Lexus ES300 (1997 year). Service manual - part 262

N21199

7

N21200

7

N21374

Wire Harness Side

1 2 3

4 5 6

7 8 9 1011121314

s–14–1–B

N21201

1

2

3

4

5

6

BE–112

–

BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

1496

1997 LEXUS ES300   (RM511U)

4.

INSPECT ONE TOUCH POWER WINDOW SYSTEM/
CURRENT OF CIRCUIT (Using an ammeter with a cur-
rent–measuring probe)

(a)

Remove the master switch with connector connected.

(b)

Attach a current–measuring probe to terminal 7 of the
wire harness.

(c)

Turn the ignition switch ON and set the power window
switch in the down position.

(d)

As the window goes down, check that the current flow is
approximately 7 A.

(e)

Check that the current increases up to approximately
14.5 A or more when the window stops going down.

HINT:
The circuit breaker opens some 4 – 40 seconds after the win-
dow stops going down, so that check must be made before the
circuit breaker operates.
If operation is as specified, replace the master switch.

5.

INSPECT POWER WINDOW MASTER SWITCH CIR-
CUIT

Disconnect the connector from the master switch and inspect
the connector on the wire harness side.

Tester connection

Condition

Specified condition

1 – Ground

Constant

Continuity

7 – Ground

Ignition switch position LOCK or ACC

*No voltage

7 – Ground

Ignition switch position ON

Battery positive voltage

* Exceptions: During 60 seconds after the ignition switch is
turned ON 

→

 OFF (ACC) or until driver or a passenger’s door

is opened after the ignition switch is turned ON 

→

 OFF (ACC).

If the circuit is not as specified, inspect the circuits connected
to other parts.

6.

INSPECT POWER WINDOW SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

UP

    1 – 3          2 – 5

Continuity

OFF

    1 – 3          2 – 4

Continuity

DOWN

    2 – 4          3 – 5

Continuity

If continuity is not as specified, replace the switch.

Z07440

Wire Harness Side

1

2

3 4 5 6

N14863

1

2

5

3

3

5

2

1

N21202

(a)

(b)

1

2

2

1

–

BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

BE–113

1497

1997 LEXUS ES300   (RM511U)

7.

INSPECT POWER WINDOW SWITCH CIRCUIT

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

Tester connection

Condition

Specified condition

1 – Ground

Ignition switch position ON and

master switch position OFF

No voltage

1 – Ground

Ignition switch positrion ON and

master switch position DOWN

Battery positive voltage

4 – Ground

Ignition switch position ON and

master switch position OFF

No voltage

4 – Ground

Ignition switch position ON and

master switch position UP

Battery positive voltage

5 – Ground

Ignition switch position LOCK or ACC

*No voltage

5 – Ground

Ignition switch position ON

Battery positive voltage

*Exceptions: During 60 seconds period after the ignition switch
is turned ON 

→

 OFF (ACC) or until driver or a passenger’s door

is opened after the ignition switch is turned ON 

→

 OFF (ACC).

If the circuit is not as specified, inspect the circuits connected
to other parts.

8.

INSPECT POWER MAIN RELAY CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2

Continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.
9.

INSPECT POWER MAIN RELAY CIRCUIT
(See page 

BE–11

)

10.

Driver’s Door:
INSPECT POWER WINDOW MOTOR OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1, and check that
the motor turns counterclockwise.

(b)

Reverse the polarity, check that the motor turns clock-
wise.

If operation is not as specified, replace the motor.

N21203

(a)

(b)

1

2

2

1

N21204

(a)

(b)

1

2

2

1

N21205

(a)

(b)

1

2

2

1

N21206

within
4 to 40
seconds

13

6

BE–114

–

BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

1498

1997 LEXUS ES300   (RM511U)

11.

Front Passenger’s Door:
INSPECT POWER WINDOW MOTOR OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1, and check that
the motor turns counterclockwise.

(b)

Reverse the polarity, check that the motor turns clock-
wise.

If operation is not as specified, replace the motor.

12.

Rear Left Side Door:
INSPECT POWER WINDOW MOTOR OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1, and check that
the motor turns counterclockwise.

(b)

Reverse the polarity, check that the motor turns clock-
wise.

If operation is not as specified, replace the motor.

13.

Rear Right Side Door:
INSPECT POWER WINDOW MOTOR OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1, and check that
the motor turns counterclockwise.

(b)

Reverse the polarity, check that the motor turns clock-
wise.

If operation is not as specified, replace the motor.

14.

Driver’s Door:
INSPECT POWER WINDOW MOTOR CIRCUIT
BREAKER OPERATION

(a)

Disconnect the connector from the master switch.

(b)

Connect the positive (+) lead from the battery to terminal
6 and the negative (–) lead to terminal 13 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 circuit
breaker operation noise within approximately 4 to 40 se-
conds.

N21207

6

within
60 seconds

13

N21208

within
4 to 40
seconds

3

2

N21209

3

within
60
seconds

2

–

BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

BE–115

1499

1997 LEXUS ES300   (RM511U)

(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.

15.

Front Passenger’s Door Motor:
INSPECT POWER WINDOW MOTOR CIRCUIT
BREAKER OPERATION

(a)

Disconnect the connector from the power window switch.

(b)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 3 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 circuit
breaker operation noise within approximately 4 to 40 se-
conds.

(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.
16.

Rear Left Side Door:
INSPECT POWER WINDOW MOTOR CIRCUIT
BREAKER OPERATION

See step of Front Passenger Door Motor.
17.

Rear Right Side Door:
INSPECT POWER WINDOW MOTOR CIRCUIT
BREAKER OPERATION

See step of Front Passenger Door Motor.