Diagnostic Test
- VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE:
Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
NOTE:Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
- Using the scan tool, read active DTCs.
Is this DTC active?
Yes
- Go To 2
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.
- Using the scan tool, read active DTCs.
- CHECK FOR ANY OF THE FOLLOWING ACTIVE DTC'S
- Using the scan tool, read all active DTCs from all modules.NOTE:
Check for TIPM configuration, CAN B or 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.
No
- Go To 3
- Using the scan tool, read all active DTCs from all modules.
- VERIFY THAT THE ECM/PCM IS ACTIVE ON THE BUS
- Turn the ignition on.
- Using the scan tool, select ECU View.
- Verify that the PCM is active on the bus.
Is the PCM active on the bus?
Yes
- Go To 4
No
- Refer to NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) (GPEC) and perform the No Response from PCM diagnostic procedure.
- CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs
- Using the scan tool, select Network View and select Advanced.
Is there more than one module with active DTCs "Logged Against" the PCM?
Yes
- Replace/update the PCM in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Replace/update the module that set this DTC in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
- Using the scan tool, select Network View and select Advanced.