Inspection Procedure 10: The open switch of the tailgate lock release handle does not perform the unlocking operation.



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


PROBABLE CAUSES




DIAGNOSIS PROCEDURE


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


Check if any diagnosis code is set to the KOS-ECU.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 2.

STEP 2. Tailgate lock release handle (open switch) check


Check that the tailgate lock release handle (open switch) is normal (Refer to GROUP 42A - Tailgate Handle and Latch <Vehicles without electric tailgate> or <Vehicles with electric tailgate>).

Q. Is the check result normal?

Go to Step 3.

Replace the tailgate lock release handle.

STEP 3. Check of short to power supply, short to earth, and open circuit in GTOP line between the KOS-ECU connector and the tailgate lock release handle connector.


note Before the wiring harness check, check the intermediate connector, 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 outside transmission antenna assembly (tailgate) communicates normally (Refer to ).

Q. Is the check result normal?

Go to Step 5.

Perform troubleshooting for the diagnosis code No. B240C (Refer to ).

STEP 5. Check of the troubles


Operate the tailgate lock release handle (open switch) to check that the tailgate can be opened.

Q. Is the check result normal?

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

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