2003 LEXUS LS430 Factory Repair Manual

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LEXUS LS430 2003  Factory Repair Manual a. Disconnect the television camera ECU sub bus line connector (J52) from the LUG-CAN J/C A side 
(w/earth terminal). 
Fig. 251: Identifying DLC3 Connector terminals
 
Courtesy of TOYOTA MOTOR SALES,

Page 1466 of 4500

LEXUS LS430 2003  Factory Repair Manual 44.CONNECT CONNECTOR 
a. Reconnect the television camera ECU sub bus line connector (J52) to the LUG-CAN J/C A side 
(w/earth terminal).  
45.CHECK CAN BUS LINE FOR SHORT TO GND 
Fig. 252: Identifying

Page 1467 of 4500

LEXUS LS430 2003  Factory Repair Manual NG: REPAIR OR REPLACE SEAT BELT CONTROL ECU SUB BUS LINE OR CONNECTOR
OK: REPLACE SEAT BELT CONTROL ECU  
CIRCUIT DESCRIPTION 
There may be a short circuit between the CAN bus line and GND when there

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LEXUS LS430 2003  Factory Repair Manual Fig. 254: Wiring Diagram - CAN Bus Line For Short To GND (W/O LEXUS Navigation System) (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003  Factory Repair Manual Fig. 255: Wiring Diagram - CAN Bus Line For Short To GND (W/O 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

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LEXUS LS430 2003  Factory Repair Manual Fig. 256: 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

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LEXUS LS430 2003  Factory Repair Manual Fig. 257: 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 1472 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 258: Disconnecting CAN Main Bus Line Connector (J45) From P-CAN J/C A Side (W/Earth 
Terminal) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
a. Disconnect the CAN main bus line connector (J45) f