System Operation Check

Trouble shooting of a power door lock system complaint begins with verification of the customer problem. If problem occurs, go to step 3. If problem does not occur, go to next step.
If problem does not occur, review conditions under which problem occurred for customer and try to duplicate those conditions. For example, if the problem occurs on rainy days or during high humidity conditions, sprinkle water onto vehicle and see if malfunction occurs. DO NOT sprinkle water directly into engine compartment or onto electronic components. Visually inspect for signs of mechanical and electrical damage. Inspect for blown fuses and damaged relays. Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. Ensure any aftermarket electronic equipment is properly installed. If fault is found, repair as necessary.
Inspect the multiplex communication system and confirm that there is no trouble by the basic inspection and DTC check. See PRE-CHECK under SELF-DIAGNOSTIC under MULTIPLEX COMMUNICATION SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

Determine problem symptom. See PROBLEM SYMPTOM INDEX table.

PROBLEM SYMPTOM INDEX

Symptom

Suspected Area ⁽¹⁾

All Doors Cannot Be Locked Or Unlocked (Power Window Control System Is Normal)

⁽²⁾⁽³⁾⁽⁴⁾

Only One Side Door Lock Control Does Not Operate

⁽⁵⁾⁽³⁾

Door Key Related Function Does Not Operate

⁽⁶⁾⁽³⁾⁽⁴⁾

Key Confinement Prevention Function Does Not Operate

⁽⁷⁾⁽⁸⁾⁽³⁾⁽⁴⁾

Luggage Compartment Door Opener Function Does Not Operate (Sedan)

⁽⁹⁾⁽³⁾⁽⁴⁾

Back Door Opener Function Does Not Operate (Wagon)

⁽¹⁰⁾⁽¹¹⁾⁽³⁾⁽⁴⁾

⁽¹⁾	Perform test procedures in order listed under suspected area.

⁽²⁾	Check the door lock control switch. See POWER WINDOW MASTER SWITCH CIRCUIT under CIRCUIT TESTS.

⁽³⁾	Check the wiring harness.

⁽⁴⁾	Check the body ECU. See BODY CONTROL SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

⁽⁵⁾	Check the door lock motor. See DOOR LOCK MOTOR (DRIVER) , DOOR LOCK MOTOR (PASSENGER) and/or DOOR LOCK MOTOR (REAR) under COMPONENT TESTS.

⁽⁶⁾	Check the door key lock and unlock switch. See DOOR KEY LOCK & UNLOCK SWITCH under COMPONENT TESTS.

⁽⁷⁾	Check the key unlock warning switch. See STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT.

⁽⁸⁾	Check the door courtesy switch. See AUTOMATIC HEADLIGHTS & LIGHTING SYSTEMS article under HEADLIGHTS in ACCESSORIES & EQUIPMENT.

⁽⁹⁾	Check the luggage compartment door opener switch. See LUGGAGE COMPARTMENT DOOR OPENER MOTOR under COMPONENT TESTS.

⁽¹⁰⁾	Check the back door opener switch. See BACK DOOR OPENER SWITCH under COMPONENT TESTS.

⁽¹¹⁾	Check the back door opener motor. See BACK DOOR OPENER MOTOR under COMPONENT TESTS.

Inspect the power door lock system circuits. See CIRCUIT TESTS .
After repairs have been completed, confirm that problem has been eliminated. Operate the system under same conditions recorded for original complaint. If problem is no longer present, repair has corrected problem. If problem is still present, further diagnosis and repair is required.