Step 1. Check the operation of the headlamps.

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

Q: Is the check result normal?

YES:  Go to Step 2.
NO:  Refer to inspection procedure K-3 "The low-beam headlamps do not illuminate normally ." Or refer to inspection procedure K-4 "The high-beam headlamps do not illuminate normally ."

Step 2. Confirm communication data by using the SWS monitor.

Check the ETACS-ECU signals which are related to the headlamps.

<Selected item> COLUMN ECU

• Passing lamp switch: ON

Item No.	Item name	Normal conditions
Item 03	PASSING SW	ON

OK: Normal condition is displayed.

Q: Is the check result normal?

YES:  Go to Step 3.
NO:  Refer to inspection procedure P-5 "The column switch (lighting and turn-signal lamp switch) signal is not received" .

Step 3. Retest the system.

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

Q: Is the check result normal?

YES:  The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO:  Replace the front-ECU.