2003 LEXUS LS430 Factory Repair Manual

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Page 3257 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 29: Transponder Key ECU Assy Data List Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: "ON" (Key is in ignition key cylinder) appears on the screen. NG: Go to step 2 OK: REPLACE TR

Page 3258 of 4500

LEXUS LS430 2003 Factory Repair Manual Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Standard: UNLOCK WARNING SWITCH - RESISTANCE TABLE NG: REPLACE UNLOCK WARNING SWITCH ASSY OK: Go to next step 3.CHECK WIRE HARNESS (UNLOCK WARNING S

Page 3259 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 31: Identifying U7 Switch Connector Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Standard: UNLOCK WARNING SWITCH - BODY GROUND - RESISTANCE TABLE NG: REPAIR OR REPLACE HARNESS AND

Page 3260 of 4500

LEXUS LS430 2003 Factory Repair Manual 4.CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY - UNLOCK WARNING SWITCH ASSY) a. Disconnect the T9 ECU connector. b. Disconnect the U7 switch connector. c. Measure the resistance of the wire harn

Page 3261 of 4500

LEXUS LS430 2003 Factory Repair Manual

Page 3262 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 32: Identifying U7 Switch And T9 ECU Connector Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Standard: TRANSPONDER KEY ECU - UNLOCK WARNING SWITCH - RESISTANCE TABLE NG: REPAIR OR R

Page 3263 of 4500

LEXUS LS430 2003 Factory Repair Manual INSPECTION PROCEDURE REPLACE KEY CIRCUIT DESCRIPTION This DTC is output when a key with a key code that has not been registered in the ECU is inserted into the ignition key cylinder. DTC REFEREN

Page 3264 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 34: DTCs B2796, B2798 - Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.READ DATA LIST USING HAND-HELD TESTER a. Connect the hand-held tester to the CAN VIM
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