Powertrain Control Module (PCM)

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

The PCM is on the CAN and uses this network to communicate with the diagnostic tool. The PCM utilizes an internal termination resistor for normal interface with the CAN. Damage or loss of this termination resistor results in intermittent operation and or failure of the entire CAN. The PCM controls the engine for better fuel economy, emissions control, failure mode detection and storage, all passive anti-theft system (PATS) functions, as well as all 4-wheel drive (4WD) and speed control functions.

For additional 4WD information, refer to FOUR- WHEEL DRIVE SYSTEMS .

For additional speed control information, refer to SPEED CONTROL .

For additional PATS information, refer to ANTI-THEFT - PATS .

See INTRODUCTION - GASOLINE article for diagnosis and testing of the PCM.