Body Control Module: Service and Repair

Body Control Module (BCM)









Removal

NOTICE: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result.

NOTE: Prior to the replacement of the Body Control Module (BCM), it is necessary to upload the module configuration information to the appropriate scan tool. This information must be downloaded into the new BCM after installation. For additional information, refer to Module Configuration [1][2]Initial Inspection and Diagnostic Overview. In the event that As-Built data entry is required (BCM will not communicate), all Integrated Keyhead Transmitters (IKTs) devices must be programmed. A minimum of 2 devices are necessary to complete the configuration and turn off the flashing interior lights.

1. NOTE: This step is necessary only if the BCM is being replaced.

NOTE: If installing a new BCM, all vehicle keys are erased during the parameter reset procedure. Verify at least 2 of the vehicle keys are available prior to carrying out this procedure.

Upload the module configuration information from the BCM. For additional information, refer to Module Configuration [1][2]Initial Inspection and Diagnostic Overview.

2. Remove the passenger cowl side trim panel. For additional information, refer to Interior Trim and Ornamentation Cowl Side Trim Panel.

3. NOTE: The upper 12A581 harness BCM (B+) connector may be more easily removed after the BCM bolts are removed and the BCM can be positioned lower and away from the body in order for the connector release tangs to be accessed and pressed.

Disconnect the 7 BCM electrical connectors.

4. Remove the in-line connector push-pin from the BCM.

5. Remove the 2 bolts and the BCM.

Installation

1. Install the 2 bolts and the BCM.
- Tighten to 2 Nm (18 lb-in).

2. Install the in-line connector push-pin on the BCM.

3. Connect the 7 BCM electrical connectors.

4. NOTE: If the BCM was not replaced, this is the last step that is necessary.

Install the passenger cowl side trim panel. For additional information, refer to Interior Trim and Ornamentation Cowl Side Trim Panel.

5. Download the BCM configuration information from the scan tool. For additional information, refer to Module Configuration [1][2]Initial Inspection and Diagnostic Overview.

6. NOTE: If a new BCM is installed, the BCM and the PCM require a parameter reset to allow the BCM and the PCM to recognize each other.

NOTE: If equipped, the vehicle's IKTs must be programmed to the new BCM.

If installing a new BCM, carry out the parameter reset and key programming procedure. For additional information, refer to Anti-Theft - Passive Anti-Theft System (PATS) Key Programming.

7. Carry out the BCM on-demand self-test to confirm all DTCs have been cleared.