Inspection Procedure 3: The high-beam and low-beam headlamps do not illuminate when the passing switch is operated.


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

COMMENTS ON TROUBLE SYMPTOM


If the low-beam and high-beam headlamps are normal, the passing switch input signal circuit or the ETACS-ECU may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code.


When the ignition switch is turned to the "LOCK" (OFF) position, check that the ETACS-ECU does not set the diagnosis code.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 2.

STEP 2. Check that the headlamps operate.


Check that the low-beam and high-beam headlamps work normally.

Q. Is the check result normal?

Go to Step 3.

Repair the headlamps. Refer to trouble symptom chart .

STEP 3. Retest the system.


When the passing switch is turned on, check if the headlamps 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 ).

Replace the column switch.