Inspection Procedure 5: One of the Headlamp(s) does not Illuminate.
| caution | If the discharge type headlamps do not illuminate, fully understand the precautions in "Service precautions for discharge headlamp" before proceeding with the troubleshooting. Refer to  . |
COMMENTS ON TROUBLE SYMPTOM
PROBABLE CAUSES
- Malfunction of the headlamp bulbs
- Malfunction of the headlamp assembly
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-35 (LH) and A-53 (RH) headlamp assembly connector
Q.
Is the check result normal?
STEP 2. Bulb check
| note | If discharge-type low-beam headlamps do not illuminate, their bulbs cannot be inspected. In this case, assume the bulbs to be normal and proceed with steps. |
Q.
Is the check result normal?
STEP 3. Resistance measurement at the A-35 (LH) and A-53 (RH) headlamp assembly connector
| (1)Disconnect the connector, and measure at the wiring harness side. |
(2)Measure the resistance between the connector of lamp which does not illuminate and the body earth.
|
Q.
Is the check result normal?
STEP 4. Wiring harnesses check between the A-35 (LH) and A-53 (RH) headlamp assembly connector terminal No. 6 <Vehicles without discharge headlamp> or terminal No. 5 <Vehicles with discharge headlamp> and the body earth
- Check the earth wires for open circuit.
Q.
Is the check result normal?
STEP 5. Wiring harnesses check between A-35 (LH) and A-53 (RH) headlamp assembly connector terminal No. 2 <Vehicles without discharge headlamp LO> / terminal No. 12 <Vehicles with discharge headlamp LO>, or terminal No. 1 <HI> and the A-28X <LO> or A-19X <HI> headlamp relay connector terminal No. 3
- Check the power supply line for open circuit.
Q.
Is the check result normal?