2003 LEXUS LS430 Factory Repair Manual

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Page 1425 of 4500

LEXUS LS430 2003 Factory Repair Manual CIRCUIT DESCRIPTION There may be a short circuit between the CAN bus line and GND when there is resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3. Fig.

Page 1426 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 214: Wiring Diagram - CAN Bus Line For Short To GND (W/ LEXUS Navigation System) (1 Of 2) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Page 1427 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 215: Wiring Diagram - CAN Bus Line For Short To GND (W/ LEXUS Navigation System) (2 Of 2) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.CHECK CAN BUS LINE FOR SHORT TO GN

Page 1428 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 216: Identifying DLC3 Sub Bus Line Connector (J42) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. a. Turn the ignition switch to the LOCK position. b. Disconnect the DLC3 sub bus line connector

Page 1429 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 217: Identifying DLC3 Connector terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. c. Measure the resistance according to the value (s) in the table below. Standard: DLC3 CONNECTOR TERM

Page 1430 of 4500

LEXUS LS430 2003 Factory Repair Manual 3.CHECK CAN BUS LINE FOR SHORT TO GND (CAN BUSES TO D-CAN J/C) Fig. 218: Identifying CAN Main Bus Line Connector (J45) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. a. Disconnect the CAN main bus l

Page 1431 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 219: Identifying DLC3 Connector terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. b. Measure the resistance according to the value (s) in the table below. Standard: DLC3 CONNECTOR TERM

Page 1432 of 4500

LEXUS LS430 2003 Factory Repair Manual 5.CHECK CAN BUS LINE FOR SHORT TO GND (SUSPENSION CONTROL ECU SUB BUS LINE) Fig. 220: Identifying Suspension Control ECU Sub Bus Line Connector (J38) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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