Inspection Procedure 15: 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.
  • Also, with a customisation function, "Buzzer answerback" may be set to "Not Sound Buzzer."

PROBABLE CAUSES



  • Malfunction of the outer buzzer
  • Malfunction of the KOS-ECU
  • Malfunction of the connector
  • Function setting error or no setting with a customisation

DIAGNOSIS PROCEDURE


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



Q. Is the diagnosis code set?





STEP 2. Check the customisation



Q. Is it set to other than "Not Sound Buzzer"?





STEP 3. M.U.T.-III actuator test



Q. Is the check result normal?





STEP 4. Check of short to power supply, short to earth, and open circuit in DRVB, PWRB line between the KOS-ECU connector and the outer buzzer connector.


note Before the wiring harness check, check the intermediate connector, and repair if necessary.

Q. Is the check result normal?





STEP 5. Check of the troubles



Q. Is the check result normal?