FAQ for Body Control Module Repair
Q: What kind of tools will be required while servicing the SIR/SRS wire?
A:
The tools required include J 38125-B Terminal Repair Kit.
By BobGM Specialist
01/11/2022 Q: What steps should you take if the voltage is present on only the inputs specified for the ignition switch position?
A:
The proper way is to hold the ignition switch in the position that indicated the incorrect power mode and test the PMM ignition switch inputs for voltage.
By BobGM Specialist
01/11/2022 Q: What will display for the auto-learn timer?
A:
The scan tool displays the seconds used by the BCM to learn valid code from the Passlock(TM) sensor. The learning procedure consists of 3 consecutive periods.
By BobGM Specialist
01/11/2022 Q: What steps should you take if the displayed power mode parameter matches the actual ignition switch position?
A:
The steps are to turn ON the ignition with the engine OFF and observe the Class 2 Power Mode parameter under the Diagnostic Circuit Check menu.
By BobGM Specialist
01/11/2022 Q: How to remove the body control module?
A:
The proper way is to disconnect the negative battery cable(s), remove the knee bolster, disconnect the brown connector and all other connectors, and remove the BCM from the sliding bracket.
By BobGM Specialist
01/11/2022 Q: What will display when the ambient light sensor voltage is in different volts?
A:
The scan tool displays LIGHT when the ambient light sensor voltage is between 2.2-4.7 volts. The scan tool displays DARK when the ambient light sensor voltage is between 0.2-1.3 volts.
By BobGM Specialist
01/11/2022 Q: What should be noticed before servicing the body control module?
A:
You must not clear the DTCs unless directed to do so by the service information provided for each diagnostic procedure. All of the diagnostic data that was saved along with the DTC which may be helpful for some diagnostic procedures will be erased from the memory when the DTCs are cleared.
By BobGM Specialist
01/11/2022 Q: What will display for door lock relay feedback?
A:
The scan tool displays the state of the door lock relay. The scan tool displays ON when the BCM senses the door lock relay coil is energized.
By BobGM Specialist
01/11/2022 Q: What will display for auto headlamps?
A:
The scan tool displays the status of the auto headlamps. The scan tool displays ACTIVE when the auto headlamps are ON.
By BobGM Specialist
01/11/2022 Q: What will display for the dimming?
A:
The scan tool displays the state of the panel dimmer switch. The scan tool displays ACTIVE when the park lamps are ON.
By BobGM Specialist
01/11/2022 See more FAQs (14)