Lexus ES300 (1997 year). Manual - part 126

BE05N–02

N21194

1

2

3

4

5

6

7

8

9

10

11

12

13

14

BE–110

–

BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

1494

1997 LEXUS ES300   (RM511U)

INSPECTION

1.

INSPECT POWER WINDOW MASTER SWITCH CON-
TINUITY

(a)

Inspect the front driver’s switch.

Window unlock:

Switch position

Tester connection

Specified condition

UP

    1 – 13          6 – 7

Continuity

OFF

1 – 6 – 13

Continuity

DOWN

    1 – 6          7 – 13

Continuity

Window lock:

Switch position

Tester connection

Specified condition

UP

    1 – 13          6 – 7

Continuity

OFF

1 – 6 – 13

Continuity

DOWN

    1 – 6          7 – 13

Continuity

If continuity is not as specified, replace the master switch.
(b)

Inspect the front passenger’s switch.

Window unlock:

Switch position

Tester connection

Specified condition

UP

    1 – 5          7 – 12

Continuity

OFF

1 – 5 – 12

Continuity

DOWN

    1 – 12          5 – 7

Continuity

Window lock:

Switch position

Tester connection

Specified condition

UP

7 – 12

Continuity

OFF

5 – 12

Continuity

DOWN

5 – 7

Continuity

If continuity is not as specified, replace the master switch.
(c)

Inspect the rear left switch.

Window unlock:

Switch position

Tester connection

Specified condition

UP

    1 – 9          7 – 10

Continuity

OFF

1 – 9 – 10

Continuity

DOWN

    1 – 10          7 – 9

Continuity

Window lock:

Switch position

Tester connection

Specified condition

UP

7 – 10

Continuity

OFF

9 – 10

Continuity

DOWN

7 – 9

Continuity

If continuity is not as specified, replace the master switch.
(d)

Inspect the rear right switch.

Window unlock:

Switch position

Tester connection

Specified condition

UP

    1 – 14          7 – 11

Continuity

OFF

1 – 11 – 14

Continuity

DOWN

    1 – 11          7 – 14

Continuity

N21195

1

7

N21196

1

7

N21197

6

13

N21198

13

6

–

BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

BE–111

1495

1997 LEXUS ES300   (RM511U)

Window lock:

Switch position

Tester connection

Specified condition

UP

7 – 11

Continuity

OFF

11 – 14

Continuity

DOWN

7 – 14

Continuity

If continuity is not as specified, replace the master switch.

2.

INSPECT POWER WINDOW MASTER SWITCH ILLU-
MINATION

(a)

Set the window lock switch to the unlock position.

(b)

Connect the positive (+) lead from the battery to terminal
7 and the negative (–) lead to terminal 1, and check that
all the illuminations light up.

(c)

Set the window lock switch to the lock position, check that
all the passenger’s power window switch illuminations go
out.

If operation is not as specified, replace the master switch.

3.

INSPECT ONE TOUCH POWER WINDOW SYSTEM/
CURRENT OF CIRCUIT (Using an ammeter)

(a)

Disconnect the connector from the master switch.

(b)

Connect the positive (+) lead from the ammeter to termi-
nal 6 on the wire harness side connector and the negative
(–) lead to negative (–) terminal of the battery.

(c)

Connect the positive (+) lead from the battery to terminal
13 on the wire harness side connector.

(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 the operation is as specified, replace the master switch.

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.