2Ad-Fhv Can Communication System (For Rhd) Can Bus Line

Communication System. Lexus Is250, Is220D. Gse20 Ale20
Can Communication. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK CAN BUS LINE (SHORT TO B+ IN CAN BUS LINE)

CHECK CAN BUS LINE (SHORT TO GND IN CAN BUS LINE)

2AD-FHV CAN COMMUNICATION SYSTEM (for RHD) - CAN Bus Line


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. Then 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 Is250, Is220D. Gse20 Ale20.Can Communication.Can Communication System (For Lhd).2Ad-Fhv Can Communication System (For Rhd) Can Bus Line


INSPECTION PROCEDURE

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


    Lexus Is250, Is220D. Gse20 Ale20.Can Communication.Can Communication System (For Lhd).2Ad-Fhv Can Communication System (For Rhd) Can Bus Line

  1. Turn the engine switch off.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    J21-6 (CANH) - J21-14 (CANL)
    		Engine switch off
    		54 to 69 Ω
    Result:
    Result
    		Proceed to
    		See Procedure
    OK
    		A
    		-
    69 Ω or higher
    		B
    		Click here
    Below 54 Ω
    		C
    		Click here


B
OPEN IN CAN MAIN BUS LINE

C
SHORT IN CAN BUS LINES
A


2.CHECK CAN BUS LINE (SHORT TO B+ IN CAN BUS LINE)


    Lexus Is250, Is220D. Gse20 Ale20.Can Communication.Can Communication System (For Lhd).2Ad-Fhv Can Communication System (For Rhd) Can Bus Line

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    J21-6 (CANH) - J21-16 (BAT)
    		Engine switch off
    		1 MΩ or higher
    J21-14 (CANL) - J21-16 (BAT)
    		Engine switch off
    		1 MΩ or higher
    Result:
    Result
    		See Procedure
    OK
    		Go to step 3
    NG
    		Click here


NG
SHORT TO B+ IN CAN BUS LINE
OK


3.CHECK CAN BUS LINE (SHORT TO GND IN CAN BUS LINE)


    Lexus Is250, Is220D. Gse20 Ale20.Can Communication.Can Communication System (For Lhd).2Ad-Fhv Can Communication System (For Rhd) Can Bus Line

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    J21-4 (CG) - J21-6 (CANH)
    		Engine switch off
    		1 kΩ or higher
    J21-4 (CG) - J21-14 (CANL)
    		Engine switch off
    		1 kΩ or higher
    Result:
    Result
    		See Procedure
    OK
    		Click here
    NG
    		Click here


NG
SHORT TO GND IN CAN BUS LINE
OK

GO TO "HOW TO PROCEED WITH TROUBLESHOOTING"