2003 LEXUS LS430 Factory Repair Manual

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Page 3241 of 4500

LEXUS LS430 2003 Factory Repair Manual 2.CHECK TRANSPONDER KEY ECU ASSY Fig. 13: Identifying T9 ECU Connector Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. a. Disconnect the T9 ECU connector. b. Measure the voltage and resis

Page 3242 of 4500

LEXUS LS430 2003 Factory Repair Manual If the result is not as specified, there may be a malfunction on the wire harness side. c. Reconnect the T9 ECU connector. d. Measure the voltage of the connector. Standard: TRANSPONDER KEY ECU

Page 3243 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 14: Identifying Waveform 1 Graph Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. WAVEFORM 1 REFERENCE TABLE Waveform 2 (Reference): TerminalTXCT - GND Tool Setting5 V/DIV., 20 ms/DIV. Condition

Page 3244 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 15: Identifying Waveform 2 Graph Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. WAVEFORM 2 REFERENCE TABLE Waveform 3 (Reference): TerminalCODE - GND Tool Setting10 V/DIV., 20 ms/DIV. Conditio

Page 3245 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 16: Identifying Waveform 3 Graph Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. WAVEFORM 3 REFERENCE TABLE Waveform 4 (Reference): TerminalEFIO - GND Tool Setting10 V/DIV., 500 ms/DIV. Conditi

Page 3246 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 17: Identifying Waveform 4 Graph Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. WAVEFORM 4 REFERENCE TABLE 3.CHECK ECM TerminalEFII - GND Tool Setting10 V/DIV., 500 ms/DIV. ConditionIgnition sw

Page 3247 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 18: Identifying ECM Connectors Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. a. Disconnect the E2 and E4 ECM connectors. b. Measure the voltage and resistance of the wire harness side connector

Page 3248 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 19: Identifying Waveform 1 Graph Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. WAVEFORM 1 REFERENCE TABLE Waveform 2 (Reference): TerminalIMI - GND Tool Setting10 V/DIV., 500 ms/DIV. Conditio
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