Lexus SC300 / Lexus SC400. Manual — part 177
WIRING DIAGRAM
CIRCUIT INSPECTION
ECU Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power for ECU operation and is also the power source for the slide position sensor.
DIAGNOSTIC CHART
DIAGNOSTIC CHART
Check DOME fuse.
NG
OK
NG
NG
OK
OK
Check for short in all the harness
and components connected to
DOME fuse. (See attached wir-
ing diagram).
Check voltage between terminals SYSB and
GND of ECU connector.
Proceed to next circuit inspection
shown on matrix chart.
Check continuity between terminal GND of
ECU connector and body ground.
Repair or replace harness or
connector.
Check and repair harness or connector
between ECU and battery.
BE–324
–
BODY ELECTRICAL SYSTEM
Power Seat Control System (Passenger’s Seat)
OK
NG
NG
OK
OK
NG
INSPECTION PROCEDURE
1
Check DOME fuse.
Check for short in all the harness and components con-
nected to DOME fuse and repair them (See attached wir-
ing diagram).
2
Check voltage between terminals SYSB and GND of ECU connector.
C
OK
P
Remove ECU with connectors still connected.
Measure voltage between terminals SYSB and GND of
ECU connector.
Voltage:
10 –14 V
Proceed to next circuit inspection shown on matrix chart
(See page
3
Check continuity between terminal GND of ECU connector and body ground.
C
OK
Measure resistance between terminal GND of ECU con-
nector and body ground.
Resistance:
1
or less
Repair or replace harness or connector.
Check and repair harness or connector between
ECU and battery.
–
BODY ELECTRICAL SYSTEM
Power Seat Control System (Passenger’s Seat)
BE–325
Check DOOR fuse.
NG
OK
NG
OK
NG
OK
Check for short in all the harness
and components connected to
the DOOR fuse (See attached
wiring diagram). *
1
Check voltage between terminals +B and
GND of ECU connector.
Proceed to next circuit inspection
shown on matrix chart (See page
Check continuity between terminal GND of
ECU connector and body ground.
Repair or replace harness of
connector.
Check and repair harness or connector
between ECU and battery.
*
1
The power source is supplied to the actuator
(Slide motor) through the passenger’s seat
ECU accordingly, if a short circuit of the W/H
or actuator occurs in the actuator circuit, the
DOOR fuse may become open, so also in-
spect the actuator. (Slide motor circuit on
).
WIRING DIAGRAM
Slide Motor Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for slide motor.
DIAGNOSTIC CHART
DIAGNOSTIC CHART
BE–326
–
BODY ELECTRICAL SYSTEM
Power Seat Control System (Passenger’s Seat)
OK
NG
NG
OK
OK
NG
INSPECTION PROCEDURE
1
Check DOOR fuse.
Check for short in all the harness components con-
nected to the DOOR fuse and repair them (See attached
wiring diagram). *1
2
Check voltage between terminals +B and GND of ECU connector.
C
OK
P
Remove passenger’s seat ECU with connectors still
connected.
Measure voltage between terminals +B and GND of
ECU connector.
Voltage:
10 – 14 V
Proceed to next circuit inspection shown on matrix chart
(See page
3
Check continuity between terminal GND of ECU connector and body ground.
C
OK
Measure resistance between terminal GND of ECU and
body ground.
Resistance:
1
or less
Repair or replace harness or connector.
Check and repair harness or connector between
ECU and battery.
–
BODY ELECTRICAL SYSTEM
Power Seat Control System (Passenger’s Seat)
BE–327
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст