Inspection Procedure 10: Driver’s door unlock sensor does not work.
| 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 outside transmission antenna assembly (driver’s side)
- Malfunction of the unlock sensor (front door: LH <LHD> or RH <RHD>)
- Damaged wiring harness and connectors
- Malfunction of the KOS-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q.
Is the diagnosis code set?
STEP 2. Connector check: C-23 KOS-ECU connector, E-17 Unlock sensor (front door: LH) <LHD> connector, E-05 Unlock sensor (front door: RH) <RHD> connector
Q.
Is the check result normal?
STEP 3. Check the wiring harness between the C-23 KOS-ECU connector terminal No. 24, 36 and the E-17 unlock sensor (front door: LH) <LHD> connector terminal No. 4, 2 or E-05 unlock sensor (front door: RH) <RHD> connector terminal No. 4, 2 and between the E-17 unlock sensor (front door: LH) <LHD> connector terminal No. 6 or E-05 unlock sensor (front door: RH) <RHD> connector terminal No. 6 and the earth.
- Check the signal and earth wires for open circuit.
| note | Before the wiring harness check, check C-39 joint connector (1), C-111 <RHD>, C-112 <RHD>, C-125 <LHD>, C-126 <LHD> the intermediate connectors, and repair 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 (driver’s side) is replaced, check trouble symptom.
Q.
Is the check result normal?