Component Tests and General Diagnostics

1. Turn ignition switch to on position, turn lighting switch to off position.
2. Cover the sensor lens of Auto-on headlight controller (1) with a hand and check headlights come on after 20 seconds. If headlights do not come on, go to step 4).




3. Light the sensor lens of Auto-on headlight controller (1) with a light (2) and check headlights go out after 20 seconds. If headlights do not go out, go to step 4).
If check result of step 1) to 3) is OK, this system is OK.




4. Disconnect coupler (1) from Auto-on headlights controller with ignition switch "OFF".
5. Check the voltage between terminals are as follows. If check result is not satisfactory, repair and recheck.

Auto-on headlight system circuit specification (voltage):
Terminal G34-6 and G34-1 (Ignition switch "OFF") : 0 V
Terminal G34-6 and G34-1 (Ignition switch ON) : 10 - 14 V
Terminal G34-6 and G34-4 : 10 - 14 V
Terminal G34-6 and G34-5 : 10 - 14 V

6. If check result of step 5) is OK, replace controller and recheck.