Inspection Procedure 20: Outer Buzzer does not Sound.


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










OPERATION




  • When the door is locked or unlocked with the keyless or keyless operation function
  • Door lock does not operate.
  • The keyless operation key is brought out of the vehicle.

PROBABLE CAUSES



  • Malfunction of the antenna and outer buzzer assembly
  • Malfunction of the KOS-ECU
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE


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



Q. Is the diagnosis code set?





STEP 2. M.U.T.-III actuator test



Q. Is the check result normal?





STEP 3. Connector check: F-16 outer buzzer connector, C-104 KOS-ECU connector


Q. Is the check result normal?





STEP 4. Check the wiring harness between the F-16 outer buzzer connector terminal Nos. 1, 2 and the C-104 KOS-ECU connector terminal Nos. 35, 37.



  • Check the power supply and earth lines for open circuit.
note Before the wiring harness inspection, inspect the intermediate connectors C-36 and F-22, and repair them if necessary.

Q. Is the check result normal?





STEP 5. Outer buzzer check



Q. Is the check result normal?





STEP 6. Check of the troubles



Q. Is the check result normal?