2003 LEXUS LS430 Factory Repair Manual

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Page 2769 of 4500

LEXUS LS430 2003 Factory Repair Manual OK: Gear position changes in accordance with the tester command NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSY (See step 6 on REPLACEMENT ) OK: Go to next step 3.CLEAR THE DTC AND RUNNIN

Page 2770 of 4500

LEXUS LS430 2003 Factory Repair Manual Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. MONITOR DESCRIPTION This DTC indicates an open or short in the shift solenoid valve SL1 circuit. The ECM commands gearshift by turning the shift solenoid

Page 2771 of 4500

LEXUS LS430 2003 Factory Repair Manual TYPICAL MALFUNCTION THRESHOLDS TABLE COMPONENT OPERATING RANGE COMPONENT OPERATING RANGE TABLE WIRING DIAGRAM Fig. 89: DTC P0748 - Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSP

Page 2772 of 4500

LEXUS LS430 2003 Factory Repair Manual TRANSMISSION WIRE - RESISTANCE TABLE c. Measure the resistance according to the value(s) in the table below. Fig. 90: Identifying Transmission Wire Connector Terminals Courtesy of TOYOTA MOTOR SALE

Page 2773 of 4500

LEXUS LS430 2003 Factory Repair Manual NG: Go to step 3 OK: Go to next step 2.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) a. Connect the transmission connector to the transmission. b. Disconnect the connector from the ECM.

Page 2774 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 93: Tester Connection Reference Chart Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ) OK: REPLACE ECM (

Page 2775 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 94: Inspecting Shift Solenoid Valve (SL1) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. NG: REPLACE SHIFT SOLENOID VALVE (SL1)

Page 2776 of 4500

LEXUS LS430 2003 Factory Repair Manual OK: REPAIR OR REPLACE TRANSMISSION WIRE (See step 5 on REPLACEMENT) DTC P0751: SHIFT SOLENOID "A" PERFORMANCE (SHIFT SOLENOID VALVE S1) SYSTEM DESCRIPTION The ECM uses signals from the outpu
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