2003 LEXUS LS430 Factory Repair Manual

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Page 3249 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 20: Identifying Waveform 2 Graph Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. WAVEFORM 2 REFERENCE TABLE 1.DESCRIPTION a. The ECM controls the vehicle's immobilizer system functions. Immo

Page 3250 of 4500

LEXUS LS430 2003 Factory Repair Manual The vehicle uses the ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format. Fig. 21: Identifying DLC3 Connector Terminal

Page 3251 of 4500

LEXUS LS430 2003 Factory Repair Manual attempt to use the hand-held tester. If the screen displays the message UNABLE TO CONNECT TO VEHICLE, there is a problem either with the vehicle or with the tester. If communication is normal when t

Page 3252 of 4500

LEXUS LS430 2003 Factory Repair Manual c. Read the DTCs by following the directions on the tester screen. Fig. 23: Connecting Hand -Held Tester To DLC3 Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. HINT: Refer to the hand-held tester op

Page 3253 of 4500

LEXUS LS430 2003 Factory Repair Manual 1.DATA LIST HINT: Using the hand-held tester's DATA LIST allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshoot

Page 3254 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 24: Theft Warning ECU Assy Data List Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 2.ACTIVE TEST HINT: Performing the hand-held tester's ACTIVE TEST allows relay, VSV, actuator and other i

Page 3255 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 25: Transponder Key ECU DTC Chart Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 2.ECM DTC CHART Fig. 26: ECM DTC Chart Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. CIRCUIT DESCRIPTION This

Page 3256 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 27: DTC Reference Chart Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. WIRING DIAGRAM Fig. 28: DTC B2780 - Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.
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