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HOMESERVICE MANUALSJEEP2024WAGONEER L SERIES II, RWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESBODY CONTROL MODULE (BCM) - DTCS B280F-11 TO U0103-00DTC TROUBLESHOOTINGP04C2-11 FUEL FILL DOOR UNLOCK CONTROL CIRCUIT/SHORT TO GROUNDDIAGNOSTIC TEST
2024 Jeep Wagoneer L Series II, RWD

Diagnostic Test

2024 Jeep Wagoneer L Series II, RWDSECTION Diagnostic Test
  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. With the scan tool, run a vehicle Scan Report, or record the Environmental Data related to the DTCs.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the recorded Environmental Data and the When Monitored Conditions above, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read Body Control Module (BCM) DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK THE FUEL DOOR MOTOR FOR AN INTERNAL SHORT 
    NOTE:

    Additional DTCs may set when the harness connector is disconnected and the ignition is positioned on. After all repairs are completed, make sure to erase any additional DTCs that may have set.

    1. Turn the ignition off.
    2. Disconnect the Fuel Door Motor harness connector.
    3. Turn the ignition on.
    4. With the scan tool, read BCM DTCs.

      Is the DTC Active?

      Yes 

      • Go To  3

      No 

      • Replace the Fuel Door Motor in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  3. DISCONNECT THE BCM HARNESS CONNECTOR(S) AND CHECK THE (P336) FUEL DOOR MOTOR UNLOCK DRIVER CIRCUIT FOR A SHORT TO GROUND 
    1. The ignition must be off when checking a circuit for continuity to ground.
    2. Disconnect all Electronic Control Unit (ECU) harness connectors containing the circuit being tested. Note:  Use the wiring diagram as a guide to follow the path of the circuit.
    3. Connect the negative lead of the DVOM to a known good ground.
    4. Connect the positive lead of the DVOM to the circuit being tested at the ECU or component harness connector and check for continuity between the circuit and ground.
      NOTE:

      When probing a circuit at any harness connector, always use an appropriate probing tool to prevent any possible damage to the harness connector terminals.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.