2003 LEXUS LS430 Factory Repair Manual

Page 4089 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 15: >Identifying Terminals Of Fuel Lid Opener Switch 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
OK: GO TO NEXT STEP

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LEXUS LS430 2003  Factory Repair Manual 3.CHECK WIRE HARNESS (DRIVER SIDE J/B ECU - FUEL LID OPENER SWITCH AND 
BODY GROUND) 
a. Disconnect the D6 ECU connector.  
b. Disconnect the F12 switch connector.  
c. Measure the resistance of the w

Page 4091 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 16: Identifying Terminals Of Driver Side J/B ECU - Fuel Lid Opener Switch 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Page 4092 of 4500

LEXUS LS430 2003  Factory Repair Manual 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

Page 4093 of 4500

LEXUS LS430 2003  Factory Repair Manual OK: Fuel lid opener is opened.  
NG: Go to step 2  
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS 
TABLE  
2.INSPECT FUSE (FUEL OPN) 
a. Remove the FUEL OPN fuse from the luggage ro

Page 4094 of 4500

LEXUS LS430 2003  Factory Repair Manual <0029004c004a001100030014001b001d00030026004b00480046004e004c0051004a0003003200530048005500440057004c005200510003003200490003002900580048004f0003002f004c00470003003200530048005100480055000300300052005

Page 4095 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 19: Identifying Terminals Of Luggage Room J/B - Fuel Lid Opener Motor Assy And Body 
Ground 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Page 4096 of 4500

LEXUS LS430 2003  Factory Repair Manual OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS 
TABLE  
1.CHECK FUEL LID OPENER SYSTEM 
a. Pull the fuel lid opener switch and check that the fuel lid opens.  
HINT: 
While the theft