Headlamp: Testing and Inspection
HID Lamp System TroubleshootingCAUTION: 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. 1 (15 A) and No. 6 (15 A) fuses in the under-hood fuse/relay box.
Are the fuses OK?
YES - Go to step 2.
NO - Replace the fuse(s), and recheck.
2. Substitute a known-good HID bulb and recheck.
Does the headlight low beam come on?
YES - Replace the original HID bulb.
NO - Go to step 3.
3. Disconnect the 2P connector from the inverter unit.
4. Turn the combination light switch ON.
5. Measure voltage between the No. 2 terminal of the inverter unit 2P connector and body ground.
Is there battery voltage?
YES - Go to step 6.
NO - Repair open in the wire between the under-hood fuse/relay box and the inverter unit
6. Turn the combination light switch OFF.
7. Check for continuity between the No. 1 terminal of the inverter unit 2P connector and body ground.
Is there continuity?
YES - Substitute a known-good inverter, and recheck. If the symptom/indication goes away, replace the original inverter unit.
NO - Repair open in the wire between the inverter unit and body ground. If the wire is OK, check for poor ground at G201 or G301.