Lexus RX300 (MCU15). Service manual — part 343
DI–604
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
LEXUS RX300 (RM785E)
INSPECTION PROCEDURE
1
Check ECU–B, GAUGE and FR DOOR fuse.
CHECK:
Check continuity of ECU–B,GAUGE and FR DOOR fuse.
OK:
Continuity
NG
Replace the failure fuse.
OK
2
Check voltage between terminals BDR,CPUB, SIG and GND of driver door ECU
connector.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals SIG, and GND.
OK:
Voltage: 10 – 14V
PREPARATION:
(a)
Turn ignition switch OFF.
(b)
Disconnect the driver door ECU connector.
CHECK:
Measure voltage between terminals BDR, CPUB and GND.
OK:
Voltage: 10 – 14V
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page DI–602).
NG
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
DI–605
LEXUS RX300 (RM785E)
3
Check wireharness and connector between ECU and body ground.
NG
Repair or replace wireharness or connector.
OK
Check and repair wireharness and connector
between ECU and battery.
I19265
Driver Door ECU
LSWE
A–
A+
LSW
24
2
16
L–R
6
19
KL
KUL
13
L–Y
GR–R
GR
P
P–L
4 (*1)
D7 (*1)
D8 (*2)
Door Lock Motor LH
Door Lock Motor
Door Unlock
Detection Switch
Door Key Lock and
Unlock Switch
D12
D12
D12
D12
D12
D12
2 (*2)
3 (*1)
1 (*2)
7 (*1)
6 (*2)
8 (*1)
5 (*2)
2 (*1)
3 (*2)
1 (*1)
4 (*2)
*1: LHD
*2: RHD
DI–606
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
LEXUS RX300 (RM785E)
Door lock motor circuit
WIRING DIAGRAM
DI2BO–06
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
DI–607
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 door lock motor using hand–held tester.
PREPARATION:
Connect the hand–held tester to the DLC 3.
CHECK:
Check that the door lock motor can operate in an ACTIVE TEST.
OK
Proceed to next circuit inspection shown on
problem symptom table (See page DI–570).
NG
2
Check door lock motor (See page BE–97).
NG
Replace the door lock motor.
OK
3
Check wireharness and connector between door lock motor 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–570).
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