Body Control Module: Testing and Inspection

Body Control Module Programming and Setup

Introduction

During body control module (BCM) related service, the procedures below are designated to set-up the BCM correctly. Before you start, read these procedures carefully and completely.

Setup New Body Control Module (BCM)

Important:
* The BCM will not function properly if the Setup New BCM procedure is not performed.

* Make sure the battery is fully charged before performing the setup procedure.

* Make sure all disconnected devices and connectors have been reconnected

* Make sure that the VIN that is stored in the new BCM matches the vehicle.

* If the scan tool displays UNABLE TO PROGRAM BCM. BCM IS SECURED, then the BCM must be replaced and this procedure must be repeated on a new BCM

1. Turn the ignition switch ON leaving the engine OFF.
2. Navigate to the Special Functions menu in the Body Control Module menu on the Scan Tool, then enter Setup New BCM. Perform the following setup procedures in the order they are listed:

* Setup SDM Part Number in BCM
* New VIN
* Option Configuration
* Point of Sale
* Setup HVAC Cal. LA1 3.4L or LY7 3.6L

3. After all of the previous procedures are complete proceed with the Immobilizer Re-learn procedure. Refer to Programming Immobilizer System Components. Programming and Relearning
4. If the scan tool displays UNABLE TO PROGRAM BCM. BCM IS SECURED, then the BCM must be replaced and this procedure must be repeated on a new BCM.

NOTE: After the above procedure has been completed, personalization of the BCM defaults to the factory settings. Inform the customer that the personalization settings must be set again.

Important: After programming, perform the following to avoid future misdiagnosis:

1. Turn the ignition OFF for 10 seconds.
2. Connect the scan tool to the data link connector.
3. Turn the ignition ON with the engine OFF.
4. Use the scan tool in order to retrieve history DTCs from all modules.
5. Clear all history DTCs.