Toyota
Dodge Durango
 Service Manual
Power Lock Systems » Diagnosis and testing
Power lock switch

If the problem being diagnosed involves only the power lock switch illumination LEDs, check the fused ignition switch output (run) and ground circuits at the power lock switch connector. For circuit descriptions and diagrams, refer to 8W-61 - Power Door Locks in Group 8W - Wiring Diagrams.

(1) Check the fuse in the junction block. If OK, go to Step 2. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.

(2) Check for battery voltage at the fuse in the junction block. If OK, go to Step 3. If not OK, repair the open circuit to the Power Distribution Center (PDC) as required.

(3) Disconnect and isolate the battery negative cable. Unplug the wire harness connector from the power lock switch.

(4) Connect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the body half of the power lock switch wire harness connector.

If OK, go to Step 5. If not OK, repair the open circuit to the junction block as required.

(5) Test the power lock switch continuity. See the Power Lock Switch Continuity charts to determine if the continuity is correct in the Off, Lock and Unlock switch positions (Fig. 1) or (Fig. 2). If OK, repair the door lock switch output (lock and/or unlock) circuit(s) from the body half of the power lock switch wire harness connector to the Central Timer Module (CTM) as required. If not OK, replace the faulty switch.

Fig. 1 Power Lock Switch Continuity - Driver Side Fig. 1 Power Lock Switch Continuity - Driver Side

Fig. 2 Power Lock Switch Continuity - Passenger Side Fig. 2 Power Lock Switch Continuity - Passenger Side

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