2003 LEXUS LS430 Factory Repair Manual

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LEXUS LS430 2003  Factory Repair Manual Fig. 18: Multiplex Network Body ECU (Driver Door ECU) Table
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
OK: "ON" (door is open) appears on the screen.  
NG: Go to step 2  
OK: PROCEED TO NEX

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LEXUS LS430 2003  Factory Repair Manual Fig. 19: Identifying Terminals Of Front Door Courtesy Lamp Switch Assy 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPLACE FRONT DOOR COURTESY LAMP SWITCH ASSY  
OK: GO TO NEXT STEP  
3.CHECK W

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LEXUS LS430 2003  Factory Repair Manual Fig. 20: Identifying Terminals Of Front Door Courtesy Lamp Switch Assy LH- Multiplex Network 
Body ECU 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

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LEXUS LS430 2003  Factory Repair Manual OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS 
TABLE  
1.CHECK KEY REMINDER WARNING SYSTEM 
a. Check that the key reminder warning buzzer sounds. 
1. Close the driver side door, ins

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LEXUS LS430 2003  Factory Repair Manual Fig. 21: Identifying Terminals Of Unlock Warning Switch Assy 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
2.INSPECT FRONT DOOR COURTESY LAMP SWITCH ASSY (DRIVER SIDE) 
a. Remove the courtesy lamp sw

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LEXUS LS430 2003  Factory Repair Manual Fig. 22: Identifying Terminals Of Front Door Courtesy Lamp Switch (Driver Side) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
SPECIFIED CONDITION 
If the result is not as specified, replace the switc

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LEXUS LS430 2003  Factory Repair Manual SYSTEM NAME CHART 
System NameSee Procedure
Front Power Seat Control SystemINITIALIZATION

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