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


COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of bulbs
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Bulb check



Q. Is the check result normal?





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?





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?





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?





STEP 5. Retest the system



Q. Is the check result normal?