Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TEST REFERENCE - BACKUP LAMPS COME ON WHILE SHIFTER IS NOT IN REVERSE POSITION
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Ignition on, engine not running. Firmly apply brakes. Place the Shift Lever in the position which causes the Backup Lamps to come on at the wrong time. Do the Backup Lamps come while the shifter is not in Reverse? Yes --> Go To 2 No --> Test Complete. |
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| 2 | Ignition on, engine not running. Place the shift lever in a position that causes the Backup Lamps to come on when they should not. Disconnect the Transmission Solenoid/TRS Assembly harness connector.
NOTE:
This will cause a DTC to be stored in the TCM. They must be erased before returning the vehicle to the customer. Did the Backup Lamps go out when the connector was disconnected? Yes --> Go To 3 No --> Go To 4 |
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| 3 | If there are no possible causes remaining, view repair. Repair Replace Transmission Solenoid/TRS Assembly per the Service Information. Perform TRANSMISSION NO TROUBLE CODE VERIFICATION TEST . |
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| 4 | Turn the ignition off to the lock position. Disconnect the Transmission Solenoid/TRS Assembly harness connector. Ignition on, engine not running. Measure the voltage of the Backup Light Supply circuit in the Solenoid/TRS harness connector. Is the voltage above 0.5 volt? Yes --> Repair the Backup Lights Supply circuit for a short to voltage. Perform TRANSMISSION NO TROUBLE CODE VERIFICATION TEST . No --> Test Complete. |
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