Inspection Procedure 5: Any of the Headlamp(s) do 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-54 <LO (RH)>, A-37 <LO (LH)> headlamp assembly connector, A-55 <HI (RH)>, A-38 <HI (LH)> headlamp (HI) connector
Q.
Is the check result normal?


STEP 2. Bulb check
note | If discharge-type lower 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-54 <LO (RH)>, A-37 <LO (LH)> headlamp assembly connector or A-55 <HI (RH)>, A-38 <HI (LH)> headlamp (HI) 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-54 <LO (RH)>, A-37 <LO (LH)> headlamp assembly connector terminal No. 8 <Halogen headlamp> / terminal No. 9 <Discharge headlamp>, or A-55 <HI (RH)>, A-38 <HI (LH)> headlamp connector terminal No. 2 and the body earth
- Check the earth wires for open circuit.
Q.
Is the check result normal?



STEP 5. Wiring harnesses check between A-54 <LO (RH)>, A-37 <LO (LH)> headlamp assembly connector terminal No. 2 <Halogen headlamp> / terminal No. 3 <Discharge headlamp>, or A-55 <HI (RH)>, A-38 <HI (LH)> headlamp connector terminal No. 1 and the A-28X <LO> or A-20X <HI> headlamp relay connector terminal No. 3
- Check the power supply line for open circuit.
Q.
Is the check result normal?

