Inspection Procedure 2: One of the front fog lamps does not illuminate.


COMMENTS ON TROUBLE SYMPTOM


When one of the front fog lamps does not illuminate, the wiring harness, connector(s), or bulb(s) may have a problem, or the fuse may be burned out.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Bulb check


Check the bulb(s) of the lamp that does not illuminate.

Q. Is the check result normal?

Go to Step 2.

Replace the bulb(s) of the lamp that does not illuminate.

STEP 2. Resistance measurement at the front fog lamp (LH) connector, front fog lamp (RH) connector (earth terminal).


(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.

  • Measure the resistance between the front fog lamp (LH) connector (earth terminal) and body earth.
  • Measure the resistance between the front fog lamp (RH) connector (earth terminal) and body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 4.

Go to Step 3.

STEP 3. Check of open circuit in earth line between the front fog lamp (LH) connector, front fog lamp (RH) connector and body earth.


Q. Is the check result normal?

Go to Step 5.

Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in output line between the front fog lamp relay connector and front fog lamp (LH), front fog lamp (RH) connector.


Q. Is the check result normal?

Go to Step 5.

Repair the connector(s) or wiring harness.

STEP 5. Retest the system


Check that the front fog lamps illuminate normally.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Go to Step 1.