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.
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