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. Connector check: G-15 Outer buzzer connector, C-08, C-10 KOS-ECU connector


Q. Is the check result normal?





STEP 5. Check the wiring harness between the G-15 outer buzzer connector terminal No. 1 and the C-08 KOS-ECU connector terminal No. 33, between the G-15 outer buzzer connector terminal No. 2 and the C-10 KOS-ECU connector terminal No. 5.



  • Check the power supply line for open and short circuit, the signal lines for open circuit.
note Before the wiring harness inspection, inspect the C-26, C-27, G-20 intermediate connectors, and repair them if necessary.

Q. Is the check result normal?





STEP 6. Check of the troubles



Q. Is the check result normal?