Inspection Procedure
8: The lock switch and open switch of the tailgate lock release handle do not work.
caution
Before replacing the ECU,
ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
PROBABLE CAUSES
Malfunction of the outside transmission antenna assembly
(tailgate)
Malfunction of the tailgate lock release handle
Damaged wiring harness and connectors
Malfunction of the KOS-ECU
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 (lock switch and open switch)
check
Check that the tailgate lock release handle (lock switch and 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 open circuit in earth line between the tailgate lock
release handle connector and the body earth.
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 and check that the tailgate can be locked and
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 ).