Lexus RX300 (MCU15). Manual — part 135

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BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

BE–87

LEXUS RX300 (RM785E)

13.

INSPECT REAR RH DOOR 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.

14.

INSPECT DRIVER’S (LHD)/PASSENGER’S (RHD)
DOOR POWER WINDOW MOTOR PTC THERMISTOR
OPERATION

(a)

Disconnect the connector from the power window motor.

(b)

Connect the positive (+) lead from the ammeter to termi-
nal 1 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
2 on the wire harness side connector, and raise the win-
dow to the fully position.

(d)

Continue to apply voltage, and check that the current
changes to less than 1 A with 4 to 90 seconds.

(e)

Disconnect the leads from terminals.

(f)

Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 1 and negative (–) lead
to terminal 2, and check that the window begins to de-
scended.

If operation is not as specified, replace the motor.

15.

INSPECT PASSENGER’S (LHD)/DRIVER’S (RHD)
DOOR POWER WINDOW MOTOR PTC THERMISTOR
OPERATION

(a)

Disconnect the connector from the power window motor.

(b)

Connect the positive (+) lead from the ammeter to termi-
nal 2 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
1 on the wire harness side connector, and raise the win-
dow to the fully position.

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BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

LEXUS RX300 (RM785E)

(d)

Continue to apply voltage and check that the current
changes to less than 1 A within 4 to 90 seconds.

(e)

Disconnect the leads from the terminals.

(f)

Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 2 and the negative (–)
lead to terminal 1, and check that the window begins to
descend.

If operation is not as specified, replace the motor.

16.

INSPECT REAR LH DOOR POWER WINDOW MOTOR
PTC THERMISTOR OPERATION

(a)

Disconnect the connector from the power window motor.

(b)

Connect the negative (–) lead from the ammeter to termi-
nal 3 on the wire harness side connector and the positive
(+) lead to positive terminal of the battery.

(c)

Connect the negative (–) lead from the battery to terminal
1 on the wire harness side connector, and raise the win-
dow to the fully position.

(d)

Continue to apply voltage and check that the current
changes to less than 1 A within 4 to 90 seconds.

(e)

Disconnect the leads from the terminals.

(f)

Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 1 and the negative (–)
lead to terminal 3, and check that the window begins to
descend.

If operation is not as specified, replace the motor.

17.

INSPECT REAR RH DOOR POWER WINDOW MOTOR
PTC THERMISTOR OPERATION

(a)

Disconnect the connector from the power window motor.

(b)

Connect the negative (–) lead from the ammeter to termi-
nal 1 on the wire harness side connector and the positive
(+) lead to positive terminal of the battery.

(c)

Connect the negative (–) lead from the battery to terminal
3 on the wire harness side connector, and raise the win-
dow to the fully position.

(d)

Continue to apply voltage and check that the current
changes to less than 1 A within 4 to 90 seconds.

(e)

Disconnect the leads from the terminals.

(f)

Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 3 and the negative (–)
lead to terminal 1, and check that the window begins to
descend.

If operation is not as specified, replace the motor.

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BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

BE–89

LEXUS RX300 (RM785E)

18.

INSPECT DRIVER’S (LHD)/PASSENGER’S (RHD)
DOOR JAM PROTECTION LIMIT SWITCH OPERA-
TION (Window Up)

(a)

Connect the negative (–) lead from the ohmmeter to ter-
minal 4 and the positive (+) lead to terminal 5.

(b)

Connect the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2.

(c)

Check that the continuity exists when the window goes
up.

(d)

Check that the no continuity exists when the window is in
the fully closed position.

If operation is not as specified, replace the motor.
NOTICE:
If connecting the wire harness wrongly, the sensor might
be damaged so caution is necessary.

19.

INSPECT DRIVER’S (LHD)/PASSENGER’S (RHD)
DOOR JAM PROTECTION LIMIT SWITCH OPERA-
TION (Window Down)

(a)

Connect the negative (–) lead from the ohmmeter to ter-
minal 4 and the positive (+) lead to terminal 5.

(b)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1.

(c)

Check that the continuity exists when the window goes
down.

(d)

Check that the no continuity exists when the window is in
the fully opened position.

If operation is not as specified, replace the motor.
NOTICE:
If connecting the wire harness wrongly, the sensor might
be damaged so caution is necessary.
20.

INSPECT DRIVER’S (LHD)/PASSENGER’S (RHD)
DOOR JAM PROTECTION LIMIT SWITCH CIRCUIT
(See page DI–616)

21.

INSPECT PASSENGER’S (LHD)/DRIVER’S (RHD)
DOOR JAM PROTECTION LIMIT SWITCH OPERA-
TION (Window Up)

(a)

Connect the negative (–) lead from the ohmmeter to ter-
minal 4 and the positive (+) lead to terminal 5.

(b)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 1.

(c)

Check that the continuity exists when the window goes
up.

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BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

LEXUS RX300 (RM785E)

(d)

Check that the no continuity exists when the window is in
the fully closed position.

If operation is not as specified, replace the motor.
NOTICE:
If connecting the wire harness wrongly, the sensor might
be damaged so caution is necessary.

22.

INSPECT PASSENGER’S (LHD)/DRIVER’S (RHD)
DOOR JAM PROTECTION LIMIT SWITCH OPERA-
TION (Window Down)

(a)

Connect the negative (–) lead from the ohmmeter to ter-
minal 4 and the positive (+) lead to terminal 5.

(b)

Connect the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2.

(c)

Check that the continuity exists when the window goes
down.

(d)

Check that the no continuity exists when the window is in
the fully opened position.

If operation is not as specified, replace the motor.
NOTICE:
If connecting the wire harness wrongly, the sensor might
be damaged so caution is necessary.
23.

INSPECT PASSENGER’S (LHD)/DRIVER’S (RHD)
DOOR JAM PROTECTION LIMIT SWITCH CIRCUIT
(See page DI–638)

24.

INSPECT REAR LH DOOR JAM PROTECTION LIMIT
SWITCH OPERATION (Window Up)

(a)

Connect the positive (+) lead from the ohmmeter to termi-
nal 2 and the negative (–) lead to terminal 6.

(b)

Connect the positive (+) lead from the battery to terminal
3 and the negative (–) lead to terminal 1.

(c)

Check that the continuity exists when the window goes
up.

(d)

Check that the no continuity exists when the window is in
the fully closed position.

If operation is not as specified, replace the motor.
NOTICE:
If connecting the wire harness wrongly, the sensor might
be damaged so caution is necessary.