Inspection Procedure 4: The Fog Lamp Indicator does not Illuminate.


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM


If the front fog lamp indicator or rear fog lamp indicator does not illuminate normally, connector(s), wiring harness in the CAN bus lines, the ETACS-ECU or the combination meter may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check the front fog lamps or rear fog lamp.


Check that the front fog lamps or rear fog lamp illuminate normally.

Q. Is the headlamps in good condition?

Go to Step 2.

Refer to Inspection Procedure 1 "The front fog lamps do not illuminate normally ." or Inspection Procedure 3 "The rear fog lamps do not illuminate normally ."

STEP 2. M.U.T.-III CAN bus diagnostics


Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 3.

Repair the CAN bus line (Refer to GROUP 54D - Troubleshooting ).

STEP 3. M.U.T.-III actuator test


Perform the actuator test for the combination meter, and check that the front fog lamp indicator and rear fog lamp illuminates (Refer to Combination Meter - Troubleshooting ).

Q. Is the check result normal?

Replace the ETACS-ECU.

Replace the combination meter.