INSPECTION PROCEDURE A-3: Door(s) or a tailgate cannot be locked or unlocked by central door locking system.


COMMENTS ON TROUBLE SYMPTOM


No operation of the door lock actuator or a malfunction of the tailgate lock actuator is suspected.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Confirmation of the defective door lock actuator or tailgate lock actuator.


Q. Which doors or tailgate is not locked normally?

Front left door : Go to Step 2.

Front right door : Go to Step 4.

Rear left door : Go to Step 6.

Rear right door : Go to Step 8.

Tailgate <Vehicles without electric tailgate> : Go to Step 10.

Tailgate <Vehicles with electric tailgate> : Diagnose the tailgate. Refer to GROUP 42A - Tailgate .

STEP 2. Front door lock actuator (LH) check


Check that the front door lock actuator (LH) works normally. Refer to Door Latch Assembly Inspection .

Q. Is the check result normal?

Go to Step 3.

Replace the front door lock actuator (LH).

STEP 3. Check of short to power supply, short to earth, and open circuit in DUN, DLK1&DLK2 line between ETACS-ECU connector and front door lock actuator (LH) connector.


Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the connector(s) or wiring harness.

STEP 4. Front door lock actuator (RH) check


Check that the front door lock actuator (RH) works normally. Refer to Door Latch Assembly Inspection .

Q. Is the check result normal?

Go to Step 5.

Replace the front door lock actuator (RH).

STEP 5. Check of short to power supply, short to earth, and open circuit in DUL2, DLK1&DLK2 line between ETACS-ECU connector and front door lock actuator (RH) connector.


Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the connector(s) or wiring harness.

STEP 6. Rear door lock actuator (LH) check


Check that the rear door lock actuator works normally. Refer to Door Latch Assembly Inspection .

Q. Is the check result normal?

Go to Step 7.

Replace the rear door lock actuator (LH).

STEP 7. Check of short to power supply, short to earth, and open circuit in DUL3&DUL4, DLK3&DLK4 line between ETACS-ECU connector and rear door lock actuator (LH) connector.


Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the connector(s) or wiring harness.

STEP 8. Rear door lock actuator (RH) check


Check that the rear door lock actuator (RH) is in good condition. Refer to Door Latch Assembly Inspection .

Q. Is the check result normal?

Go to Step 9.

Replace the rear door lock actuator (RH).

STEP 9. Check of short to power supply, short to earth, and open circuit in DUL3&DUL4, DLK3&DLK4 line between ETACS-ECU connector and rear door lock actuator (RH) connector.


Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the connector(s) or wiring harness.

STEP 10. Tailgate lock actuator check.


Check that the tailgate lock actuator is in good condition. Refer to .

Q. Is the check result normal?

Go to Step 11.

Replace the tailgate lock actuator.

STEP 11. Resistance measurement at tailgate lock actuator connector (earth line terminal).


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the tailgate lock actuator connector (earth line terminal) and body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 13.

Go to Step 12.

STEP 12. Check of open circuit in earth line between tailgate lock actuator connector and body earth.


Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the connector(s) or wiring harness.

STEP 13. Check of open circuit in GLK line between ETACS-ECU connector and tailgate lock actuator connector.


Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the connector(s) or wiring harness.