Lexus ES300 (1997 year). Service manual — part 180

N20210

N11301

Washer Switch ON

OFF

Battery Voltage

0 V

Less than 1 sec.

Approx. 3 sec.

N21363

Wire Harness Side

2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18

N21364

–

BODY ELECTRICAL

WIPER AND WASHER SYSTEM

BE–55

1439

1997 LEXUS ES300 (RM511U)

INSPECT WASHER LINKED OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
16 and the negative (–) lead to terminal 2.

(b)

Connect the positive (+) lead from the voltmeter to termi-
nal 7 and the negative (–) lead to terminal 2.

(c)

Push in the washer switch, and check that the voltage
changes as shown in the table below.

If operation is not as specified, replace the wiper and washer
switch.

INSPECT WIPER SWITCH CIRCUIT

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

Tester connection

Condition

Specified condition

2 – Ground

Constant

Continuity

11 – Ground

Ignition switch LOCK or ACC

No voltage

11 – Ground

Ignition switch ON

Battery positive voltage

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

Low Speed:
INSPECT FRONT WIPER MOTOR OPERATION

Connect the positive (+) lead from the battery to terminal 1 and
the negative (–) lead to terminal 5, check that the motor oper-
ates at low speed.
If operation is not as specified, replace the motor.

N21365

N21366

N21367

Z10066

Wire Harness Side

1 2 3

4 5

BE–56

–

BODY ELECTRICAL

WIPER AND WASHER SYSTEM

1440

1997 LEXUS ES300 (RM511U)

High Speed:
INSPECT FRONT WIPER MOTOR OPERATION

Connect the positive (+) lead from the battery to terminal 4 and
the negative (–) lead to terminal 5, check that the motor oper-
ates at high speed.
If operation is not as specified, replace the motor.

Stopping at Stop Position:
INSPECT FRONT WIPER MOTOR OPERATION

(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 1.

(b)

Connect terminals 1 and 3.

(c)

Connect the positive (+) lead from the battery to terminal
2 and negative (–) lead to terminal 5, check that the motor
stops running at the stop position after the motor operates
again.

If operation is not as specified, replace the motor.

INSPECT WIPER MOTOR CIRCUIT

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

Tester connection

Condition

Specified condition

5 – Ground

Constant

Continuity

1 – Ground

* Wiper switch OFF or INT, HIGH

No voltage

1 – Ground

* Wiper switch LOW

Battery positive voltage

2 – Ground

Ignition switch LOCK or ACC

No voltage

2 – Ground

Ignition switch ON

Battery positive voltage

4 – Ground

* Wiper switch OFF or INT, LOW

No voltage

4 – Ground

* Wiper switch HIGH

Battery positive voltage

N21368

Z07418

Wire Harness Side

le–3–1–C

2 3

–

BODY ELECTRICAL

WIPER AND WASHER SYSTEM

BE–57

1441

1997 LEXUS ES300 (RM511U)

*: Turn ignition switch ON
If circuit is not as specified, inspect the circuits connected to oth-
er parts.

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.

10.

INSPECT WASHER MOTOR CIRCUIT

Disconnect the connector from the washer motor and inspect
the connector on harness side.

Tester connection

Condition

Specified condition

1 – Ground

Washer switch OFF (released)

No continuity

1 – Ground

Washer switch ON (pushed in)

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 wire harness, power source
or wiper switch.

BE05D–03

BE–58

–

BODY ELECTRICAL

COMBINATION METER

1442

1997 LEXUS ES300 (RM511U)

COMBINATION METER

TROUBLESHOOTING

PRECAUTIONS
(a)

When checking voltage, resistance, etc., use a high impedance type tester (It is impossible to use a
simple tester).

(b)

When the ignition switch is turned to START, all meters will go out but this is normal.

(c)

When replacing the internal mechanism (computer parts) of the meter, be careful that no part of your
body or clothing comes in contact with the terminals of the leads from the IC, etc. of the replacement
parts (spare parts).

(d)

Do not disconnect the battery while the engine is running as this would cause an instant reverse
charge, resulting in damage to the components.

(e)

Always disconnect the battery terminals before pulling apart connectors or terminals.

(f)

To prevent damage, handle meters with care.

Trouble

Refer to

No display at all.

The four indicator needles do not light up.

Replace com-

bination meter

computer.

One indicator needle does not light up.

The character plate is not illuminated at one or two loca-

tions.

All Meters, Gauges, and Illuminations

Brightness does not change even when light control

switch is operated (OFF

↔

TAIL).

Brightness does not change even when rheostat volume

is turned.

Remains dimmed when the light control switch is turned

OFF.

Replace com-

bination meter

computer.

Does not go out while starter running.

Speedometer does not operate while driving.

Speedometer

Vehicle speed signal (4P) faulty.

Tachometer

Tachometer does not operate while engine running.

Fuel Gauge

Does not operate or operation is abnormal.

Fuel Level Warning

Warning light does not light up or always lights up.

Engine Coolant Temperature Gauge

Does not operate or operation is abnormal.

Low Oil Pressure warning