2003 LEXUS LS430 Factory Repair Manual

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Page 2849 of 4500

LEXUS LS430 2003 Factory Repair Manual valves SL1, SL2, S1, S2, S3, S4 and SR which is controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining normal shift solenoid

Page 2850 of 4500

LEXUS LS430 2003 Factory Repair Manual P0983: Range check (High resistance) TYPICAL ENABLING CONDITIONS TABLE - P0983 TYPICAL MALFUNCTION THRESHOLDS P0982: Range check (Low resistance) TYPICAL MALFUNCTION THRESHOLDS TABLE - P0982 P0

Page 2851 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 154: DTC P0985, P0986 - Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT TRANSMISSION WIRE (SR) a. Disconnect the transmission wire connector from th

Page 2852 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 155: Identifying Transmission Wire Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Standard: TRANSMISSION WIRE (SR) - RESISTANCE TABLE NG: Go to step 3 OK: Go to next step 2.CHECK

Page 2853 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 156: Disconnecting Connector From ECM Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Standard: TRANSMISSION WIRE - ECM - RESISTANCE TABLE NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See ELECTR

Page 2854 of 4500

LEXUS LS430 2003 Factory Repair Manual c. Connect positive (+) lead to the terminal of solenoid connector, negative (-) lead to the solenoid body. OK: The solenoid makes an operating noise. Fig. 157: Inspecting Shift Solenoid Valve

Page 2855 of 4500

LEXUS LS430 2003 Factory Repair Manual The linear solenoid valve (SLT) controls the transmission line pressure for smooth transmission operation based on signals from the throttle position sensor and the vehicle speed sensor. The ECM adju

Page 2856 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 159: Identifying Duty Ratio Pattern Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Fig. 160: Identifying Manual Transmission Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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