1991 LEXUS SC400 Service Repair Manual

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Page 657 of 4087

LEXUS SC400 1991 Service Repair Manual
WIRING DIAGRAM
No.SymbolTerminal NameNo.SymbolTerminal NameNo.SymbolTerminal Name
P11
±1SLDFSlide Switch (Forward)P11±13CHKCheckP10±7IGIgnition Switch
2RCLFReclining Switch (Forward)14SSRRReclinin

Page 658 of 4087

LEXUS SC400 1991 Service Repair Manual
STANDARD VALUE OF ECU TERMINAL
TerminalsSymbolsWiringColorConditionStandard Value
P11±1 eBody
GroundSLDF eBody
Ground
LSeat moved forward using slide SWBelow 1 VL
Others10±14 V
P11±2 eBody
GroundR

Page 659 of 4087

LEXUS SC400 1991 Service Repair Manual

P11±17 SO B Signals between power seat ECU & tilt 0Ve12 V B

P11±17 SO B Signals between power seat ECU & tilt 0Ve12 V B
Signals between ower seat ECU & tilt
telescopic ECU 0 V e12 V
P11±18 SGND BR±B Always Below 1 V
P10±1 GND W±B Always Below 1 V
P10±2 eP10±1 SLD+ eGND Le W±B Seat moved forward using slide SW 10±14 V
Others Below 1 V

P10±3
eP10±1

RCL+
eGND

Y±R
eW±B

Seat moved forward using reclining
SW

10±14 V
Others Below 1 V
P10±4
eP10±1 FRV+ eGND L±Y eW±B Seat raised using front vertical SW 10±14 V
Others Below 1 V
P10±5 +B L±W Always 10±14 V P10±6 eBody Ground STOP eBody Ground Ge W Brake pedal depressed 10±14 V Others (Several or less) Below 1 V P10±7 IG B±R Ignition SW ON 10±14 V P10±8 GND2 W±B Always Below 1 V P10±9 eP10±1 SLD± eGND L±B eW±B Seat moved to rear using slide SW 10±14 V Others Below 1 V
P10±10 eP10±1

RCL± eGND

Y±B eW±B

Seat moved to rear using reclining SW

10±14 V
Others

Below 1 V

P10±11
eP10±1

FRV±
eGND

L±R
eW±B

Seat lowered using front vertical SW

10±14 V
Others Below 1 V
P10±12
eP10±1 RRV± eGND Y±LW±B Seat lowered using rear vertical 10±14 V
Others Below 1 V
P10±13 eP10±1 RRV+ eGND Y±L eW±B Seat raised using rear vertical 10±14 V
Others Below 1 V
P10±14 +B2 L±W Always 10±14 V
P10±15 eBody Ground Pe Body Ground GR Shift lever in ºPº with IG ON 10±14 V
Others (10 or less) Below 1 V
P10±16 ±± ±± ±± ±±
BE±274±
BODY ELECTRICAL SYSTEM Power Seat Control System (Driver's Seat)
WhereEverybodyKnowsYourName

Page 660 of 4087

$LEXUS SC400 1991 Service Repair Manual See page BE±284 BE±28 6 BE±28 8 MATRIX CHART OF PROBLEM SYMPTOMS Perform troubleshooting of the circuits for the applicable problem symptom in t\ he order given in the chart below. Proceed to th$

Page 661 of 4087

LEXUS SC400 1991 Service Repair Manual
BE±292
BE±29 4
BE±29 8
BE±30 0
BE±30 2
BE±30 4
BE±30 6
IN±32
See tilt and telescopic section on page SR±28
See tilt and telescopic section on page SR±28
See tilt and telescopic section on

Page 662 of 4087

LEXUS SC400 1991 Service Repair Manual
LOCATION OF CONNECTORS
Location of Connectors in Engine Compartment
BE±278±
BODY ELECTRICAL SYSTEM Power Seat Control System (Drivers Seat)
WhereEverybodyKnowsYourName

Page 663 of 4087

LEXUS SC400 1991 Service Repair Manual
Location of Connectors in Body
±
BODY ELECTRICAL SYSTEM Power Seat Control System (Drivers Seat)BE±279
WhereEverybodyKnowsYourName

Page 664 of 4087

LEXUS SC400 1991 Service Repair Manual
Location of Connectors in Instrument Panel
BE±280±
BODY ELECTRICAL SYSTEM Power Seat Control System (Drivers Seat)
WhereEverybodyKnowsYourName

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