Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSJEEP2024GRAND CHEROKEE ALTITUDE X, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESBODY CONTROL MODULE (BCM) - DTCS U0246-00 TO U1122-00DTC TROUBLESHOOTINGU1009-00-LIN 2 BUSDIAGNOSTIC TEST

2024 Jeep Grand Cherokee Altitude X, RWD

Diagnostic Test

2024 Jeep Grand Cherokee Altitude X, RWDSECTION Diagnostic Test

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
  - Perform the appropriate INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
DISCONNECT THE LEFT STEERING WHEEL (EVIC) SWITCH HARNESS CONNECTOR - ERASE DTCS AND CHECK THE DTC STATUS
1. Turn the ignition off.
2. Disconnect the component harness connector(s) containing the circuit being tested.
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 BCM DTCs.
  Did the DTC status change from Active to Stored?
  
  Yes
  - Replace the Left Steering Wheel (EVIC) Switch in accordance with the Service Information. Refer to SWITCH, EVIC CONTROL, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
DISCONNECT THE DRIVE MODE SELECT SWITCH HARNESS CONNECTOR - ERASE DTCS AND CHECK THE DTC STATUS
1. Determine if the vehicle is equipped with a Drive Mode Select Switch.
2. Turn the ignition off.
3. Disconnect the component harness connector(s) containing the circuit being tested.
4. With the scan tool, erase all DTCs.
5. Turn the ignition off for a minimum of 10.0 seconds.
6. Turn the ignition on.
7. Using the recorded Environmental Data and the When Monitored Conditions above, operate the vehicle in the conditions that set the DTC.
8. With the scan tool, read BCM DTCs.
  Did the DTC status change from Active to Stored?
  
  Yes
  - Replace the Drive Mode Select Switch in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
DISCONNECT THE WIRELESS CHARGING PAD MODULE (WCPM) HARNESS CONNECTOR - ERASE DTCS AND CHECK THE DTC STATUS
1. Turn the ignition off.
2. Disconnect the component harness connector(s) containing the circuit being tested.
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 BCM DTCs.
  Did the DTC status change from Active to Stored?
  
  Yes
  - Replace the Wireless Charging Pad Module (WCPM) in accordance with the Service Information. Refer to MODULE, WIRELESS CHARGING PAD, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (D402) LIN BUS 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 for 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.