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



PROBABLE CAUSES



  • Damaged electric tailgate buzzer
  • Damaged electric tailgate control unit
  • Damaged wiring harness and connectors

DIAGNOSIS PROCEDURE


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




  • Item 4: Warning buzzer

Q. Is the check result normal?





STEP 2. Electric tailgate buzzer inspection



Q. Is the check result normal?





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?





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


Q. Is the check result normal?





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?





STEP 6. System retest



Q. Is the check result normal?