Diagnostic Test

WARNING: This page is about a different car, the 2023 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE POWERTRAIN CONTROL MODULE (PCM) SOFTWARE LEVEL

Turn the ignition on.
With the scan tool, verify that the PCM is operating at the latest software version available.
Perform any Service Bulletins or PCM flash updates that may apply.
Were any Service Bulletins or PCM flash updates available for this condition?

Yes
- Perform the appropriate repair.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to POWERTRAIN CONTROL MODULE .
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .