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 door locks several times.

Cycle the ignition from on to off.

Turn the ignition on.

With the scan tool, read DTC's.

Does the scan tool display DRIVER DOOR UNLOCK CONTROL CIRCUIT HIGH?

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 RELAY SHORTED TO BATTERY

Fig 1: Checking Door Lock Relay For Short To Battery
Courtesy of DAIMLERCHRYSLER CORP.

NOTE: Ensure the windows are down before proceeding.

Turn the ignition off.

Lock the driver door.

Disconnect the Cluster C2 connector.

Momentarily connect a jumper wire between the (P1) Driver Door Unlock Relay Control circuit and the (Z905) Ground circuit in the Cluster C2 connector.

Did the driver door unlock?

Yes
1. Replace the Instrument Cluster in accordance with service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Go To step 3).
3) (P1) DRIVER DOOR UNLOCK RELAY CONTROL CIRCUIT SHORTED TO BATTERY

Fig 2: Checking (P1) Driver Door Unlock Relay Control Circuit For Short To Battery
Courtesy of DAIMLERCHRYSLER CORP.

Disconnect the Junction Block C2 connector (on top of junction block).

Turn the ignition on.

Measure the voltage between ground and the (P1) Driver Door Unlock Relay Control circuit in the Cluster C2 connector.

Is there any voltage present?

Yes
1. Repair the (P1) Driver Door Unlock Relay Control circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Replace the Junction Block in accordance with service information.
2. Perform BODY VERIFICATION TEST - VER 1 .