2003 LEXUS LS430 Factory Repair Manual

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Page 153 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 115: ABS Warning Light Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT CAN COMMUNICATION SYSTEM

Page 154 of 4500

LEXUS LS430 2003 Factory Repair Manual a. Is the DTC output for CAN communication system? Result: DTC OUTPUT DESCRIPTION B: REPAIR CAN COMMUNICATION SYSTEM (SEE PRECAUTION ) A: Go to next step 2.INSPECT MULTIPLEX COMMUNICATION SY

Page 155 of 4500

LEXUS LS430 2003 Factory Repair Manual CIRCUIT DESCRIPTION If the ECU stores DTC, the VSC warning light comes on in the combination meter. The skid control ECU is connected to the combination meter via CAN and MPX communications. WIRING

Page 156 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 116: VSC Warning Light Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.CHECK DTC a. Is DTC output for ABS, VSC, CAN and/or MPX?

Page 157 of 4500

LEXUS LS430 2003 Factory Repair Manual Standard: DTC OUTPUT DESCRIPTION B: REPAIR CIRCUIT INDICATED BY OUTPUT DTC A: Go to next step 2.INSPECT SKID CONTROL ECU CONNECTOR (SEE REPLACEMENT ) a. Check the ECU connector's connecti

Page 158 of 4500

LEXUS LS430 2003 Factory Repair Manual d. Check the voltage condition output from the ECU displayed on the hand-held tester. OK: Go to next step "Normal" is displayed. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

Page 159 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 118: Identifying Skid Control ECU Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT ) CIRCUIT DESCRIPTION If the ECU stores DT

Page 160 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 119: VSC Warning Light Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT CAN COMMUNICATION SYSTEM a. Is the DTC output for CAN communication s ystem?
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