2003 LEXUS LS430 Factory Repair Manual

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LEXUS LS430 2003  Factory Repair Manual a. Disconnect the D25 ECU connector.  
b. Measure the voltage and resistance of the wire harness side connector.  
Standard:  
TESTER CONNECTION AND SPECIFIED CONDITION 
Fig. 20: Identifying D25 Drive

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LEXUS LS430 2003  Factory Repair Manual CIRCUIT DESCRIPTION 
The driver seat ECU receives signals from the power seat control switches and operates each power seat motor 
according to its switch position. 
WIRING DIAGRAM 
Fig. 21: Power Sea

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LEXUS LS430 2003  Factory Repair Manual INSPECTION PROCEDURE 
1.PERFORM ACTIVE TEST USING HAND-HELD TESTER 
a. Connect the hand-held tester (with CAN VIM) to the DLC3.  
b. Turn the ignition switch ON and push the hand-held tester (with CAN

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LEXUS LS430 2003  Factory Repair Manual TESTER CONNECTION AND SPECIFIED CONDITION
Tester connectionSpecified condition
D27-10 (RCL-) - P32-1Below 1ohms
D27-13 (RCL+) - P32-2Below 1ohms
D27-4 (RRV-) - P29-1Below 1ohms
D27-9 (RRV+) - P29-2Bel

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LEXUS LS430 2003  Factory Repair Manual

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LEXUS LS430 2003  Factory Repair Manual Fig. 22: Identifying D27 Driver Seat ECU Connector Terminals And Power Seat Motor Connector 
Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR

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LEXUS LS430 2003  Factory Repair Manual Fig. 23: Position Sensor Wiring Diagram 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003  Factory Repair Manual INSPECTION PROCEDURE 
1.READ VALUE OF HAND-HELD TESTER 
a. Connect the hand-held tester (with CAN VIM) to the DLC3.  
b. Turn the ignition switch ON and press the hand-held tester main switch ON.  
c.