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HID Lamp System Troubleshooting

A transient high tension (25,000 V) occurs at the bulb sockets or the high intensity discharge (HID) lamps when the combination light switch is turned ON, it may cause serious electrical shock or electrocution if you do not observe the cautions below.

  • Never turn on the combination light switch before fitting the HID bulbs to their bulb sockets and completing the reassembly of the headlight assembly.
  • Do not service the headlights assembly in wet conditions, such as rain or snow, near a sprinkler system, or when your hands are wet to prevent electrocution.
  • Do not touch the surface of the HID bulbs with your bare hands and do not stain it with any oils and fats.
  • Do not disassemble the inverter unit and the igniter unit.
  • Do not turn on the HID bulb by using a power source other than the battery mounted on your vehicle.

NOTE:
  • Before troubleshooting, check the No. 32 (15 A) fuse and No. 48 (15 A) fuse in the under-dash fuse/relay box.
  • Cool down the HID bulb before checking.
  • After checking, the HID system requires about 5 minutes to be normal condition.
  1. Connect the HDS to the data link connector, then turn the ignition switch to ON (II).
  1. Select the BODY ELECTRICAL menu, then enter the HEADLIGHT COMMAND from the FUNCTIONAL TESTS, and turn the headlights on repeatedly.
Do the headlights come on?
YES -
NO -
Go to Step 3 .
  1. Turn the headlight switch OFF and the ignition switch in LOCK (0) position.
  1. Check for loose or poor connections between the bulb socket and the HID bulb.
Is the connection OK?
YES -
Go to Step 7 .
NO -
Install the bulb and the bulb socket correctly and recheck, then go to Step 15 .
  1. Check for corrosion and traces of electrical arcing at the socket mating part.
Is the socket corroded or burnt?
YES -
Replace the bulb socket, and recheck, then go to Step 15 .
NO -
Go to Step 8 .

  1. Remove the bulb, and check the luminescence part of the HID bulb.
Is there black discoloration or transformation?
YES -
Replace the HID bulb(s), and recheck, then go to Step 15 .
NO -
Go to Step 9 .
  1. Substitute the right and left HID bulbs.
Does the symptom change to the other side?
YES -
Replace the HID bulb and recheck, then go to Step 15 .
NO -
Go to Step 10 .
  1. Turn the combination light switch OFF.
  1. Disconnect the HID unit 2P connector.
  1. Turn the combination light (headlight) switch ON.

  1. Measure the voltage between the No. 2 terminal of the HID unit 2P connector and body ground.
Is there battery voltage?
YES -
Go to Step 14 .
NO -
Repair open in the wire between the HID unit and the under-dash fuse/relay box. If the wire is OK, replace the under-dash fuse/relay box, then go to Step 15 .

  1. Check for continuity between the No. 1 terminal of the HID unit 2P connector and body ground.
Is there continuity?
YES -
Replace the HID unit, then go to Step 15 .
NO -
Repair open in the wire between the HID unit and body ground. If the wire is OK, check for poor ground (G301/G401), then go to Step 15 .