Can Communication System Check Can Bus Line (Rhd Models)

Communication System. Lexus Gs430, Gs300. Uzs190 Grs190
Can Communication. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN BUS LINE (MAIN BUS LINE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT)

CHECK CAN BUS LINE FOR SHORT TO +B

CHECK CAN BUS LINE FOR SHORT TO GND

CAN COMMUNICATION SYSTEM - Check CAN Bus Line (RHD Models)


DESCRIPTION

When any DTC for the CAN communication system is output, first measure the resistance between the terminals of the DLC3 to specify the trouble area, and check that there is no short in the CAN main bus line, between the CAN bus lines, to +B, or to GND.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line (Rhd Models)


Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line (Rhd Models)


Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line (Rhd Models)


INSPECTION PROCEDURE

1.CHECK CAN BUS LINE (MAIN BUS LINE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT)

  1. Turn the engine switch off.



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line (Rhd Models)

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    		Result
    L16-6 (CANH) - L16-14 (CANL)
    		Engine switch off
    		54 to 69 Ω
    		OK
    L16-6 (CANH) - L16-14 (CANL)
    		Engine switch off
    		69 Ω or more
    		NG-A
    L16-6 (CANH) - L16-14 (CANL)
    		Engine switch off
    		54 Ω or less
    		NG-B


NG-A
CHECK CAN MAIN BUS LINE FOR DISCONNECTION

NG-B
CHECK CAN BUS LINES FOR SHORT CIRCUIT
OK


2.CHECK CAN BUS LINE FOR SHORT TO +B


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line (Rhd Models)

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    L16-6 (CANH) - L16-16 (BAT)
    		Engine switch off
    		1 MΩ or more
    L16-14 (CANL) - L16-16 (BAT)
    		Engine switch off
    		1 MΩ or more


NG
CHECK CAN BUS LINE FOR SHORT TO +B
OK


3.CHECK CAN BUS LINE FOR SHORT TO GND


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line (Rhd Models)

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    L16-6 (CANH) - L16-4 (CG)
    		Engine switch off
    		1 MΩ or more
    L16-14 (CANL) - L16-4 (CG)
    		Engine switch off
    		1 MΩ or more


NG
CHECK CAN BUS LINE FOR SHORT TO GND
OK

HOW TO PROCEED WITH TROUBLESHOOTING