INSPECTION PROCEDURE 8: Driver’s Door Unlock Sensor does not Work. <LH Drive Vehicles>


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






PROBABLE CAUSES



DIAGNOSTIC PROCEDURE


STEP 1. M.U.T.-III diagnosis code


Check whether a KOS-related diagnosis code is set.

Q. Is the diagnosis code set?

Refer to .

Go to Step 2.

STEP 2. Connector check: C-104 KOS-ECU connector, E-19 Unlock sensor (front door: LH) connector


Q. Is the check result normal?

Go to Step 3.

Repair the defective connector.

STEP 3. Check the wiring harness between the C-104 KOS-ECU connector terminal Nos. 24, 36 and the E-19 unlock sensor (front door: LH) connector terminal Nos. 4, 2 and between the E-19 unlock sensor (front door: LH) connector terminal No. 6 and the earth.



note Before the wiring harness check, check the intermediate connectors C-128 and C-129, and repair if necessary.

Q. Is the check result normal?

Go to Step 4.

Repair the wiring harness.

STEP 4. KOS communication test


Using M.U.T.-III, perform the antenna communication test to check that the exterior transmitter antenna (driver’s side) communicates normally (Refer to ).

Q. Is the check result normal?

Go to Step 5.

Perform troubleshooting for the diagnosis code No. B240A (Refer to ).

STEP 5. After the unlock sensor (front door: LH) is replaced, check trouble symptom.


Operate the unlock sensor (front door: LH) and check that the door and tailgate can be unlocked.

Q. Is the check result normal?

The diagnosis is complete.

Replace KOS-ECU and register the ID codes (Refer to ).