Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

1) TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase DTC's

Operate the Passenger Door Lock Switch in all positions several times.

Cycle the ignition from on to off 3 times.

Turn the ignition on.

With the scan tool, read DTC's.

Does the scan tool display PASSENGER DOOR LOCK/UNLOCK SWITCH INPUT CIRCUIT LOW?

Yes
1. Go To step 2).
No
1. The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. Perform BODY VERIFICATION TEST - VER 1 .
2) DOOR LOCK SWITCH SHORTED

Fig 1: Passenger Window/Door Lock Switch Connector
Courtesy of DAIMLERCHRYSLER CORP.

With the scan tool, erase DTC's.

Disconnect the Passenger Window/Door Lock Switch connector.

With the scan tool, read DTC's.

Does the scan tool display PASSENGER DOOR LOCK/UNLOCK SWITCH INPUT CIRCUIT LOW?

No
1. Replace the Passenger Window/Door Lock Switch.
2. Perform BODY VERIFICATION TEST - VER 1 .
Yes
1. Go To step 3).
3) DRIVER DOOR LOCK SWITCH MUX CIRCUIT SHORT TO GROUND

Fig 2: Checking Driver Door Lock Switch MUX Circuit For Short To Ground
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Cluster C3 connector.

Measure the resistance between ground and the Passenger Door Lock Switch Mux circuit.

Is the resistance below 10000.0 ohms?

Yes
1. Repair the Passenger Door Lock Switch Mux circuit for a short to ground.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Replace the Instrument Cluster.
2. Perform BODY VERIFICATION TEST - VER 1 .