Inspection Procedure 9: Driver’s Door Lock Switch does not Work. <RH 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 lock switch (front: 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-07 Lock switch (front: RH) connector
Q.
Is the check result normal?
STEP 3. Check the wiring harness between the C-104 KOS-ECU connector terminal No. 21 and the E-07 lock switch (front: RH) connector terminal No. 1, and between the E-07 lock switch (front: RH) connector terminal No. 2 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. |