Inspection Procedure 12: Front Passenger’s Door Unlock Sensor does not Work. <LH Drive Vehicles>


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








PROBABLE CAUSES



  • Malfunction of the exterior transmitter antenna assembly (front passenger’s side)
  • Malfunction of the unlock switch (front door: RH)
  • Damaged wiring harness and connectors
  • Malfunction of the KOS-ECU

DIAGNOSTIC PROCEDURE


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



Q. Is the diagnosis code set?





STEP 2. Connector check: C-104 KOS-ECU connector, E-06 unlock sensor (front door: RH) connector


Q. Is the check result normal?





STEP 3. Check the wiring harness between the C-104 KOS-ECU connector terminal Nos. 25, 36 and the E-06 unlock sensor (front door: RH) connector terminal Nos. 4, 2, and between the E-06 unlock sensor (front door: RH) connector terminal No. 6 and the earth.



  • Check the signal and earth wires for open circuit.
note Before the wiring harness inspection, inspect the intermediate connectors C-113and C-114, and repair them if necessary.

Q. Is the check result normal?





STEP 4. KOS communication test



Q. Is the check result normal?





STEP 5. After the unlock sensor (front door: RH) is replaced, check trouble symptom.



Q. Is the check result normal?