Step 1. Check that the headlamps operate.

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

Q: Is the check result normal?

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

Step 2. Pulse check

Check the input signal from the passing switch.

System switch	Check conditions
Passing lamp switch	When the passing switch is turned from off to on

OK: The MUT-II/III sounds or the voltmeter needle fluctuates.

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.