Page 665 of 4087
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BODY ELECTRICAL SYSTEM Power Seat Control System (Driver's Seat)BE±281
WhereEverybodyKnowsYourName
Page 666 of 4087
Location of Connectors in Seat
BE±282±
BODY ELECTRICAL SYSTEM Power Seat Control System (Driver's Seat)
WhereEverybodyKnowsYourName
Page 667 of 4087
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BODY ELECTRICAL SYSTEM Power Seat Control System (Driver's Seat)BE±283
WhereEverybodyKnowsYourName
Page 668 of 4087
CIRCUIT INSPECTION
+B Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for motors such as the slide motor and reclining mo\
tor.
DIAGNOSTIC CHARTDIAGNOSTIC CHART
Check Door fuse.NG
Check for short in all harness and
components connected to the
DOOR fuse (See attached wiring
diagram).
Check voltage between terminals +B, +B2
and GND of ECU connector. OK
OKProceed to next circuit inspection
shown on matrix chart (See page
BE±276
).
Check continuity between terminal GND
of ECU connector and body ground. NG
NGRepair or replace harness or
connector.
OK
Check and repair harness or connector
between ECU and battery.
WIRING DIAGRAM
BE±284±
BODY ELECTRICAL SYSTEM Power Seat Control System (Driver's Seat)
WhereEverybodyKnowsYourName
Page 669 of 4087
OKNG
NGOK
OKNG
INSPECTION PROCEDURE
1Check DOOR fuse.
Check for short in all the harness and components con-
nected to the DOOR fuse (See attached wiring diagram).
2Check voltage between terminals +B, +B2 and GND of ECU connector.
C
OK
PRemove ECU with connectors still connected.
Measure voltage between terminals +B, +B2 and GND
of ECU connector.
Voltage: 10 ± 14 V
Proceed to next circuit inspection shown on matrix chart
(See page BE±276.)
3Check 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.
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BODY ELECTRICAL SYSTEM Power Seat Control System (Driver's Seat)BE±285
WhereEverybodyKnowsYourName
Page 670 of 4087
WIRING DIAGRAM
ECU Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power for ECU operation and is also the power source f\
or the sensors.
DIAGNOSTIC CHARTDIAGNOSTIC CHART
Check DOME fuse.NGCheck for short in all the harness
and components connected to
DOME fuse.
(See attached wiring diagram).
OK
Check voltage between terminals SYSB
and SGND of ECU connector. Proceed to next circuit inspection
shown on matrix chart
(See page
BE±276).
Check continuity between terminal SGND
of ECU connector and body ground. OK
NG
OK NG
Replace or repair harness or
connector.
Check and repair harness or connector
between ECU and battery.
BE±286±
BODY ELECTRICAL SYSTEM Power Seat Control System (Driver's Seat)
WhereEverybodyKnowsYourName
Page 671 of 4087
OKNG
NGOK
OKNG
INSPECTION PROCEDURE
1Check DOME fuse.
Check for short in all the harness and components con-
nected to the DOME fuse (See attached wiring diagram).
2Check voltage between terminals SYSB and SGND of ECU connector.
C
OK
PRemove ECU with connectors still connected.
Measure voltage between terminals SYSB and SGND
of ECU connector.
Voltage: 10 ± 14 V
Proceed to next circuit inspection shown on matrix chart
(See page BE±276).
3Check continuity between terminal SGND of ECU connector and body ground.\
C
OK
Measure resistance between terminal SGND of ECU
connector and body ground.
Resistance: 1 or less.
Repair or replace harness or connector.
Check and repair harness or connector between
ECU and battery.
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BODY ELECTRICAL SYSTEM Power Seat Control System (Driver's Seat)BE±287
WhereEverybodyKnowsYourName
Page 672 of 4087
WIRING DIAGRAM
Motor Circuit
CIRCUIT DESCRIPTION
The driver's seat ECU controls the 4 motors for slide, front vertical, rear vertica\
l and reclining.
DIAGNOSTIC CHARTDIAGNOSTIC CHART
Inspect the circuit of the motor which is malfunctioning.
Check motor.NG Replace motor.
OK
Check harness and connector between
ECU and motor (See page IN±27). NG
OK Repair or replace harness or
connector.
Proceed to next circuit inspection shown
on matrix chart (See page BE±276).
BE±288
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BODY ELECTRICAL SYSTEM Power Seat Control System (Driver's Seat)
WhereEverybodyKnowsYourName