Inspection Procedure 10: Driver’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 (driver’s side)
- Malfunction of the unlock sensor (front door: LH)
- 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-19 Unlock sensor (front door: LH) connector
Q.
Is the check result normal?
STEP 3. Check the wiring harness between the C-104 KOS-ECU connector terminal Nos. 24, 36 and the E-19 unlock sensor (front door: LH) connector terminal Nos. 4, 2 and between the E-19 unlock sensor (front door: LH) connector terminal No. 6 and the earth.
- Check the signal and earth wires for open circuit.
note | Before the wiring harness check, check the intermediate connectors C-128 and C-129, and repair if necessary. |