2003 LEXUS LS430 Factory Repair Manual

Page 1289 of 4500

LEXUS LS430 2003  Factory Repair Manual b. Measure the resistance according to the value (s) in the table below.  
Standard:  
CAN MAIN BUS LINE CONNECTOR (J37) TERMINALS RESISTANCE 
OK: REPLACE JUNCTION CONNECTOR (D-CAN J/C)  
NG: GO TO NE

Page 1290 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 83: 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) fr

Page 1291 of 4500

LEXUS LS430 2003  Factory Repair Manual Standard:  
CAN MAIN BUS LINE CONNECTOR (J45) TERMINALS RESISTANCE 
NG: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN-H, CAN-L)  
OK: REPLACE JUNCTION CONNECTOR (P-CAN J/C)  
CIRCUIT DESCRIPTI

Page 1292 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 85: Wiring Diagram - CAN Bus Lines For Short Circuit (W/ Lexus Navigation System) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
INSPECTION PROCEDURE 
1.CHECK CAN BUS LINES FOR SHORT CIRCUIT (DLC

Page 1293 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 86: Disconnecting DLC3 Sub Bus Line Connector (J42) From D-CAN J/C B Side (W/O Earth 
Terminal) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
a. Turn the ignition switch to the LOCK position.

Page 1294 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 87: 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 TERMI

Page 1295 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 88: 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) fr

Page 1296 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 89: 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 TERMI