2003 LEXUS LS430 Diagram AC

Fig. 3: System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
COMMUNICATION LINE REFERENCE
1.FUEL LID OPENER SYSTEM COMPONENT
FUEL LID OPENER SYSTEM COMPONENT
SenderReceiverSignalCommunication Line
Driver Side J/B ECUTheft Warning ECUFuel lid opener switch
signalBEAN
Theft Warning ECULuggage Room J/B ECUFuel lid open output
request signalBEAN
Luggage Room J/B ECUMeter ECUFuel lid opener activation
signalBEAN
ComponentsFunction
Theft Warning ECUReceives door lock status data and other data using door system bus
(BEAN) and uses these data to judge if fuel lid can be opened or not. When
judgment is made that fuel lid can be opened, theft warning ECU outputs

Luggage room J/B ECU:
LUGGAGE ROOM J/B ECU
CIRCUIT DESCRIPTION
This circuit provides power to operate the luggage room J/B ECU.
WIRING DIAGRAM
The wirin
g diagram is shown on the next page.
ItemTest DetailsDiagnostic Note
FUEL LID OPENOperate fuel lid opener motor OFF/ON-

Fig. 12: Wiring Diagram - Luggage Room J/B ECU Power Source Circuit
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OK:
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

CIRCUIT DESCRIPTION
The circuit opens the fuel lid when the ECU sends signals to the fuel lid opener switch.
WIRING DIAGRAM
Fig. 14: Wiring Diagram
- Fuel Lid Opener Switch Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.READ VALUE OF DATA LIST (FUEL LID OPENER SWITCH)
a. Check the DATA LIST for proper functioning of the fuel lid opener switch.
Driver side J/B ECU:

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS
TABLE
CIRCUIT DESCRIPTION
The circuit opens the fuel lid when the ECU sends signals to the fuel lid opener switch.
WIRING DIAGRAM
Fig. 17: Wiring Diagram
- Fuel Lid Opener Motor Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.PERFORM ACTIVE TEST (FUEL LID OPEN)
a. Select the ACTIVE TEST, use the hand-held tester to generate a control command, and then check
the fuel lid opener motor.
Luggage room J/B ECU:
LUGGAGE ROOM J/B ECU

LOCATION
Fig. 1: Identifying Fuel System Component Location

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SYSTEM DIAGRAM

Fig. 2: Fuel System - System Diagram (1 Of 3)
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Fuel s
ystem is determined by the ECM based on signals from various sensors.

Fig. 3: Fuel System - System Diagram (2 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.