Powertrain Control Module (PCM)

WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

The PCM uses the high speed controller area network (CAN) for communication with the diagnostic tool and other modules on the high speed CAN. The PCM controls the engine for better fuel economy, emissions control, failure mode detection and storage, and all passive anti-theft system (PATS) functions.

Check the high speed CAN circuits between the PCM C175b and the data link connector (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 high speed CAN, damage to the DLC C251, damage to the PCM C175b, or a problem in the in-line connector.

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

For additional PCM information, refer to the INTRODUCTION - GASOLINE article.