1991 LEXUS SC400 Service Repair Manual

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Page 777 of 4087

LEXUS SC400 1991 Service Repair Manual
STANDARD VALUE OF ECU TERMINAL

Terminals

Symbols

Wiring
color

Condition

STANDARD VALUE OF ECU TERMINAL

Terminals

Symbols

Wiring
color

Condition

Standard
Value

W8±1
eW8±7

+B1
eE

R±L
eW±B

Wireless door lock main switch ON

10 ~ 14 V

W8±1eW8±7

+B1eE

R±LeW±B

Wireless door lock main switch OFF

Below 1 V
W8±2
eBody LSWD1 eBody L±W eBody Door lock knob of driver's door LOCK 8 ~ 10 V

y
Ground
y
Ground
y
Ground Door lock knob of driver's door UNLOCK Below 1 V
W8±3 eBody LSWP eBody P±B eBody Door lock knob of assistant's door LOCK 8 ~ 10 V

y
Ground
y
Ground
y
Ground Door lock knob of assistant's door UNLOCK Below 1 V

W8 4
eBody

UL1
eBody

GW
eBody

Turn ignition switch ON,
Key operate switch Left and Right UNLOCK

Below 1 V

W8±4
eBody
Ground

UL1
eBody
Ground

G±W
eBody
Ground

Turn ignition switch ON
Key operate switch Left or Right UNLOCK

Below 1 V
Except above mention 8 ~ 10 V

W8±5
eBody

L1
eBody

G±Y
eBody

Turn ignition switch, ON
Key operate switch Right LOCK

Below 1 V

y
Ground

y
Ground

y
Ground

Turn ignition switch ON,
Except above mention

8 ~ 10 V
W8±6
eBody KSW eBody Ye Body Ignition key insert key cylinder Below 1 V

y
Ground

y
Ground

y
Ground
Ignition key pull out key cylinder
10 ~ 14 V

W8±7
eBody
Ground

E
e Body
Ground

W±B
eBody
Ground

Always

Below 1 V

W8±9
eBody

LSWD2
eBody

W±L
eBody

Door lock knob of driver's door LOCK

8 ~ 10 V

y
Ground
y
Ground
y
Ground Door lock knob of driver's door UNLOCK Below 1 V
Door open detection switch Left and Right ON
W8±10
eBody DSWD eBody G±L eBody Door open detection switch Left or Right ON Below 1 V

y
Ground
y
Ground
y
Ground Door open detection switch Left or Right OFF
Door open detection switch Left and Right OFF 10 ~ 14 V
±
BODY ELECTRICAL SYSTEM Wireless Door Lock Control SystemBE±453
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Page 778 of 4087

$LEXUS SC400 1991 Service Repair Manual MATRIX CHART OF PROBLEM SYMPTOMS Perform troubleshooting of the circuits for the applicable problem symptom in t\ he order given in the chart below. Proceed to the page located for each circuit. HIN$

Page 779 of 4087

LEXUS SC400 1991 Service Repair Manual
±MEMO±
±
BODY ELECTRICAL SYSTEM Wireless Door Lock Control SystemBE±455
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Page 780 of 4087

LEXUS SC400 1991 Service Repair Manual
LOCATION OF CONNECTORS
Location of Connectors in Engine Compartment
BE±456±
BODY ELECTRICAL SYSTEM Wireless Door Lock Control System
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Page 781 of 4087

LEXUS SC400 1991 Service Repair Manual
Location of Connectors in Body
±
BODY ELECTRICAL SYSTEM Wireless Door Lock Control SystemBE±457
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Page 782 of 4087

LEXUS SC400 1991 Service Repair Manual
Location of Connectors in Instrument Panel
BE±458±
BODY ELECTRICAL SYSTEM Wireless Door Lock Control System
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Page 783 of 4087

LEXUS SC400 1991 Service Repair Manual
±
BODY ELECTRICAL SYSTEM Wireless Door Lock Control SystemBE±459
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Page 784 of 4087

LEXUS SC400 1991 Service Repair Manual
WIRING DIAGRAM
Check DOME fuse.NG
OK Check for short in all the harness
and components connected to
DOME fuse.
(See attached wiring diagram)
Check voltage between terminals +B and
E of wireless door

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