Lexus ES300 (1997 year). Manual - part 179

BE05A–01

Z06565

1

2

3

4

4

2

1

3

Z06566

Wire Harness Side

1

2

3

4

eg–4–1

N21597

1

2

–

BODY ELECTRICAL

STOP LIGHT SYSTEM

BE–51

1435

1997 LEXUS ES300   (RM511U)

INSPECTION

1.

INSPECT STOP LIGHT SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

Switch pin free

1 – 2

Continuity

Switch pin pushed in

3 – 4

Continuity

If continuity is not as specified, replace the switch.

2.

INSPECT STOP LIGHT SWITCH CIRCUIT

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

Tester connection

Condition

Specified condition

2 – Ground

Constant

Battery positive voltage

If circuit is not as specified, inspect the power source or wire
harness.

3.

INSPECT HIGH–MOUNTED STOP LIGHT ASSEMBLY
CONTINUITY

Using the ohmmeter, check that continuity exists between ter-
minals.
If continuity is not as specified, replace the bulb or light assem-
bly.

N21598

Wire Harness Side

1

2

e–2–1–J

N20209

Wire Harness Side

1

2

3

4

5

6

7

8

9

10

11

12

e–12–2–B

BE–52

–

BODY ELECTRICAL

STOP LIGHT SYSTEM

1436

1997 LEXUS ES300   (RM511U)

4.

INSPECT HIGH–MOUNTED STOP LIGHT ASSEMBLY
CIRCUIT

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

Tester connection

Condition

Specified condition

1 – Ground

Constant

Battery positive voltage

If circuit is not as specified, inspect the power source or wire
harness.

5.

INSPECT LIGHT FAILURE SENSOR CIRCUIT

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

Tester connection

Condition

Specified condition

1 – Ground

Constant

Continuity*

2 – Ground

Constant

Continuity*

9 – Ground

Constant

Continuity*

11 – Ground

Constant

Continuity

3 – Ground

Light control switch OFF

No voltage

3 – Ground

Light control switch TAIL or HEAD

Battery positive voltage

4 – Ground

Ignition switch LOCK or ACC

No voltage

4 – Ground

Ignition switch ON

Battery positive voltage

7 – Ground

Stop light switch OFF

No voltage

7 – Ground

Stop light switch ON

Battery positive voltage

8 – Ground

Ignition switch LOCK or ACC

No voltage

8 – Ground

Ignition switch ON

Battery positive voltage

*: There is resistance because this circuit is grounded through
the bulb.
If the circuit is as specified, replace the sensor.
If the circuit is not as specified, inspect the circuits connected
to other parts.

Z19354

Wiper Motor

Washer Motor

Combination Switch

 Wiper and Washer

Switch

Ignition Switch

Instrument Panel Junction Block

 WIPER Fuse

BE05B–01

–

BODY ELECTRICAL

WIPER AND WASHER SYSTEM

BE–53

1437

1997 LEXUS ES300   (RM511U)

WIPER AND WASHER SYSTEM

LOCATION

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.