Diagnosis And Testing - Front Control Module

WARNING: This page is about a different car, the 2004 Dodge Grand Caravan, 2004 Dodge Caravan, and 2004 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

The Front Control Module (FCM) is a printed circuit board based module with a on-board micro-processor. The FCM interfaces with other electronic modules in the vehicle via the Programmable Communications Interface (PCI) data bus. In order to obtain conclusive testing the PCI data bus and all of the electronic modules that provide inputs to, or receive outputs from the FCM must be checked. All PCI communication faults must be resolved prior to further diagnosing any front control module related issues.

The FCM was designed to be diagnosed with an appropriate diagnostic scan tool, such as the DRBIII®. The most reliable, efficient, and accurate means to diagnose the front control module requires the use of a DRBIII® scan tool and the proper Body Diagnostic Procedures.

Before any testing of the FCM is attempted, the battery should be fully charged and all wire harness and ground connections inspected around the affected areas on the vehicle.