USA: Headlight And Taillight System:
This system uses the multiplex communication system, so check diagnosis system of the multiplex communication system before you proceed with troubleshooting. Refer to MULTIPLEX COMMUNICATION SYSTEM .
HINT:
To inspect the bulb and light control ECU, replace them with the ones working normally and judge whether they work normally or not.
USA HEADLIGHT AND TAILLIGHT SYSTEM PROBLEM SYMPTOM
| Symptom | Suspect Area | Action | ||
|---|---|---|---|---|
| "Automatic light control system" does not operate. | 1. Automatic Light Control Sensor | INSPECTION | ||
| 2. Light Control Switch | INSPECTION | |||
| 3. Door Courtesy Switch | INSPECTION | |||
| 4. Wire Harness | - | |||
| 5. Body No. 2 ECU | BODY ECU NO. 2 SYSTEM OPERATION CHECK | |||
| Auto turn-off system does not operate when the driver's door is opened. | 1. Drivers Door Courtesy Switch | INSPECTION | ||
| Auto turn-off system: | 1. Body ECU No. 2 | BODY ECU NO. 2 SYSTEM OPERATION CHECK | ||
| Headlight and taillight do not come on. | 2. Wire Harness | - | ||
| Auto turn-off system: | 1. Body ECU No. 2 | BODY ECU NO. 2 SYSTEM OPERATION CHECK | ||
| Headlight and taillight stay on. | 2. Wire Harness | - | ||
| Only one headlight comes on. | 1. Bulb | - | ||
| 2. (1)Light Control ECU | - | |||
| 3. Wire Harness | - | |||
| "LO-Beam" does not light (All). | 1. Headlight Control Relay | INSPECTION | ||
| 2. (1)Light Control ECU | - | |||
| 3. Wire Harness | - | |||
| "LO-Beam" does not light (One side). | 1. Bulb | - | ||
| 2. H-LP L-LWR Fuse | POWER SOURCE | |||
| 3. H-LP R-LWR Fuse | POWER SOURCE | |||
| 4. (1)Light Control ECU | - | |||
| 5. Wire Harness | - | |||
| "Hl-Beam" does not light (All). | 1. Headlight Dimmer Switch | INSPECTION | ||
| 2. Wire Harness | - | |||
| "Hl-Beam" does not light (One side). | 1. Bulb | - | ||
| 2. H-LP L-UPR Fuse | POWER SOURCE | |||
| 3. H-LP R-UPR Fuse | POWER SOURCE | |||
| 4. Wire Harness | - | |||
| "Flash" does not light. | 1. H-LP L-UPR Fuse | POWER SOURCE | ||
| 2. H-LP R-UPR Fuse | POWER SOURCE | |||
| 3. Headlight Dimmer Switch | INSPECTION | |||
| 4. (1)Light Control ECU | - | |||
| 5. Wire Harness | - | |||
| "Flash" does not light. | 1. Bulb | - | ||
| 2. (1)Light Control ECU | - | |||
| 3. Wire Harness | - | |||
| Headlight does not come on. | 1. Headlight Control Relay | INSPECTION | ||
| 2. Light Control Switch | INSPECTION | |||
| 3. (1)Light Control ECU | - | |||
| 4. Wire Harness | - | |||
| Headlight does not come on. | 1. Bulb | - | ||
| 2. Light Control ECU | - | |||
| 3. Wire Harness | - | |||
| Headlight flickers. | 1. Bulb | - | ||
| 2. (1)Light Control ECU | - | |||
| 3. Wire Harness | - | |||
| Headlight is dark. | 1. Bulb | - | ||
| 2. (1)Light control ECU | - | |||
| 3. Wire Harness | - | |||
| Only one taillight comes on. | 1. Bulb | - | ||
| 2. Wire Harness | - | |||
| Taillight does not come on. (Headlight is normal) | 1. TAIL Fuse | POWER SOURCE | ||
| 2. GAUGE Fuse | POWER SOURCE | |||
| 3. Taillight Control Relay | INSPECTION | |||
| 4. Light Failure Relay | INSTRUMENT PANEL - TROUBLESHOOTING | |||
| 5. Light Control Switch | INSPECTION | |||
| 6. Wire Harness | - | |||
| Taillight does not come on. (Headlight does not light) | 1. Light Control Switch | INSPECTION | ||
| 2. Wire Harness | - | |||
| Rear combination light does not come on. | 1. Light Failure Relay | INSTRUMENT PANEL - TROUBLESHOOTING | ||
| 2. Wire Harness | - | |||
| 3. Bulb | - | |||
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