Lexus SC300 / Lexus SC400. Manual — part 185
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Terminals
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Symbols
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Wiring
Color
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Condition
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Standard Value
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T9–19
↔
T9–16
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TSW
↔
E
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L
↔
W–B
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Luggage compartment door opener switch ON.
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1
or less
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Luggage compartment door opener switch
OFF.
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1 M
or higher
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T9–20
↔
T9–16
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+B1
↔
E
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R
↔
W–B
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Always
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10–14 V
O
When checking the voltage or resistance of theft deterrent and door lock ECU terminal, disconnect
the ECU connector.
BE–370
–
BODY ELECTRICAL SYSTEM
Door Lock Control System
MATRIX CHART OF PROBLEM SYMPTOMS
Perform troubleshooting of the circuits for the applicable problem symptom in the order given in the chart below.
Proceed to the page located for each circuit.
HINT:
If the instruction “Proceed to next circuit inspection shown on matrix chart” is given in the flow chart for each
circuit, proceed to the circuit with the next highest number in the table to continue the check.
If the trouble still reappears even though there are no abnormalities in any of the other circuits, then check
or replace the Theft Deterrent and Door Lock ECU as the last step.
See page
BE–376
BE–378
BE–380
BE–382
BE–384
BE–386
BE–388
BE–390
BE–392
IN–32
Symptom
Suspect Area
ECU Power Source Circuit
Actuator Power Source Circuit
Door Lock Motor Circuit
Luggage Compartment Door Opener Motor
Circuit
Door Lock Control Switch Circuit
Door key Lock and Unlock Switch Circuit
Key Unlock W
arning
Switch
Circuit
Luggage Compartment Door Opener Main
Switch and Opener Switch Circuit
Door Open Detection Switch Circuit
Theft Deterrent and Door Lock ECU
Whole functions of the door lock control system does not
Whole functions of the door lock control system does not
t
1
2
4
3
5
operate.
1
2
4
3
5
All doors or some doors are not locked and unlocked with the
All doors or some doors are not locked and unlocked with the
Door Lock Control Switch and Key operated Switch
Door Lock Control Switch and Key operated Switch.
(Luggage compartment door opener function normally oper
3
1
2
4
(Luggage compartment door opener function normally oper-
t )
3
1
2
4
ate.)
Doors cannot be locked or unlocked with the door lock con-
Doors cannot be locked or unlocked with the door lock con
trol switch. (Doors lock and unlock normally with the key op-
1
2
3
4
(
y
y
erated switch.)
1
2
3
4
Doors are not locked or unlocked with the key operated
Doors are not locked or unlocked with the key o erated
switch. (Doors lock and unlock normally with the door lock
1
2
(
y
control switch.)
1
2
Key confinement prevention function does not operate
Key confinement prevention function does not operate.
1
2
3
y
Doors lock and unlock normally with the key operated switch
1
2
3
Doors lock and unlock normally with the key operated switch.
Luggage compartment door opener function does not oper-
Luggage compartment door opener function does not oper-
t
2
1
3
ate.
2
1
3
–
BODY ELECTRICAL SYSTEM
Door Lock Control System
BE–371
Location of Connectors
Location of Connectors in Engine Compartment
BE–372
–
BODY ELECTRICAL SYSTEM
Door Lock Control System
Location of Connectors in Body
–
BODY ELECTRICAL SYSTEM
Door Lock Control System
BE–373
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