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BODY ELECTRICAL
TROUBLESHOOTING
BE-3
1521
Author:
Date:
2001 SIENNA (RM787U)
Headlight does not light up with engine running and light control
SW in OFF.
1. Headlight Bulb
2. ECU-B Fuse (E/G Room J/B No.2)
3. GAUGE Fuse (Driver Side J/B No.1)
4. HEAD HI (LH, RH) Fuse (E/G Room J/B No.2)
5. Daytime Running Light Relay (Main)
6. Wire Harness
7. Other Parts*
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Taillight does not light up
(Headlight is normal)
1. TAIL Fuse (Driver Side J/B No.1)
2. Taillight Control Relay (Driver Side J/B No.1)
3. Body ECU (Integration Relay)
4. Light Control Switch
5. Wire Harness
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Only one side light does not light up
1. Bulb
2. Wire Harness
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Rear combination light does not light up
1. Bulb
2. Wire Harness
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*Terminal L of Generator and Parking Brake Switch
FOG LIGHT SYSTEM
Symptom
Suspect Area
See page
Fog light does not light up with light control SW HEAD
(Headlight is normal.)
1. FOG Fuse (R/B NO.7)
2. H-LP LH LO Fuse (R/B NO.7)
3. Fog Light Relay
4. Head Relay (Engine Room J/B NO.2)
5. Fog Light Switch
6. Wire Harness
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Fog light does not light up with light control SW HEAD
(Headlight does not light).
1.
*1
Other Parts
2. Wire Harness
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Only one light does not light up.
1. Bulb
2. Wire Harness
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*1: Inspect Headlight System
TURN SIGNAL AND HAZARD WARNING SYSTEM:
Symptom
Suspect Area
See page
”Hazard” and ”Turn” do not light up.
1. Hazard Fuse (Engine Room J/B NO.2)
2. Hazard Warning Switch
3. Turn Signal Flasher
4. Wire Harness
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The flashing frequency is abnormal.
1. Bulb
2. Turn Signal Flasher
3. Turn Signal Switch
4. Wire Harness
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Hazard warning light does not light up.
(Turn is normal.)
1. Hazerd Fuse (E/G Room J/B No.2)
2. Hazerd Warning Switch
3. Wire Harness
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Hazard warning light does not light up in one direction.
1. Hazard Warning Switch
2. Wire Harness
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1
Turn signal does not light up.
1. Ignition Switch
2. TURN Fuse (Driver Side J/B No.1)
3. Turn Signal Switch
4. Wire Harness
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2
Turn signal does not light up.
1. TURN Fuse (Driver Side J/B No.1)
2. Turn Signal Switch
3. Wire Harness
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