Lexus RX300 (MCU15). Service manual - part 351

I03214

P8
Power Window Motor RH (*1)
P7
Power Window Motor LH (*2)

R

Passenger Door ECU

G

UP

DN

PLS

LMT

SGND

1

15

20

8

12

LG–B

LG

LG–R

Power Window
Motor

Pulse Sensor

Limit SW

2 (*1)

1 (*2)

3

4

5

F17

F17

F17

F17

F17

1 (*1)

2 (*2)

*1: LHD
*2: RHD

DI–636

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

LEXUS RX300   (RM785E)

Power window motor circuit

WIRING DIAGRAM

DI2F4–09

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

DI–637

LEXUS RX300   (RM785E)

INSPECTION PROCEDURE

HINT:
In case of using the hand–held tester, start the inspection from step 1 and in case of not using the hand–held
tester, start from step 2.

1

Check power window motor using hand–held tester.

PREPARATION:
Connect the hand–held tester to the DLC 3.
CHECK:
Check that the power window motor can operate in an ACTIVE TEST.

OK

Proceed to next circuit inspection shown on
problem symptoms table (See page DI–624).

NG

2

Check power window motor (See page BE–84).

NG

Replace the power window motor.

OK

3

Check wireharness and connector between power window motor and passenger
door ECU.

NG

Repair or replace wireharness or connector.

OK

Proceed to next circuit inspection shown on
problem symptoms table 
(See page DI–624).

I03214

P8
Power Window Motor RH (*1)
P7
Power Window Motor LH (*2)

R

Passenger Door ECU

G

UP

DN

PLS

LMT

SGND

1

15

20

8

12

LG–B

LG

LG–R

Power Window
Motor

Pulse Sensor

Limit SW

2 (*1)

1 (*2)

3

4

5

F17

F17

F17

F17

F17

1 (*1)

2 (*2)

*1: LHD
*2: RHD

DI–638

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

LEXUS RX300   (RM785E)

Jam protection limit switch circuit

CIRCUIT DESCRIPTION

Jam protection limit switch is built–in the power window motor. This switch functions to turn ”OFF” before the
top dead center, and ECU reads this ”OFF” signal resulting in closing the window fully.

WIRING DIAGRAM

DI2F5–06

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

DI–639

LEXUS RX300   (RM785E)

INSPECTION PROCEDURE

HINT:
In case of using the hand–held tester, start the inspection from step 1 and in case of not using the hand–held
tester, start from step 2.

1

Check jam protection limit switch using hand–held tester.

PREPARATION:
Connect the hand–held tester to the DLC 3.
CHECK:
Check the jam protection limit switch using DATA LIST.

OK

Proceed to next circuit inspection shown on
problem symptoms table (See page DI–624).

NG

2

Check jam protection limit switch (See page BE–84).

NG

Replace the power window motor.

OK

3

Check wireharness and connector between jam protection limit switch and pas-
senger door ECU.

NG

Repair or replace wireharness or connector.

OK

Proceed to next circuit inspection shown on
problem symptoms table 
(See page DI–624).