Diagnostic Test
- VERIFY DTC IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
- With the scan tool, read active DTCs.
Is this DTC active?
Yes
- Go to step 2
No
- Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the STORED LOST COMMUNICATION DTCS diagnostic procedure.
- With the scan tool, read active DTCs.
- CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
- With the scan tool, read active DTCs from all modules.NOTE: Check for EIS (CGW) configuration, CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
Does the scan tool display any active DTCs to the conditions listed above?
Yes
- Perform the appropriate diagnostic procedure.
- Perform the appropriate VERIFICATION TEST.
No
- Go to step 3
- With the scan tool, read active DTCs from all modules.
- VERIFY THAT THE BCM IS ACTIVE ON THE BUS
- Turn the ignition on.
- With the scan tool, select Network Diagnostics.
- Verify that the BCM is active on the bus.
Is the BCM active on the bus?
Yes
- Go to step 4
No
- Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing for No Response diagnostic procedures.
- CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
- With the scan tool, select Network Diagnostics.
Is there more than one module with active DTCs "Logged Against" the BCM?
Yes
- Replace/update the Body Control Module (BCM) in accordance with the service information.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .
No
- Replace/update the module that set this DTC in accordance with the service information.
- Perform the appropriate VERIFICATION TEST.
- With the scan tool, select Network Diagnostics.