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).
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