Power Door Lock Control System:

WARNING: This page is about a different car, the 2002 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

POWER DOOR LOCK CONTROL SYSTEM

Symptom/Suspect Area		Refer To
"Door lock System" Does Not Operate At All
Power Fuse		FUSES & CIRCUIT BREAKERS
POWER Fuse		FUSES & CIRCUIT BREAKERS
Integration Relay		STEP 7 - INSPECT INTEGRATION RELAY CIRCUIT
Wire Harness		POWER DOOR LOCKS
Door Lock System Does Not Operate By Manual Switch
Power Door Lock Control Switch		STEP 1 - MASTER SWITCH, INSPECT DRIVER'S DOOR LOCK CONTROL SWITCH CONTINUITY or STEP 2 - INSPECT PASSENGER'S DOOR LOCK CONTROL SWITCH CONTINUITY
Door Lock Manual Switch		STEP 4 - INSPECT DOOR UNLOCK DETECTION SWITCH
Integration Relay		STEP 7 - INSPECT INTEGRATION RELAY CIRCUIT
Wire Harness		POWER DOOR LOCKS
Door Lock System Does Not Operate By Door Key
Door Key Lock And Unlock Switch		STEP 3 - INSPECT DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
Integration Relay		STEP 7 - INSPECT INTEGRATION RELAY CIRCUIT
Wire Harness		POWER DOOR LOCKS
Door Lock Link Disconnected		N/A
Fault In 2-Operation Unlock Function Of Drivers Door Key Lock And Unlock Switch
Door Key Lock And Unlock Switch		STEP 3 - INSPECT DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
Integration Relay		STEP 7 - INSPECT INTEGRATION RELAY CIRCUIT
Wire Harness		POWER DOOR LOCKS
Fault In Key Confine Prevention Operation
Key Unlock Warning Switch		STEP 3 - INSPECT DOOR KEY LOCK AND UNLOCK SWITCH CONTINUITY
Door Courtesy Switch		STEP 3 - INSPECT DOOR COURTESY SWITCH CONTINUITY
Integration Relay		STEP 7 - INSPECT INTEGRATION RELAY CIRCUIT
Wire Harness		POWER DOOR LOCKS
Only One Door Lock Does Not Operate
Door Lock Motor		STEP 5 - INSPECT DOOR KEY LOCK MOTOR OPERATION
Wire Harness		POWER DOOR LOCKS