Page 154 of 1111

I04123
I04119
2
3
I01200
2 1
35
2 5
1 3
I05474
1
2
BE±120
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2421 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. INSPECT POWER WINDOW SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
AUTO3 ± 5Continuity
UP3 ± 6Continuity
OFF±No continuity
DOWN3 ± 4Continuity
If continuity is not as specified, replace the switch.
7. INSPECT POWER WINDOW SWITCH CIRCUIT
Passenger side: (See page DI±908)
Rear LH side: (See page DI±936)
Rear RH side: (See page DI±953)
8. INSPECT POWER WINDOW SWITCH ILLUMINATION
Connect the positive (+) lead from the battery to terminal 3 and
the negative (±) lead to terminal 2, and check that the indicator
light lights up.
If operation is not as specified, replace the switch.
9. INSPECT POWER MAIN RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 ± 2Continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.
10. INSPECT POWER MAIN RELAY CIRCUIT
(See page BE±21)
11. Driver 's door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2, and check that
the motor turns clockwise.
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I054751
2
I05476
1
2
I054771
2
I04124
13
I04125
13
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±121
2422 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Reverse the polarity, check that the motor turns counter-
clockwise.
If operation is not as specified, replace the motor.
12. Driver 's door:
INSPECT POWER WINDOW MOTOR CIRCUIT
(See page DI±876)
13. Front passenger's door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2, and check that
the motor turns clockwise.
(b) Reverse the polarity, check that the motor turns counter-
clockwise.
If operation is not as specified, replace the motor.
14. Front passenger's door:
INSPECT POWER WINDOW MOTOR CIRCUIT
(See page DI±910)
15. Rear left side door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
3 and the negative (±) lead to terminal 1, and check that
the motor turns clockwise.
(b) Reverse the polarity, check that the motor turns counter-
clockwise.
If operation is not as specified, replace the motor.
Page 156 of 1111

I04126
13
I04127
13
I04128
within
4 to 40 seconds
21
I04129
2 within
60 seconds
1
I04130
within
4 to 40 seconds
3 1
BE±122
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2423 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
16. Rear right side door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 3, and check that
the motor turns clockwise.
(b) Reverse the polarity, check that the motor turns counter-
clockwise.
If operation is not as specified, replace the motor.
17. Front door:
INSPECT POWER WINDOW MOTOR PTC OPERA-
TION
(a) Disconnect the connector from the master switch.
(b) Connect the positive (+) lead from the battery to terminal
2 and the negative (±) lead to terminal 1 on the wire har-
ness side connector and raise the window to full closed
position.
(c) Continue to apply voltage, check that there is a PTC op-
eration noise within approximately 4 to 90 seconds.
(d) Reverse the polarity, check that the window begins to de-
scend within approximately 60 seconds.
If operation is not as specified, replace the motor.
18. Rear door:
INSPECT POWER WINDOW MOTOR PTC OPERA-
TION
(a) Disconnect the connector from the rear door ECU.
(b) Connect the positive (+) lead from the battery to terminal
3 and the negative (±) lead to terminal 1 on the wire har-
ness side connector, and raise the window to full closed
position.
(c) Continue to apply voltage, check that there is a PTC op-
eration noise within approximately 4 to 90 seconds.
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