1991 LEXUS SC400 Service Repair Manual

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Page 721 of 4087

LEXUS SC400 1991 Service Repair Manual
Limit Switch Circuit
CIRCUIT DESCRIPTION
Slide neutral limit switch: this switch is on when passengers seat is slided approx. 120 or more from the mostback position.
Reclining from limit switch: t

Page 722 of 4087

LEXUS SC400 1991 Service Repair Manual
NGOK
OKNG
INSPECTION PROCEDURE
1Check voltage between terminals SLSW, RFSW, RRSW and SGND of ECU connector.
C
OK
PRemove ECU with connector still connected.
Measure voltage between each terminal and

Page 723 of 4087

LEXUS SC400 1991 Service Repair Manual
OKNG
OKNG
WIRING DIAGRAM
3Check each limit switch.
C
OK
PDisconnect limit switch connector.
Check continuity of each terminal of limit switch.
Switch condition Condition Voltage
Slide neutral
limit s

Page 724 of 4087

$LEXUS SC400 1991 Service Repair Manual WIRING DIAGRAM Reclining Switch and Motor Circuit CIRCUIT DESCRIPTION When the power seat switch is turned to forward reclining, the seat back ret\ urns to upright. When the switch is turned to rear$

Page 725 of 4087

LEXUS SC400 1991 Service Repair Manual
OKNG
OKNG
INSPECTION PROCEDURE
1Check voltage between terminals B1 and E1 of power seat switch.
C
OK
PRemove power seat switch with connector still con-
nected.
Measure voltage between terminals B1 a

Page 726 of 4087

LEXUS SC400 1991 Service Repair Manual
OKNG
3Check reclining motor.
C
OK
P
OK
C
(1) Remove seat.
(2) Disconnect reclining motor connector.
Connect battery to terminal 1, and battery to termi-
nal 2 of the reclining motor connector.

Page 727 of 4087

LEXUS SC400 1991 Service Repair Manual
DOOR LOCK CONTROL SYSTEM
±
BODY ELECTRICAL SYSTEM Door Lock Control SystemBE±361
WhereEverybodyKnowsYourName

Page 728 of 4087

$LEXUS SC400 1991 Service Repair Manual DESCRIPTION The door lock control system has a key±interlocked door lock and unlock \ function and a key±confinement pre- vention function. All doors can be locked and unlocked simultaneously by\$

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