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Home >> Toyota >> 2005 >> Land Cruiser >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Body Electrical Systems (Troubleshooting) >> Problem Symptoms Table >> Headlight And Taillight System:

Headlight And Taillight System:

This system uses the body control system, so check the body control system before you proceed with troubleshooting (See HOW TO PROCEED WITH TROUBLESHOOTING ).

PROBLEM SYMPTOMS TABLE - HEADLIGHT AND TAILLIGHT SYSTEM

Symptom Suspect Area
"Automatic light control system" does not operate.
  1. Automatic Light Control Sensor
  2. Light Control Switch
  3. Door Courtesy Switch
  4. Wire Harness
Auto turn-off system does not operate when the driver's door is opened.
  1. Drivers Door Courtesy Switch
Auto turn-off system: Headlight and taillight do not come on.
  1. Body ECU
  2. Wire Harness
Auto turn-off system: Headlight and taillight stay on.
  1. Body ECU
  2. Wire Harness
Only one headlight comes on.
  1. Daytime Running Light No.3, 4 Relays
  2. Body ECU
  3. Bulb
  4. Wire Harness
"LO-beam" does not light (All).
  1. Engine Room J/B Relay Circuit
  2. Wire Harness
"LO-beam" does not light (One side).
  1. Bulb
  2. H-LP L-LWR Fuse
  3. H-LP R-LWR Fuse
  4. Wire Harness
"HI-beam" does not light (All).
  1. Headlight Dimmer Switch
  2. Body ECU
  3. Wire Harness
"HI-beam" does not light (One side).
  1. Bulb
  2. H-LP L-UPR Fuse
  3. H-l P R-UPR Fuse
  4. Daytime Running Light No.3, 4 Relays
  5. Wire Harness
"Flash" does not light.
  1. Headlight Dimmer Switch
  2. Body ECU
  3. Wire Harness
Headlight does not come on.
  1. Engine Room J/B Relay Circuit
  2. Body ECU
  3. Daytime Running Light No.3, 4 Relays
  4. Headlight Dimmer Switch
  5. Light Control Switch
  6. Wire Harness
  7. Bulb
Headlight does not come on with light control switch in HEAD.
  1. Light Control Switch
  2. Wire Harness
Headlight does not go out with light control switch in OFF.
  1. Engine Room J/B Relay Circuit
  2. Wire Harness
Headlight flickers.
  1. Bulb
  2. Wire Harness
Headlight is dark.
  1. Bulb
  2. Wire Harness
Taillight does not come on with light control switch in l AIL.
  1. Engine Room J/B Relay Circuit
  2. Light Control Switch
  3. Wire Harness
Taillight does not go out with light control switch in OFF.
  1. Engine Room J/R Relay Circuit
  2. Light Control Switch
  3. Wire Harness
Headlight does not come on with engine running and light control switch in OFF.
  1. ECU-B1 Fuse
  2. ECU-IG1 Fuse
  3. Body ECU
  4. Daytime Running Light No.3, 4 Relays
  5. Generator L Terminal
  6. Parking Brake Switch
  7. Wire Harness
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