Powertrain Control Module (PCM)

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

The PCM is on the CAN. The PCM controls the engine for better fuel economy, emissions control, failure mode detection and storage. If one of the communications network circuits become shorted to ground or voltage, or if some but not all termination resistors are lost, communications can continue. Check the communications network circuits 1827 (WH/LG) and 1828 (PK/LG) between the PCM C175 (gasoline) or PCM C176a (diesel) and the DLC C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open circuit in the CAN, damage to the DLC C251, damage to the PCM C175 (gasoline), damage to the PCM C176a (diesel) or a problem in the in-line connector. For additional information, See INTRODUCTION - GASOLINE and/or INTRODUCTION -- 6.0L DIESEL articles.