Inspection Procedure 3: The Front Fog Lamp Indicator does not Illuminate Normally.

caution

Whenever the ECU is replaced, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM

If the front 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

Malfunction of the ETACS-ECU
Malfunction of the combination meter
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the front fog lamps

When the front fog lamp switch is operated, check that the front fog lamps illuminate/go off normally.

Q. Is the check result normal?

Go to Step 2.

First, repair the front fog lamps (Refer to trouble symptom chart

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 54C - Troubleshooting

STEP 3. M.U.T.-III diagnosis code

Check if diagnosis code is set to the ETACS-ECU.

Q. Is the diagnosis code set?

Troubleshoot the ETACS-ECU. Refer to

Go to Step 4.

STEP 4. M.U.T.-III other system actuator test

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

Q. Is the check result normal?

Replace the ETACS-ECU.

Replace the combination meter.