42A-SOME DOORS DO NOT LOCK OR UNLOCK

INSPECTION PROCEDURE A-4: A Door or a Liftgate cannot be Locked or Unlocked by the Central Door Locking System.

caution

Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

CIRCUIT OPERATION

The ETACS-ECU operates the central door locking system according to the following signals:

Door lock actuator switch
Door lock switch, which is incorporated in the power window main switch or front power window sub switch

The ETACS-ECU locks or unlocks all doors by operating the central door lock relay (incorporated in the ECU) in response to input signals.

TECHNICAL DESCRIPTION (COMMENT)

The wiring harness between the ETACS-ECU and the door lock actuator may be defective.

TROUBLESHOOTING HINTS

The door lock actuator(s) may be defective
The liftgate lock actuator may be defective
The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
The ETACS-ECU may be defective

DIAGNOSIS

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

Which door or liftgate is not operating normally?

Driver's door : Go to Step 2

Front passenger's door : Go to Step 6

Rear right door : Go to Step 10

Rear left door : Go to Step 14

Liftgate : Go to Step 18

STEP 2. Check front door lock actuator (LH) connector F-14 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is the front door lock actuator (LH) connector F-14 in good condition?

Go to Step 3

Repair or check the connector. Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 3. Check the front door lock actuator (LH).

Check the front door lock actuator (LH). Refer to

Claw position	Door inside handle lock knob position	Battery connection	Door inside handle lock knob operation
Full-latch	Lock	Connect terminal 1 to negative battery terminal. Connect terminal 2 to positive battery terminal.	Knob moves from "Lock" to "Unlock" position.
Full-latch	Unlock	Connect terminal 1 to positive battery terminal. Connect terminal 2 to negative battery terminal.	Knob moves from "Unlock" to "Lock" position.

Does the front door lock actuator (LH) work normally?

Go to Step 4

Replace the front door lock actuator (LH). Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 4. Check ETACS-ECU connector C-415 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is ETACS-ECU connector C-415 in good condition?

Go to Step 5

Repair or check the connector. Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 5. Check the wiring harness between ETACS-ECU connector C-415 (terminals No. 2 and 6) and front door lock actuator (LH) connector F-14 (terminals No. 2 and 1).

Check the power supply lines for open circuit and short circuit.

note	Also check intermediate connector C-224 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-224 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .

Is the wiring harness between ETACS-ECU connector C-415 (terminals No. 2 and 6) and front door lock actuator (LH) connector F-14 (terminals No. 2 and 1) in good condition?

Go to Step 24

The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair or replace the damaged component(s). Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 6. Check front door lock actuator (RH) connector F-06 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is front door lock actuator (RH) connector F-06 in good condition?

Go to Step 7

Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 7. Check the front door lock actuator (RH).

Check the front door lock actuator (RH). Refer to

Claw position	Door inside handle lock knob position	Battery connection	Door inside handle lock knob operation
Full-latch	Lock	Connect terminal 4 to negative battery terminal. Connect terminal 3 to positive battery terminal.	Knob moves from "Lock" to "Unlock" position.
Full-latch	Unlock	Connect terminal 4 to positive battery terminal. Connect terminal 3 to negative battery terminal.	Knob moves from "Unlock" to "Lock" position.

Is the front door lock actuator (RH) normal?

Go to Step 8

Replace the front door lock actuator (RH). Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 8. Check ETACS-ECU connector C-415 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is ETACS-ECU connector C-415 in good condition?

Go to Step 9

Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 9. Check the wiring harness between ETACS-ECU connector C-415 (terminals No. 5 and 6) and front door lock actuator (RH) connector F-06 (terminals No. 3 and 4).

Check the power supply lines for open circuit and short circuit.

note	Also check intermediate connector C-211 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-211 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .

Is the wiring harness between ETACS-ECU connector C-415 (terminals No. 5 and 6) and front door lock actuator (RH) connector F-06 (terminals No. 3 and 4) in good condition?

Go to Step 24

The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 10. Check rear door lock actuator (RH) connector F-18 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is rear door lock actuator (RH) connector F-18 in good condition?

Go to Step 11

Repair or check the connector. Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors can be locked and unlocked normally.

STEP 11. Check the rear door lock actuator (RH).

Check the rear door lock actuator (RH). Refer to

Claw position	Door inside handle lock knob position	Battery connection	Door inside handle lock knob operation
Full-latch	Lock	Connect terminal 4 to negative battery terminal. Connect terminal 3 to positive battery terminal.	Knob moves from "Lock" to "Unlock" position.
Full-latch	Unlock	Connect terminal 4 to positive battery terminal. Connect terminal 3 to negative battery terminal.	Knob moves from "Unlock" to "Lock" position.

