Diagnostic Test

WARNING: This page is about a different car, the 2024 Jeep Grand Wagoneer L and 2024 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN OTHER DTCS
1. Turn the ignition on.
2. With the scan tool, select All DTCs.
  Are any DTCs present in the RF HUB?
  
  Yes
  - Refer to DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure.
  No
  - Go To 2
VERIFY THE PROPER VIN IS PROGRAMMED INTO THE PCM
1. With the scan tool, display the VIN that is programmed in the PCM.
  Has the correct VIN been programmed into the PCM?
  
  Yes
  - Go To 3
  No
  - Program the correct VIN into the PCM and retest.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
VERIFY THE PROPER VIN IS PROGRAMMED INTO THE RF HUB
1. With the scan tool, display the VIN that is programmed in the RF Hub.
  Has the correct VIN been programmed into the RF Hub?
  
  Yes
  - Go To 4
  No
  - Program the correct VIN into the RF Hub and retest.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE RKE FUNCTION
1. Use the RKE features on the Key Fob (locks, trunk, etc.).
  Do the RKE functions operate properly?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), MODULE PROGRAMMING .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace the faulty Ignition Key.
    NOTE:
    You must obtain the Secret Key pin number.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .