Lexus SC300 / Lexus SC400. Manual — part 196
Location of Connectors in Body
–
BODY ELECTRICAL SYSTEM
Wireless Door Lock Control System
BE–457
Location of Connectors in Instrument Panel
BE–458
–
BODY ELECTRICAL SYSTEM
Wireless Door Lock Control System
–
BODY ELECTRICAL SYSTEM
Wireless Door Lock Control System
BE–459
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 lock ECU connector.
Check for open in harness and connector
between terminal E of ECU and body
ground (See page
Check and repair harness and connector
between ECU and main switch, main
switch and battery.
Check wireless door lock main switch.
Proceed to next circuit inspec-
tion shown on matrix chart
(See page
Repair or replace harness or
connector.
Replace wireless door lock main
switch.
NG
NG
NG
OK
OK
OK
1
2
3
4
CIRCUIT INSPECTION
ECU Power Source Circuit
CIRCUIT DESCRIPTION
When the wireless door lock main switch is ON, battery voltage is applied to terminal +B of the
wireless door lock ECU, causing the ECU to operate.
When the wireless door lock main switch is OFF, battery voltage is not applied to terminal +B and the
ECU does not operate.
DIAGNOSTIC CHART
BE–460
–
BODY ELECTRICAL SYSTEM
Wireless Door Lock Control System
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