Troubleshooting Strategy
TROUBLESHOOTING STRATEGYWARNING: Do not touch the socket and the connector while the headlights are on. High voltage current is flowing in the socket and the connector while the headlights are on. If you tail to handle them correctly, serious injury or damage may be caused.
WARNING Do not attempt to use a tester to check them. If a tester is used, serious injury or damage may be caused by high-voltage current.
WARNING: Do not turn on the headlights while the controller or the bulb is removed. If the headlights are turned on while the controller or the bulb is removed, serious injury or damage may be caused.
WARNING: Before service work, ensure that the battery terminal and the controller connector is disconnected. Do not touch the components with wet hands. It you work on the components with wet hands or in wet conditions, sedous injury may be caused.
CAUTION: Do not illuminate the bare headlight bulb. If the headlight bulb illuminates without filling it in the headlight unit, it may burst due to rise in its internal pressure.
CAUTION: If the discharge headlight is damaged, strictly observe "How to check discharge headlight components." If you fail to observe "How to check discharge headlight components," the vehicle may be damaged.
HOW TO CHECK DISCHARGE HEADLIGHT COMPONENTS.
VISUAL CHECK OF THE CONTROLLER (CASE)
If any of the defects mentioned are found, replace the controller.
CHECK THE WIRING HARNESS BETWEEN THE CONTROLLER AND THE BULB.
If any of the defects below are found, replace the wiring harness between the controller and the bulb.
CAUTION: If the wiring harness between the controller and the bulb is defective, always replace it. Attempting to repair the wiring harness may cause a melted harness wire.
CHECKING WHILE THE HEADLIGHTS ARE ON
If any of the defects below are found, replace the controller.
WARNING: While the headlights are on, do not touch the headlight bulbs. There is a high risk of scalding, as the headlight bulb will become extremely hot.
NOTE: Ensure that the headlight control system and its circuit (power supply control at engine start and during steady illumination, high-voltage generating circuit, etc.) are working normally Then check whether internal breakage has occurred in the controller. However, some internal breakage may not be able to be found.
HOW TO DIAGNOSE THE DISCHARGE HEADLIGHTS
1. Check that the connectors are connected securely and the fuse has not been blown.
2. Before starting the diagnosis, read through the "Symptom chart" to understand what and how you should do. Follow all the procedures carefully.
3. The components should be checked with their connectors disconnected.