Lexus GS300/400 (2000 year). Service manual — part 77

BE–8

–

BODY ELECTRICAL

TROUBLESHOOTING

2309

BACK–UP LIGHT SYSTEM

Symptom

Suspect Area

See page

Back–Up Light does not light up.

1. GAUGE Fuse

2. Ignition Switch

3. Wire Harness

4. Bulb

BE–21

BE–31

–

–

Back–Up Light remains always on.

1. Park/ Neutral Position Switch

2. Wire Harness

DI–372

–

Only one light does not light up.

1. Bulb

2. Wire Harness

–

–

STOP LIGHT SYSTEM

Symptom

Suspect Area

See page

Stop light does not light up.

1. STOP Fuse

2. Stop Light Switch

3. Light Failure Relay

4. Wire Harness

BE–21

BE–70

BE–92

–

Stop light always lights up.

1. Stop Light Switc

2. Wire Harness

BE–70

–

Only one light always lights up.

Wire Harness

–

Only one light does not light up.

1. Bulb

2. Wire Harness

–

–

HEADLIGHT CLEANER SYSTEM

Symptom

Suspect Area

See page

”Headlight Cleaner System” does not operate

(All)

1. H–LP CLN Fuse

2. WASHER Fuse

3. Ignition Switch

4. Headlight Cleaner Switch

5. Headlight Cleaner Relay

6. Headlight Cleaner Motor

7. Headlight Cleaner Nozzle and Hose

8. Wire Harness

BE–21

BE–21

BE–31

BE–73

BE–73

–

–

–

Washer fluid does not spray.

Headlight Cleaner Nozzle and Hose

–

WIPER AND WASHER SYSTEM

Symptom

Suspect Area

See page

Wipers and washer do not operate.

1. WIP Fuse

2. Wiper Switch

3. Wiper Motor

4. Wire Harness

BE–21

BE–77

BE–77

–

Wipers do not operate in LO, HI or MIST.

1. Wiper Switch

2. Wiper Motor

3. Wire Harness

BE–77

BE–77

–

Wipers do not operate in INT.

1. Wiper Switch

2. Wiper Motor

3. Wire Harness

BE–77

BE–77

–

Washer motor does not operate.

1. WASHER Fuse

2. Washer Switch

3. Washer Motor

4. Wire Harness

BE–21

BE–77

BE–77

–

Wipers do not operate when washer switch ON.

1. WASHER Fuse

2. Washer Switch

3. Wiper Motor

4. Wire Harness

BE–21

BE–77

BE–77

–

–

BODY ELECTRICAL

TROUBLESHOOTING

BE–9

2310

Washer fluid does not operate.

Washer Hose and Nozzle

–

When wiper switch is in HI position, the wiper blade is in contact

with the body.

When the wiper switch is OFF, the wiper blade does not retract

or the retract position is wrong.

1. Wiper Motor *

1

2. Wire harness *

1

BE–77

–

*

1

: Inspect wiper arm and blade set positions.

COMBINATION METER

This system uses the multiplex communication system, so check diagnosis system of the multiplex
communication system before you proceed with troubleshooting.

Refer to DI section for warning light or indicator light not described in the table below.

Symptom

Suspect Area

See page

Driver seat belt warning light does not light up.

1. Bulb

2. Driver Buckle Switch CIrcuit

3. Meter Circuit Plate

4. Wire Harness

5. Body No.2 ECU

–

BE–92

BE–92

–

DI–820

Passenger seat belt warning light does not light up.

1. Clock System

2. Passenger Buckle Switch CIrcuit

3. Occupant Detection Sensor

4. Meter Circuit Plate

5. Wire Harness

6. Body No.1 ECU

BE–227

BE–92

BE–92

BE–92

–

DI–776

SRS warning light does not light up.

1. MPX–B Fuse

2. SRS–B Fuse

3. Bulb

4. Meter Circuit Plate

5. Wire Harness

6. Airbag Sensor Assembly

BE–21

BE–21

–

BE–92

–

DI–550

Hi–beam indicator light does not light up.

1. Bulb

2. Meter Circuit Plate

3. Wire Harness

4. Headlight System

–

BE–92

–

BE–3

Turn indicator light does not light up.

1. Bulb

2. Meter Circuit Plate

3. Wire Harness

4. Turn Signal and Hazard Warning System

–

BE–92

–

BE–3

ABS warning light does not light up.

1. GAUGE Fuse

2. Bulb

3. Meter Circuit Plate

4. Wire Harness

5. ABS, TRAC and VSC ECU

BE–21

–

BE–92

–

DI–387

TRAC warning light does not light up.

1. GAUGE Fuse

2. Bulb

3. Meter Circuit Plate

4. Wire Harness

5. ABS, TRAC and VSC ECU

BE–21

–

BE–92

–

DI–473

BE–10

–

BODY ELECTRICAL

TROUBLESHOOTING

2311

Malfunction indicator light does not light up.

