Body Control Module: Service and Repair

BODY CONTROL MODULE REPLACEMENT

REMOVAL PROCEDURE
Replacing the body control module (BCM) may be necessary when you service the body control system.

IMPORTANT: The ignition switch should be in the OFF position when connecting or disconnecting the connectors to the BCM. Always disconnect the Brown BCM connector FIRST and connect the Brown BCM connector LAST. The BCM can set DTC(s) with the ignition switch in the OFF position. The BCM has battery run down protection for the courtesy lamp circuit. The BCM battery run down protection can not detect shorts on inputs or other circuits which it does not control. The scan tool can be used to put the BCM to sleep in order to check for current draws on circuits which are not controlled by the BCM or controlled by the battery run down protection system. If an excessive current draw is detected, refer to Battery Electrical Drain/Parasitic Load Test in Starting and Charging.

1. Remove the radio from the vehicle.




2. Remove the heater control. Pull the heater control (2) out and down in order to gain access to the body control module.




3. Push upward on the bracket retainer slightly and pull the body control module (2) from the bracket (1) at an angle.




4. Disconnect the electrical connectors (2) from the body control module (1).
5. Remove the body control module from the vehicle.

INSTALLATION PROCEDURE
1. Install the body control module (2) to the vehicle.




2. Install the body control module to the bracket (1) at an angle under the wide hook retainer, with the label facing away from the bracket.
3. Apply pressure on the center of the body control module in order to move the module toward the mounting bracket base. Snap the module into place.
4. Ensure that the module is fully seated. Ensure that both snap retainers are holding the module.




5. Connect the electrical connectors (2) to the body control module (1).




6. Install the heater control (2).
7. Install the radio to the vehicle.
8. Use the following components in order to program the body control module with the proper calibrations:
- The Techline Terminal
- The Scan Tool
9. Perform the body control module programing. Refer to Control Module References. Programming and Relearning
10. Clear the diagnostic trouble codes (DTCs).