LEXUS LS430 2003 Factory Owner's Guide
LS430 2003
LEXUS
LEXUS
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LEXUS LS430 2003 Factory Owner's Guide
Page 1238 of 4500
NG-A: CHECK CAN MAIN BUS LINE FOR DISCONNECTION (W/O LEXUS NAVIGATION
SYSTEM)
NG-B: CHECK CAN MAIN BUS LINE FOR DISCONNECTION (W/ LEXUS NAVIGATION
SYSTEM)
NG-C: CHECK CAN BUS LINES FOR SHORT CIRCUIT (W/O LEXUS NAVIGATION
SYSTEM)
NG-D: CHECK CAN BUS LINES FOR SHORT CIRCUIT (W/ LEXUS NAVIGATION SYSTEM)
OK: GO TO NEXT STEP
2.CHECK CAN BUS LINE FOR SHORT TO +B
Fig. 34: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
D1-6 (CANH) - D1-14
(CANL)Ignition Switch
OFF54 ohms or less (w/ LEXUS Navigation
System)NG-D
Page 1239 of 4500
a. Measure the resistance according to the value (s) in the table below.
Standard:
ECM CONNECTOR TERMINALS RESISTANCE
HINT:
NG-A: w/o LEXUS Navigation System.
NG-B: w/ LEXUS Navigation System.
NG-A: CHECK CAN BUS LINE FOR SHORT TO +B (W/O LEXUS NAVIGATION SYSTEM)
NG-B: CHECK CAN BUS LINE FOR SHORT TO +B (W/ LEXUS NAVIGATION SYSTEM)
OK: GO TO NEXT STEP
3.CHECK CAN BUS LINE FOR SHORT TO GND
Tester ConnectionConditionSpecified value
D1-6 (CANH) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more
D1-14 (CANL) - D1-16 (BAT)Ignition Switch OFF1 Mohms or more
Page 1240 of 4500
Fig. 35: Identifying DLC3 Connector terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Measure the resistance according to the value (s) in the table below.
Standard:
ECM CONNECTOR TERMINALS RESISTANCE
HINT:
NG-A: w/o LEXUS Navigation System.
NG-B: w/ LEXUS Navigation System.
NG-A: CHECK CAN BUS LINE FOR SHORT TO GND (W/O LEXUS NAVIGATION SYSTEM)
Tester ConnectionConditionSpecified value
D1-4 (CG) - D1-6 (CANH)Ignition Switch OFF1 kohms or more
D1-4 (CG) - D1-14 (CANL)Ignition Switch OFF1 kohms or more
Page 1241 of 4500
NG-B: CHECK CAN BUS LINE FOR SHORT TO GND (W/ LEXUS NAVIGATION SYSTEM)
OK: HOW TO PROCEED WITH TROUBLESHOOTING
MODE DESCRIPTION
Fig. 36: Problem Symptom Diagnostic Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM
Page 1277 of 4500
Fig. 73: Wiring Diagram - Can Main Bus Line For Disconnection (W/ LEXUS Navigation System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.CHECK DLC3
Page 1286 of 4500
Fig. 80: Wiring Diagram - CAN Main Bus Line For Disconnection (W/O Lexus Navigation System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.CHECK DLC3
Page 1292 of 4500
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 (DLC3 SUB BUS LINE)
Page 1333 of 4500
Fig. 124: Wiring Diagram - CAN Bus Lines For Short Circuit (W/O LEXUS Navigation System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.CHECK CAN BUS LINES FOR SHORT CIRCUIT (DLC3 SUB BUS LINE)
Page 1363 of 4500
Fig. 153: Wiring Diagram - CAN Bus Line For Short To +B (W/ LEXUS Navigation System) (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Page 1364 of 4500
Fig. 154: Wiring Diagram - CAN Bus Line For Short To +B (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 +B (DLC3 SUB BUS LINE)