1. Bulb

2. Meter Circuit Plate

3. Wire Harness

4. ECM (2JZ–GE)

5. ECM (1UZ–FE)

–

BE–92

–

DI–1

DI–156

Fuel level warning light does not light up.

1. Bulb

2. Fuel level warning sensor

3. Meter Circuit Plate

4. Wire Harness

–

–

BE–92

–

ELECTRIC TENSION REDUCER SYSTEM

Symptom

Suspect Area

See page

Tension Reducer does not operate.

(Driver’s and Passenger’s)

1. ECU–IG Fuse

2. Wire Harness

BE–21

–

Tension Reducer does not operate.

(Only one side)

1. Buckle Switch

2. Tension Reducer Solenoid

3. Wire Harness

BE–92

BE–92

–

DEFOGGER 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

Rear window defogger does not operate.

1. HTR Fuse

2. DEF M–Fuse

3. Defogger Relay Circuit

4. Defogger Switch (in A/C Panel Switch)

5. Defogger Wire

6. Wire Harness

7. Body No.1 ECU

BE–21

BE–21

DI–812

BE–108

BE–108

–

DI–776

Mirror defogger does not operate.

1. MIR–HTR Fuse (Passenger SIde J/B)

2. Mirror Heater Relay

3. Mirror Heater

4. Wire Harness

BE–21

BE–108

BE–108

–

POWER WINDOW CONTROL 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

All the power windows do not operate.

(Power Door Lock System is normal.)

1. PWS terminal circuit

2. Power Window Master Switch

3. Wire Harness

4. Driver Door ECU

5. Body No.1 ECU

DI–818

BE–117

–

DI–856

DI–776

Only the driver’s window does not operate.

1. Power Window Master Switch

2. Power WIndow Switch

3. Power Window Motor

4. Wire Harness

BE–117

BE–117

BE–117

–

”Window lock function” does not operate.

1. Power Window Master Switch

BE–117

Window does not operate with power window master switch.

(Manual or Automatic operation can be performed.)

TROUBLESHOOTING NO.1

BE–111

Remote control of all windows (Except driver’s) does not functions

with master switch.

(Windows operate normally with each of master switch.)

TROUBLESHOOTING NO.2

BE–111

–

BODY ELECTRICAL

TROUBLESHOOTING

BE–11

2312

The Key related power window operations does not operate with

driver side door key cylinder.

(Master switch operation is normal.)

TROUBLESHOOTING NO.3

BE–111

Power window does not operate with multi–function transmitter.

(Windows operate normally with master switch.)

TROUBLESHOOTING NO.4

BE–111

Window moves down without being ordered during the up opara-

tion.

TROUBLESHOOTING NO.5

BE–111

POWER DOOR LOCK CONTROL 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

All the doors cannot be locked or unlocked.

(Power Window Control System is normal.)

1. Door Lock Control Switch

2. Wire Harness

3. Body No.1 ECU

BE–131

–

DI–776

Only one side door lock control does not operate.

1. Door Lock Motor

2. Wire Harness

3. Each Door ECU

BE–131

–

–

Door key related function does not operate.

1. Door Key Lock and Unlock Switch

2. Wire Harness

3. Each Door ECU

4. Body No.1 ECU

BE–131

–

–

DI–776

Key confinement prevention function does not operate.

1. Key Unlock Warning Switch

2. Door Courtesy Switch

3. Wire Harness

4. Each Door ECU

BE–31

BE–60

–

–

Luggage compartment door opener function does not operate.

1. Luggage Compartment Door Opener Switch

2. Luggage Compartment Door Opener Motor

3. Wire Harness

4. Body No.1 ECU

BE–131

BE–131

–

DI–776

THEFT DETERRENT 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

The system cannot be set.

1. Indicator Light

2. Key Unlock Warning Switch

3. Door Unlock Detection Switch

4. Engine Hood Courtesy Switch

5. Luggage Compartment Door Courtesy Switch

6. Wire Harness

7. Each Door ECU

8. Body No.1 ECU

BE–150

BE–31

BE–131

BE–150

BE–60

–

–

DI–776

The system cannot be canceled when the ignition switch is turned

to ON with key.

1. Key Unlock Warning Switch

2. Ignition Switch

3. RAD NO.2 Fuse

4. Wire Harness

5. Body No.1 ECU

BE–31

BE–31

BE–21

–

DI–776

The system cannot be canceled when the luggage compartment

door is unlocked with key.

1. Luggage Compartment Door Courtesy Switch

2. Wire Harness

3. Body No.1 ECU

BE–60

–

DI–776

The system does not operate when the engine hood is opened.

1. Engine Hood Courtesy Switch

2. Wire Harness

3. Body No.1 ECU

BE–150

–

DI–776