Is the rear door lock actuator (RH) normal?

Go to Step 12

Replace the rear door lock actuator (RH). Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 12. Check ETACS-ECU connector C-413 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is ETACS-ECU connector C-413 in good condition?

Go to Step 13

Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 13. Check the wiring harness between ETACS-ECU connector C-413 (terminals No. 6 and 9) and rear door lock actuator (RH) connector F-18 (terminals No. 3 and 4).

Check the power supply lines for open circuit and short circuit.

note	Also check intermediate connector F-21 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-21 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .

Is the wiring harness between ETACS-ECU connector C-413 (terminals No. 6 and 9) and rear door lock actuator (RH) connector F-18 (terminals No. 3 and 4) in good condition?

Go to Step 24

STEP 14. Check rear door lock actuator (LH) connector F-25 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is rear door lock actuator (LH) connector F-25 in good condition?

Go to Step 15

Repair or check the connector. Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 15. Check the rear door lock actuator (LH).

Check the rear door lock actuator (LH). Refer to

Claw position	Door inside handle lock knob position	Battery connection	Door inside handle lock knob operation
Full-latch	Lock	Connect terminal 1 to negative battery terminal. Connect terminal 2 to positive battery terminal.	Knob moves from "Lock" to "Unlock" position.
Full-latch	Unlock	Connect terminal 1 to positive battery terminal. Connect terminal 2 to negative battery terminal.	Knob moves from "Unlock" to "Lock" position.

Is the rear door lock actuator (LH) normal?

Go to Step 16

Replace the rear door lock actuator (LH). Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 16. Check ETACS-ECU connector C-413 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is ETACS-ECU connector C-413 in good condition?

Go to Step 17

Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 17. Check the wiring harness between ETACS-ECU connector C-413 (terminals No. 6 and 9) and rear door lock actuator (LH) connector F-25 (terminals No. 2 and 1).

Check the power supply lines for open circuit and short circuit.

note	Also check intermediate connector F-22 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-22 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .

Is the wiring harness between ETACS-ECU connector C-413 (terminals No. 6 and 9) and rear door lock actuator (LH) connector F-25 (terminals No. 2 and 1) in good condition?

Go to Step 18

STEP 18. Check liftgate lock actuator connector G-10 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is liftgate lock actuator connector G-10 in good condition?

Go to Step 19

Repair or check the connector. Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 19. Check the liftgate lock actuator.

Remove the liftgate lock actuator (Refer to

Lever position	Battery connection	Lever operation
At the "SET" position	Connect terminal 2 to negative battery terminal. Connect terminal 1 to positive battery terminal.	Lever moves from "SET" to "OPEN" position.

Is the liftgate lock actuator normal?

Go to Step 20

Replace the liftgate lock actuator. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 20. Check the ground circuit to the liftgate lock actuator. Measure the resistance at liftgate lock actuator connector G-10.

(1) Disconnect liftgate lock actuator connector G-10 and measure the resistance on the wiring harness side of the connector.

(2) Measure the resistance value between terminal 2 and ground.

The resistance should be 2 ohms or less.

Is the measured resistance 2 ohms or less?

Go to Step 21

Go to Step 22

STEP 21. Check the wiring harness between liftgate lock actuator connector G-10 (terminal No. 2) and ground.

Check the ground line for open circuit and short circuit.

note	Also check intermediate connector G-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector G-23 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .

Is the wiring harness between liftgate lock actuator connector G-10 (terminal No. 2) and ground in good condition?

No action is necessary and testing is complete.

STEP 22. Check ETACS-ECU connector C-413 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Is ETACS-ECU connector C-413 in good condition?

Go to Step 23

Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection

. Verify that all the doors and the liftgate can be locked and unlocked normally.

STEP 23. Check the wiring harness between ETACS-ECU connector C-413 (terminal No. 1) and liftgate lock actuator connector G-10 (terminal No. 1).

Check the signal line for open circuit and short circuit.

note	Also check intermediate connectors G-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors G-23 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .

Is the wiring harness between ETACS-ECU connector C-413 (terminal No. 1) and liftgate lock actuator connector G-10 (terminal No. 1) in good condition?

Go to Step 24

STEP 24. Retest the system.

Check that the central door locking system works normally.

Is the check result normal?

No action is necessary and testing is complete.

Replace the ETACS-ECU. Check that the central door locking system normally.