Inspection Procedure A-2: A Door cannot be Locked or Unlocked by the Central Door Locking System <LH drive vehicles>.




COMMENT ON TROUBLE SYMPTOM
If a door cannot be locked or unlocked by the central door locking system, the door lock actuator may be defective.

PROBABLE CAUSES

  • Malfunction of the door lock actuator
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Confirm which door lock actuator is defective.

Q. Which door fails to lock correctly?
Driver’s door : Go to Step 2.
Front passenger’s door : Go to Step 6.
Rear right door <Double cab> : Go to Step 10.
Rear left door <Double cab> : Go to Step 14.

STEP 2. Connector check: E-15 front door lock actuator (LH) connector

Q. Is the check result normal?

Go to Step 3.

Repair the defective connector.

STEP 3. Check the front door lock actuator (LH)
Check that the front door lock actuator (LH) works normally. Refer to .

Q. Is the check result normal?
Go to Step 4.
Replace the front door lock actuator (LH).

STEP 4. Connector check: C-220 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 5.

Repair the defective connector.

STEP 5. Check the wiring harness from C-220 ETACS-ECU connector terminal Nos. 21 and 23 to E-15 front door lock actuator (LH) connector terminal Nos. 6 and 4.




note Prior to the wiring harness inspection, check intermediate connector C-122 and junction block connector C-32, and repair if necessary.

  • Check the input and output lines for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

STEP 6. Connector check: E-04 front door lock actuator (RH) connector

Q. Is the check result normal?

Go to Step 7.

Repair the defective connector.

STEP 7. Check the front door lock actuator (RH).
Check that the front door lock actuator (RH) works normally. Refer to .

Q. Is the check result normal?
Go to Step 8.
Replace the front door lock actuator (RH).

STEP 8. Connector check: C-220 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 9.

Repair the defective connector.

STEP 9. Check the wiring harness from C-220 ETACS-ECU connector terminal Nos. 22 and 23 to E-04 front door lock actuator (RH) connector terminal Nos. 6 and 4.



note Prior to the wiring harness inspection, check intermediate connector C-133 and junction block connector C-32, and repair if necessary.

  • Check the input and output lines for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

STEP 10. Connector check: E-07 rear door lock actuator (RH) connector

Q. Is the check result normal?

Go to Step 11.

Repair the defective connector.

STEP 11. Check the rear door lock actuator (RH).
Check that the rear door lock actuator (RH) is in good condition. Refer to .

Q. Is the check result normal?
Go to Step 12.
Replace the tailgate lock actuator.

STEP 12. Connector check: C-220 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 13.

Repair the defective connector.

STEP 13. Check the wiring harness from C-220 ETACS-ECU connector terminal Nos. 22 and 23 to E-07 rear door lock actuator (RH) connector terminal Nos. 6 and 4.





note Prior to the wiring harness inspection, check intermediate connectors C-16, D-24 and junction block connector C-32, and repair if necessary.

  • Check the input and output lines for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

STEP 14. Connector check: E-12 rear door lock actuator (LH) connector

Q. Is the check result normal?

Go to Step 15.

Repair the defective connector.

STEP 15. Check the rear door lock actuator (LH).
Check that the rear door lock actuator (LH) is in good condition. Refer to .

Q. Is the check result normal?
Go to Step 16.
Replace the tailgate lock actuator.

STEP 16. Connector check: C-220 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 17.

Repair the defective connector.

STEP 17. Check the wiring harness from C-220 ETACS-ECU connector terminal Nos. 22 and 23 to E-12 rea door lock actuator (LH) connector terminal Nos. 6 and 4.





note Prior to the wiring harness inspection, check intermediate connectors C-16, D-14 and junction block connector C-32, and repair if necessary.

  • Check the input and output lines for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.