Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Body Control Module: Testing and Inspection
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Body Control Module Programming and Setup
The body control module (BCM) must be programmed with the proper calibration software. The BCM stores and utilizes this information however if it is not properly configured with the correct calibration software, the BCM will not control all of the vehicle features properly.
Ensure that the following conditions exist in order to prepare for BCM programming:
1. The battery is fully charged.
2. The MDI data link connectors are secure.
3. The scan tool is loaded with the most current software version.
4. All disconnected control modules and devices are reconnected securely.
5. This entire procedure has been reviewed before proceeding.
Do not reprogram the body control module unless directed by a service procedure or a service bulletin.
Replace and Program BCM
To program and setup a replacement BCM, perform the following procedure:
1. With a scan tool, access the Service Programming System (SPS) and follow the on-screen instructions. Refer to Service Programming System (SPS) (Service Programming System (SPS)).
2. On the SPS Supported Controllers screen, select BCM Body Control Module Configuration and follow the on-screen instructions (if applicable).
3. On the SPS Supported Controllers screen, select BCM Body Control Module Programming and follow the on-screen instructions.
4. Perform the following for the appropriate ignition type prior to proceeding with the next step:
* Key Ignition System: Key in the ignition and any additional keys must be away from the vehicle at least 3 meters.
* Push Button Start System: Key Fob must be in the console programming pocket. Refer to the Help selection button on the SPS Immobilizer Setup screen for the exact pocket location. All additional Key Fobs must be away from the vehicle at least 3 meters.
Note: The following programming step may take between 10-12 min. and progress will appear to have stopped during this process. This is a normal security timer response and a restart should not be performed.
5. On the SPS Supported Controllers screen, select IMMO Immobilizer Learn Setup. On the next screen, select Body Control Module IMMO Learn with Existing Transponder or Remote Key and follow the on-screen instructions. When Immobilizer Learn is complete, press the Unlock button on the Key Fob to allow the Key Fob to exit the Immobilizer Learn mode.
Note: When performing the Tire Pressure Monitor Sensor Learn during BCM setup, the J-46079 Tire Pressure Monitor Diagnostic Tool must be used to activate each tire pressure sensor.
6. On the SPS Supported Controllers screen, select BCM Body Control Module Setup and follow the on-screen instructions.
7. Check the driver information center display for additional messages regarding further calibration instructions. If there are no addition driver information center instructions present, programming is complete.
Reprogram Existing BCM
To program and setup an existing BCM, perform the following procedure:
1. With a scan tool, access the Service Programming System (SPS) and follow the on-screen instructions. Refer to Service Programming System (SPS) (Service Programming System (SPS)).
2. On the SPS Supported Controllers screen, select BCM Body Control Module Programming and follow the on-screen instructions.
Note: When performing the Tire Pressure Monitor Sensor Learn during BCM setup, the J-46079 Tire Pressure Monitor Diagnostic Tool must be used to activate each tire pressure sensor.
3. On the SPS Supported Controllers screen, select BCM Body Control Module Setup and follow the on-screen instructions.
4. Check the driver information center display for additional messages regarding further calibration instructions. If there are no addition driver information center instructions present, programming is complete.
If the BCM fails to accept the program, verify all scan tool and BCM connections are secure.
Note: After programming is completed, perform the following to avoid future misdiagnosis:
1. Turn the ignition OFF for 10 seconds.
2. Open and close the door.
3. Connect the scan tool to the data link connector.
4. Ignition ON, engine OFF.
5. With a scan tool, clear all DTCs from all control modules.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.