Circuit Description
The body control module (BCM) sends a state of health serial data message to the electronic brake control module (EBCM) within 5.5 seconds after the ignition is turned ON.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0291 Lost Communication with BCM
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The EBCM fails to receive serial data from the BCM.
Action Taken When the DTC Sets
The EBCM sets this information-only DTC as a current DTC for as long as the conditions for setting the DTC are present.
Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Scan Tool Does Not Communicate with Class 2 Device in Computer/Integrating Systems | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
