Lexus RX300 (MCU15). Service manual - part 346

I03214

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

R

Driver 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

1 (*1)

2 (*2)

3

4

5

D12

D12

D12

D12

D12

2 (*1)

1 (*2)

*1: LHD
*2: RHD

DI–616

–

DIAGNOSTICS

DRIVER 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

DI2BT–11

–

DIAGNOSTICS

DRIVER DOOR CONTROL SYSTEM

DI–617

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–602).

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 driv-
er door ECU.

NG

Repair or replace wireharness or connector.

OK

Proceed to next circuit inspection shown on
problem symptoms table 
(See page DI–602).

I03214

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

R

Driver 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

1 (*1)

2 (*2)

3

4

5

D12

D12

D12

D12

D12

2 (*1)

1 (*2)

*1: LHD
*2: RHD

DI–618

–

DIAGNOSTICS

DRIVER DOOR CONTROL SYSTEM

LEXUS RX300   (RM785E)

Jam protection pulse switch circuit

CIRCUIT DESCRIPTION

Jam protection pulse switch is built–in the power window motor. Pulse switch outputs ON/OFF pulse when
the motor rotates.

WIRING DIAGRAM

DI2BU–11

–

DIAGNOSTICS

DRIVER DOOR CONTROL SYSTEM

DI–619

LEXUS RX300   (RM785E)

INSPECTION PROCEDURE

1

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

NG

Replace the power window motor.

OK

2

Check wireharness and connector between jam protection pulse switch and
driver door ECU.

NG

Repair or replace wireharness or connector.

OK

Proceed to next circuit inspection shown on
problem symptoms table 
(See page DI–602).