Lexus GS300/400 (2000 year). Service manual — part 91

I04072

4

3

I04073

5

4

I04074

1

5

4

2

I04076

Wire Harness Side

BE–78

–

BODY ELECTRICAL

WIPER AND WASHER SYSTEM

2379

4.

INSPECT WIPER MOTOR OPERATION
High speed:

Connect the positive (+) lead from the battery to terminal 3 and
the negative (–) lead to terminal 4, check that the motor oper-
ates at high speed.
If operation is not as specified, replace the motor.

5.

INSPECT WIPER MOTOR OPERATION
Stopping at stop position:

(a)

Operate the motor at low speed and stop the motor opera-
tion anywhere except at the stop position by disconnect-
ing positive (+) lead from terminal 5.

(b)

Connect terminals 1 and 5.

(c)

Connect the positive (+) lead from the battery to terminal
2 and negative (–) lead to terminal 4, check that the motor
stops running at the stop position after the motor operates
again.

If operation is not as specified, replace the motor.

6.

INSPECT WIPER MOTOR CIRCUIT
Connector disconnected:

Disconnect the connector from the motor and inspect the con-
nector on the wire harness side, as shown.

Tester connection

Condition

Specified condition

4 – Ground

Constant

Continuity

2 – Ground

Ignition switch LOCK or ACC

No voltage

2 – Ground

Ignition switch ON

Battery positive voltage

If circuit is not as specified, inspect the circuits connected to oth-
er parts.

I01272

2

1

I04077

Wire Harness Side

–

BODY ELECTRICAL

WIPER AND WASHER SYSTEM

BE–79

2380

7.

INSPECT WASHER MOTOR OPERATION

Connect the positive (+) lead from the battery to terminal 2 and
the negative (–) lead to terminal 1, check that the motor oper-
ates.
NOTICE:

These tests must be performed quickly (within 20 seconds) to

prevent the coil from burning out.

If operation is not as specified, replace the motor.

8.

INSPECT WASHER MOTOR CIRCUIT
Connector disconnected:

Disconnect the connector from the motor and inspect the con-
nector on the wire harness side, as shown.

Tester connection

Condition

Specified condition

2 – Ground

Ignition switch ON

Battery positive voltage

If circuit is not as specified, inspect the power source, wire har-
ness and wiper switch.

BE0HH–07

I01359

Brake Master Cylinder

Brake Fluid Level

Warning Switch

Combination Meter
and Telltale Light
Assembly

Airbag Sensor Assembly

Parking Brake Switch

Driver Side
Junction Block

GAUGE Fuse

SRS–B Fuse

Ignition Switch

ECM

Washer Tank

Washer Level

Warning Switch

Engine Room No.1
Junction Block

MPX–B Fuse

Seat Belt Buckle Switch

Rheostat Light Control

ABS, TRAC and VSC ECU

Clock Assembly

Passenger Seat Belt

Waning Light

BE–80

–

BODY ELECTRICAL

COMBINATION METER

2381

COMBINATION METER

LOCATION

The vehicle shown in this illustration is ”GS400”.

All components of ”GS300” other than the ones used for engine are same as ”GS400”.

I01360

Fuel Tank

Fuel Main

Sender Gauge

Fuel Tank

Fuel Sub

Sender Gauge

Occupant Detection Sensor
(Passenger seat belt
warning sensor)

Engine Oil Level
Warning Sensor

Engine Oil Level
Warning Sensor

Park/ Neutral
Position Switch

Low Oil Pressure
Warning Switch

Park/ Neutral
Position Switch

Low Oil Pressure
Warning Switch

GS300

GS400

Light Failure Sensor

–

BODY ELECTRICAL

COMBINATION METER

BE–81

2382