Body Control Module: Service and Repair

NOTICE:
Technicians should not replace the BCM unless - directed to do so by the diagnostic procedures. Most system faults are traceable to faulty wiring, connectors or components. The BCM is very reliable and is not likely the cause of the fault. Do not replace the BCM before performing a complete diagnosis. This may result in the replacement of a good BCM and a recurrence of the fault.

IMPORTANT:
^ If the BCM is replaced, refer to BCM Programming/RPO Configuration to program the new BCM to the current ignition key. Programming and Relearning
^ A new BCM is shipped from the supplier in the factory test mode. This mode allows only limited functionality of the BCM controlled systems. When a new BCM is installed it is necessary to exit the factory test mode prior to returning the vehicle to the customer. To restore the BCM to normal operation, turn the ignition switch from the RUN position to the OFF position 10 times or enter the program mode as described in the theft deterrent system.

REMOVAL PROCEDURE

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.




1. Disconnect the negative battery cable.
2. Remove the Instrument Panel (IP) insulator.




3. Unsnap the Body Control Module (BCM) (3) from the heating, ventilation and air conditioning (HVAC) duct (1).
4. Disconnect the harness electrical connectors (2) from the BCM (3).




5. Disconnect the IP harness extension from the BCM.

INSTALLATION PROCEDURE




1. Connect the IP harness extension to the BCM.




2. Connect the harness electrical connectors (2) to the BCM.
3. Align the BCM to the duct.
4. Snap the BCM (3) to the HVAC duct (1).
5. Install the I/P insulator.




6. Connect the negative battery cable.