Inspection Procedure A-11: Alarm does not sound normally when electric tailgate works automatically.



caution Before replacing the ECU, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM


The wiring harness or its connector(s) between the electric tailgate buzzer and the electric tailgate control unit, the electric tailgate buzzer itself or the electric tailgate control unit itself may be defective.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III actuator test


Perform the actuator test, and check that the electric tailgate buzzer sounds.

Q. Is the check result normal?

Go to Step 6.

Go to Step 2.

STEP 2. Electric tailgate buzzer inspection


Check the electric tailgate buzzer. Refer to .

Q. Is the check result normal?

Go to Step 3.

Replace the electric tailgate buzzer.

STEP 3. Resistance measurement at electric tailgate buzzer connector


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between buzzer connector and body earth.
OK: 10 Ω or less

Q. Is the check result normal?

Go to Step 5.

Go to Step 4.

STEP 4. Check of open circuit in earth line between electric tailgate buzzer connector and body earth.


Q. Is the check result normal?

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

Repair the connector(s) or wiring harness.

STEP 5. Check of short to power supply, short to earth, and open circuit in BZ+ line between electric tailgate control unit connector and electric tailgate buzzer connector.


Q. Is the check result normal?

Go to Step 6.

Repair the connector(s) or wiring harness.

STEP 6. System retest


Check whether the warning operates normally when the electric tailgate is operated.

Q. Is the check result normal?

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

Replace the electric tailgate control unit.