RAM 2500 Truck 2WD V8-5.7L VIN D (2004)
Body Control Module: Symptom Related Diagnostic Procedures
Non-Trouble Code Procedures
DIAGNOSIS AND TESTING - FRONT CONTROL MODULE
The front control module is a printed circuit board based module with a on-board micro-processor. The front control module interfaces with other
electronic modules in the vehicle via the Programmable Communications Interface (PCI) data bus (J1850). In order to obtain conclusive testing the
Programmable Communications Interface (PCI) data bus network and all of the electronic modules that provide inputs to, or receive outputs from the
front control module must be checked. All PCI (J1850) communication faults must be resolved prior to further diagnosing any front control module
related issues.
The front control module was designed to be diagnosed with an appropriate diagnostic scan tool, such as the DRB Ill®. The most reliable, efficient, and
accurate means to diagnose the front control module requires the use of a DRB JJJ® scan tool and the proper Body Diagnostic Procedures manual.
Before any testing of the front control module is attempted, the battery should be fully charged and all wire harness and ground connections inspected
around the affected areas on the vehicle.
Air Bag System
Test 1
SYMPTOM
AIRBAG INDICATOR ON WITHOUT ACTIVE TROUBLE CODES
POSSIBLE CAUSES
-
Airbag warning indicator on without active trouble codes
-
Instrument cluster problems
AM/FM Switch Inoperative
Test 1
SYMPTOM
AM/FM SWITCH INOPERATIVE
