Rear Display Communication Fault

REAR DISPLAY COMMUNICATION FAULT





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
With the ignition on.

- Set Condition:
A data line or communication fault is detected.





Diagnostic Test

1. DTC IS ACTIVE
With the scan tool Erase DTCs.
Cycle the ignition off for at least 1 minute.
Turn the ignition on.
With the scan tool under System Tests, perform the Self Test.
With the scan tool read DTCs.
Does this DTC reset?

Yes

- Go To2

No

- Go To6

2. PARK ASSIST DISPLAY SIGNAL CIRCUIT SHORT TO GROUND




Turn the ignition off.
Disconnect the Park Assist Display harness connector.
Disconnect the Park Assist Module harness connector.
Measure the resistance between ground and the Park Assist Display Signal circuit.
Is the resistance below 5.0 ohms?

Yes

- Repair the Park Assist Display Signal circuit for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To3

3. PARK ASSIST DISPLAY CIRCUIT(S) OPEN




Turn the ignition off.
Disconnect the Park Assist Display harness connector.
Disconnect the Park Assist Module harness connector.
Measure the resistance of the Park Assist Display Signal circuit.
Measure the resistance of the Park Assist Display Supply circuit.
Measure the resistance of the Ground circuit.
Is the resistance above 5.0 ohms for any circuit(s)?

Yes

- Repair the circuit(s) for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To4

4. PARK ASSIST DISPLAY CIRCUIT(S) SHORT TO VOLTAGE




Turn the ignition off.
Disconnect the Park Assist Display harness connector.
Disconnect the Park Assist Module harness connector.
Turn the ignition on.
Measure the voltage of the Park Assist Display Signal circuit.
Measure the voltage of the Park Assist Display Supply circuit.
Measure the voltage of the Ground circuit.
Is there voltage present on any of these circuits?

Yes

- Repair the circuit(s) for a short to voltage.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go To5

5. PARK ASSIST DISPLAY
Turn the ignition off.
Replace the Park Assist Display.
Turn the ignition on.
With the scan tool Erase DTCs.
With the scan tool under System Tests, perform the Self Test.
With the scan tool read DTCs.
Does this DTC reset.

Yes

- Replace the Park Assist Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Test Complete.

6. INTERMITTENT CONDITION
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagrams/schematics as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Were any problems found?

Yes

- Repair as necessary.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Test Complete.