HID Lamp System Troubleshooting



Never turn on the combination light switch before fitting the HID bulbs to their bulb sockets and completing the reassembly of the headlight assembly.


1.Check the No. 12 (15A) and No. 13 (15A) fuses in the under-hood fuse/relay box.

Are the fuses OK?


YES - Go to 2.


NO - Replace the fuse(s), and recheck.n


2.Remove the front bumper.

3.Substitute a known-good HID bulb and recheck.

Does the headlight come on?


YES - Replace the original HID bulb.n


NO - Go to 4.


4.Disconnect the 2P connector from the inverter unit.

5.Turn the combination light switch ON.

6.Measure voltage between the No. 2 terminal of the inverter unit 2P connector and body ground.

 

Is there battery voltage?


YES - Go to 7.


NO - Go to 9.


7.Turn the combination light switch OFF.

8.Check for continuity between the No. 1 terminal of the inverter unit 2P connecter and body ground.

 

Is there continuity?


YES - Substitute a known-good inverter unit, and recheck. If the symptom/indication goes away, replace the original inverter unit.n


NO - Repair open in the wire between the inverter unit and body ground. If the wire is OK, check for poor ground at G203 or G301.n


9.Check for voltage between the combination light switch connector No.1 terminal and body ground.

Is there battery voltage?


YES - Repair an open in the wire between the HID relay and inverter unit.n


NO - Go to 9.


10.Remove the left and right HID relays from under the dashboard, and test the relays.

Are relays OK?


YES - Repair an open in the wire between the HID relay and inverter unit.n


NO - Replace the faulty relay and recheck.n