CAUTIONCOMMENTS ON TROUBLE SYMPTOM
If any of the headlamps do not illuminate, the wiring harness connector(s), the bulb or the fuse may be defective or burned out.POSSIBLE CAUSES
- Malfunction of the headlamp bulbs
- Malfunction of the high-beam indicator bulb
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 3. Measure the resistance at A-30 <low-beam, RH>, A-43 <high-beam, RH>, A-15 <low-beam, LH>
or A-39 <high-beam, LH> headlamp connector or C-05 <high-beam indicator>
combination meter connector.
- Disconnect the connector, and measure at the wiring harness side.
- Check the resistance between the lamp connector and body earth.
- Resistance between A-15 <low-beam, left> headlamp connector terminal No.3 and body earth
- Resistance between A-39 <high-beam, left> headlamp connector terminal No.2 and body earth
- Resistance between A-30 <low-beam, right> headlamp connector terminal No.3 and body earth
- Resistance between A-43 <high-beam, right> headlamp connector terminal No.2 and body earth
- Resistance between C-05 <high-beam indicator lamp> combination meter connector terminal No.8 and body earth
OK: 2 Ω
or less
Q: Is the check result normal?
YES:
Go to Step 5
.NO: Go to Step 4
.Step 4. Check the wiring harness from A-30 <low-beam, RH>, A-15 <low-beam, LH>
headlamp connector terminal No.3 or A-43 <high-beam, RH>, A-39 <high-beam, LH> headlamp connector terminal No.2 or C-05 combination meter connector terminal No.8 <high-beam indicator lamp>
to body earth.
NOTE: Prior to the wiring harness inspection, check intermediate connector C-116 <high-beam indicator [2400 (4G64) or 2400 (4G69-vehicles for Argentina)]>, and repair if necessary.
- Check the earth wires for open circuit.
Q: Is the check result normal?
YES:
Go to Step 7.NO: Repair the wiring harness.
Step 6. Check the wiring harness from A-30 <low-beam, RH>, A-15 <low-beam, LH>
headlamp connector terminal No.2 or A-43 <high-beam, RH>, A-39 <high-beam, LH> headlamp connector terminal No.1 or C-05 combination meter connector terminal No.9 <high-beam indicator lamp>
to A-11X front-ECU connector terminal No.6 <low-beam>
or No.10 <high-beam or high-beam indicator lamp>.
NOTE: Prior to the wiring harness inspection, check intermediate connector C-116 <high-beam indicator>, and repair if necessary.
- Check the output lines for open circuit.
Q: Is the check result normal?
YES:
Go to Step 7.NO: Repair the wiring harness.
Step 7. Retest the system.
Q: Is the check result normal?
The lamps illuminate normally at both high and low beams.:
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How to Cope with Intermittent Malfunction 
).When the headlamps do not illuminate: Replace the headlamp socket.
When the high-beam indicator lamp does not illuminate: Replace the combination meter.