Diagnostic Test
- ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing.
Turn the ignition on.
With a scan tool, view DTCs.
Is the status Active for this DTC?
Yes
- Go to 2.
No
- Refer to the *CHECKING FOR AN INTERMITTENT CONDITION Diagnostic Procedure.
- Perform PCM VERIFICATION TEST .
- TCM COMMUNICATION RELATED DTCS IN OTHER MODULES
With a scan tool check for TCM communication related DTCs in other modules on the CAN Bus.
Are there any TCM communication related DTCs in other modules on the CAN Bus at this time?
Yes
- Replace and program the Transmission Control Module (TCM) in accordance with the Service Information.
- Perform PCM VERIFICATION TEST .
No
- Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
- Perform PCM VERIFICATION TEST .