • ZF CFT30 (FWD) continuously variable transmission (CVT)
  • ZF 6HP26 (RWD) transmission

For additional information on these transmissions and TCM diagnostics, refer to AUTOMATIC TRANSMISSION/TRANSAXLE .

The EEC system has 2 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 EEC hardware and software are discussed.

This article contains detailed descriptions of the operation of the EEC system input sensors and switches, output actuators, solenoids, relays and connector pins (including other power-ground signals).

The PCM receives information from a variety of sensor and switch inputs. Based on the strategy and calibration stored within the memory chip, 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 and transmission, provides the OBD strategy, controls the malfunction indicator lamp (MIL), communicates to the diagnostic tool via 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).

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.