Toyota Sequoia (2005). Manual - part 854

BE01E–12

–

BODY ELECTRICAL

BODY ELECTRICAL SYSTEM

BE–1

3405

BODY ELECTRICAL SYSTEM

PRECAUTION

NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.

System Name

See Page

Back Door Power Window Control System

BE–77

Take care to observe the following precautions when performing inspections or removal and replacement
of body electrical related parts.
1.

LIGHTING SYSTEM

Halogen bulbs have pressurized gas inside and require special handling.
They may burst or shatter if scratched or the bulb is dropped. Hold a bulb only by its plastic or metal case.
Don’t touch the glass part of a bulb with bare hands.
2.

SRS (SUPPLEMENTAL RESTRAINT SYSTEM)

The SEQUOIA is equipped with an SRS (Supplemental Restraint System) such as the driver airbag. Failure
to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during
servicing, possibly leading to a serious accident. Before servicing (including removal and installation of parts,
inspection or replacement), be sure to read the precautions in the RS section (See page xx–xxx).
3.

AUDIO SYSTEM

If the battery negative (–) terminal is disconnected, the preset AM, FM 1 and FM 2 stations stored in the
memory are erased, so be sure to make a memo of the stations and reset them after the battery terminal
is reconnected.
4.

MOBILE COMMUNICATION SYSTEM

If the vehicle is equipped with a mobile communication system, refer to precautions in the IN section.

BE19B–08

BE–2

–

BODY ELECTRICAL

TROUBLESHOOTING

3406

TROUBLESHOOTING

PROBLEM SYMPTOMS TABLE

POWER OUTLET

Symptom

Suspect Area

See page

Electric power source cannot be out of the power outlet.

1. PWR OUTLET Fuse

2. INVERTER Relay

3. Main Switch

4. Voltage Inverter

5. Wire Harness

BE–14

BE–20

BE–20

BE–20

–

IPO system does not operate.

Power source cannot be supplied from the power outlet socket

when the ignition switch is off.

1. PWR OUTLET Fuse

2. INVERTER Relay

3. Instrument panel J/B (IPO) circuit

4. Wire Harness

BE–14

BE–20

BE–20

–

IGNITION SWITCH
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.

Symptom

Suspect Area

See page

Ignition switch is not set to each position.

1. Ignition Switch

2. Power Source Circuit (Body ECU)

3. Power Source Circuit (Driver door ECU)

4. Power Source Circuit (Passenger door ECU)

BE–24

DI–1700

BE–34

DI–1849

KEY UNLOCK WARNING SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.

Symptom

Suspect Area

See page

Key unlock warning system does not operate.

(The buzzer does not sound when the driver’s door is opened with

the ignition OFF and key inserted)

1. Key Unlock Warning Switch

2. Driver Door Courtesy Light Switch

3. Wire Harness

4. Combination Meter

BE–24

BE–40

–

–

Key unlock warning system does not operate.

(The buzzer sounds when the ignition key is ACC or ON)

1. Ignition Switch

2. Wire Harness

3. Combination Meter

BE–24

–

–

w/o Daytime Running Light:
HEADLIGHT AND TAILLIGHT SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.

Symptom

Suspect Area

See page

Only one headlight comes on.

1. Bulb

2. Wire Harness

–

–

”LO–Beam” does not light (All).

1. HEAD Relay

2. Headlight Dimmer Switch

3. Wire Harness

4. Body ECU

BE–27

BE–27

–

–

”LO–Beam” does not light (One side).

1. Bulb

2. H–LP LH Fuse

3. H–LP RH Fuse

4. Wire Harness

–

BE–14

BE–14

–

–

BODY ELECTRICAL

TROUBLESHOOTING

BE–3

3407

”HI–Beam” does not light (All).

1. HEAD Relay

2. Headlight Dimmer Switch

3. Wire Harness

4. Body ECU

BE–27

BE–27

–

–

”HI–Beam” does not light (One side).

1. Bulb

2. H–LP LH Fuse

3. H–LP RH Fuse

4. Wire Harness

–

BE–14

BE–14

–

”Flash” does not light.

1. H–LP LH Fuse

2. H–LP RH Fuse

3. Bulb

4. Headlight Dimmer Switch

5. Wire Harness

6. Body ECU

BE–14

BE–14

–

BE–27

–

–

Headlight does not come on.

1. Bulb

2. HEAD Relay

3. Light Control Switch

4. Wire Harness

5. Body ECU

–

BE–27

DI–1750

–

–

Headlight flickers.

1. Bulb

2. Wire Harness

3. Body ECU

–

–

–

Headlight is dark.

1. Bulb

2. Body 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

2. TAILLIGHT Relay

3. Light Control Switch

4. Wire Harness

5. Body ECU

BE–14

BE–27

BE–27

–

–

Taillight does not come on.

(Headlight does not come on)

1. TAIL Fuse

2. TAILLIGHT Relay

3. Light Control Switch

4. Wire Harness

5. Body ECU

BE–14

BE–27

BE–27

–

–

Rear combination light does not come on.

1. Bulb

2. TAIL Fuse

3. TAILLIGHT Relay

4. Wire Harness

5. Body ECU

–

BE–14

BE–27

–

–

w/ Daytime Running Light:
HEADLIGHT AND TAILLIGHT SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.

Symptom

Suspect Area

See page

Only one headlight comes on.

1. Bulb

2. Wire Harness

–

–

BE–4

–

BODY ELECTRICAL

TROUBLESHOOTING

3408

”LO–Beam” does not light (All).

1. HEAD Relay

2. DRL Fuse

3. DIMMER Relay

4. DRL No. 4 Relay

5. Wire Harness

6. Body ECU

BE–27

BE–14

BE–27

BE–27

–

–

”LO–Beam” does not light (One side).

1. Bulb

2. H–LP LL Fuse

3. H–LP LP Fuse

4. Wire Harness

–

BE–14

BE–14

–

”HI–Beam” does not light (All).

1. HEAD Relay

2. Headlight Dimmer Switch

3. DRL Fuse

4. DIMMER Relay

5. DRL No. 4 Relay

6. Wire Harness

7. Body ECU

BE–27

BE–27

BE–14

BE–27

BE–27

–

–

”HI–Beam” does not light (One side).

1. Bulb

2. H–LP LL Fuse

3. H–LP LP Fuse

4. Wire Harness

–

BE–14

BE–14

–

”Flash” does not light.

1. Headlight Dimmer Switch

2. Wire Harness

3. Body ECU

BE–27

–

–

Headlight does not come on.

1. Bulb

2. HEAD Relay

3. DIMMER Relay

4. DRL No. 4 Relay

5. Headlight Dimmer Switch

6. Light Control Switch

7. Wire Harness

8. Body ECU

–

BE–27

BE–27

BE–27

BE–27

BE–27

–

–

Headlight does not go off when light control switch is in OFF posi-

tion.

1. Power Source Circuit (Body ECU)

2. HEAD Relay

3. DIMMER Relay

4. Light Control Switch

5. Wire Harness

6. Body ECU

DI–1700

BE–27

BE–27

BE–27

–

–

Headlight flickers.

1. Bulb

2. Wire Harness

3. Body ECU

–

–

–

Headlight is dark.

1. Bulb

2. Wire Harness

3. Body ECU

–

–

–

Taillight does not come on when light control switch is in TAIL

position.

1. TAIL Fuse

2. TAILLIGHT Relay

3. Light Control Switch

4. Wire Harness

5. Body ECU

BE–14

BE–27

BE–27

–

–