FAQ for Body Control Module Repair
Q: What if a module does not receive a node alive message when expected?
A:
If a module does not receive a node alive message when expected, a DTC will be set.
By BobGM Specialist
01/11/2022 Q: What should be done before system DTC or symptom diagnosis?
A:
The use of the Diagnostic System Check-Vehicle will identify the correct procedures to begin vehicle diagnosis. These must be performed before system DTC or symptom diagnosis.
By BobGM Specialist
01/11/2022 Q: How to avoid future misdiagnosis after programming?
A:
Turn the ignition OFF for 10 seconds, connect the scan tool to the data link connector, turn the ignition ON with the engine OFF, use the scan tool to retrieve history DTCs from all modules, and clear all history DTCs.
By BobGM Specialist
01/11/2022 Q: Will module operations not begin before the system power mode is identified?
A:
Normal vehicle class 2 communications and module operations will not begin until the system power mode has been identified.
By BobGM Specialist
01/11/2022 Q: What is the removal procedure for the Body Control Module?
A:
Ensure that the ignition switch is in the off position, remove the right sound insulator, remove the body control module, and disconnect the BCM connectors from the BCM.
By BobGM Specialist
01/11/2022 Q: What is the installation procedure for the Body Control Module?
A:
Connect the BCM connectors to the BCM, install the BCM module, install the right sound insulator, and program the BCM.
By BobGM Specialist
01/11/2022 Q: What should be done before using the symptom tables?
A:
You should perform the Diagnostic System Check-Vehicle in Vehicle DTC Information before using the symptom tables, and review the system operation to familiarize yourself with the system functions.
By BobGM Specialist
01/11/2022 Q: Why is there intermittent service lamp illumination?
A:
This condition may be caused by a buildup of nonconductive insulating oxidized debris known as fretting corrosion, occurring between two electrical contact surfaces of the connection or connector.
By BobGM Specialist
01/11/2022 Q: When will the BCM enter a sleep state?
A:
The BCM will enter a sleep state when all of the following conditions exist: the ignition switch is off. no activity exists on the serial data line. no outputs are commanded. no delay timers are actively counting. and no wake-up inputs are present.
By BobGM Specialist
01/11/2022 See more FAQs (4)