Lexus ES300 (1997 year). Manual — part 112

BE05C–03

N21362

OFF

INT

LO

HI

2

Washer ON

7

8

11

16

17

N20210

2

7

16

N20211

2

7

17

16

INT time control
switch position

FAST

SLOW

Non variable type

Voltage

Approx. 2 sec.

Battery positive voltage

0 V

Battery positive voltage

0 V

Battery positive voltage

0 V

10.7

±

5 sec.

3.3

± 1

sec.

BE–54

–

BODY ELECTRICAL

WIPER AND WASHER SYSTEM

1438

1997 LEXUS ES300 (RM511U)

INSPECTION

1.

INSPECT FRONT WIPER AND WASHER SWITCH
CONTINUITY

Switch position

Tester connection

Specified condition

OFF

7 – 16

Continuity

INT

7 – 16

Continuity

LO

7 – 17

Continuity

HI

8 – 17

Continuity

Washer ON

2 – 11

Continuity

If continuity is not as specified, replace the switch.

2.

INSPECT INTERMITTENT OPERATION

(a)

Turn the wiper switch to INT position.

(b)

Turn the intermittent time control switch to FAST position.

(c)

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

(d)

Connect the positive (+) lead from the voltmeter to termi-
nal 7 and the negative (–) lead to terminal 2, check that
the meter needle indicates battery positive voltage.

(e)

After connecting terminal 16 to terminal 17, connect it to
terminal 2, check the voltage rises from 0 volt to battery
positive voltage within the time, as shown in the table.

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

N20210

16

7

2

N11301

Washer Switch ON

OFF

Battery Voltage

0 V

Less than 1 sec.

Approx. 3 sec.

N21363

Wire Harness Side

1

2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18

N21364

1

5

–

BODY ELECTRICAL

WIPER AND WASHER SYSTEM

BE–55

1439

1997 LEXUS ES300 (RM511U)

3.

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.

4.

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.

5.

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

5

4

N21366

1

5

N21367

3

5

1

2

Z10066

Wire Harness Side

1 2 3

4 5

BE–56

–

BODY ELECTRICAL

WIPER AND WASHER SYSTEM

1440

1997 LEXUS ES300 (RM511U)

6.

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.

7.

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.

8.

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

2

1

Z07418

Wire Harness Side

1

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.

9.

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.