2Ad-Fhv Can Communication System (For Lhd) Open In Can Main Bus Line

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DLC3

CHECK FOR OPEN IN CAN MAIN BUS LINE (BUS CHECK)

CHECK FOR OPEN IN CAN MAIN BUS LINE (ECM - CAN LH J/C)

CHECK FOR OPEN IN CAN MAIN BUS LINE (GATEWAY ECU - CAN LH J/C)

RECONNECT CONNECTOR

CHECK FOR OPEN IN CAN MAIN BUS LINE (CAN RH J/C - GATEWAY ECU)

CHECK FOR OPEN IN CAN MAIN BUS LINE (ECM - CAN LH J/C)

RECONNECT CONNECTOR

CHECK FOR OPEN IN CAN MAIN BUS LINE (GATEWAY ECU - CAN LH J/C)

RECONNECT CONNECTOR

CHECK FOR OPEN IN CAN MAIN BUS LINE (CAN RH J/C - GATEWAY ECU)

RECONNECT CONNECTOR

CHECK FOR OPEN IN CAN MAIN BUS LINE (ECM - CAN LH J/C)

2AD-FHV CAN COMMUNICATION SYSTEM (for LHD) - Open in CAN Main Bus Line


DESCRIPTION

There may be an open circuit in the CAN main bus line and/or the DLC3 branch line when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or more.

Symptom
Trouble Area
Resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or more.
  1. CAN main bus line or connector
  2. CAN LH J/C
  3. CAN RH J/C
  4. DLC3 branch line or connector

WIRING DIAGRAM


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


INSPECTION PROCEDURE

1.CHECK DLC3


    Lexus Is250, Is220D. Gse20 Ale20.Can Communication.Can Communication System (For Lhd).2Ad-Fhv Can Communication System (For Lhd) Open In Can Main 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
    		Result
    J21-6 (CANH) -J21-14 (CANL)
    		Engine switch off
    		108 to 132 Ω
    		A
    J21-6 (CANH) - J21-14 (CANL)
    		Engine switch off
    		132 Ω or higher
    		B
    NOTICE:
    When the measured value is 132 Ω or higher and a CAN communication system diagnostic trouble code is output, there may be a fault besides disconnection of the DLC3 branch line. For that reason, troubleshooting should be performed again from "HOW TO PROCEED WITH TROUBLESHOOTING" (Click here ) after repairing the trouble area.


B
REPAIR OR REPLACE DLC3 BRANCH LINE OR CONNECTOR (CANH, CANL)
A


2.CHECK FOR OPEN IN CAN MAIN BUS LINE (BUS CHECK)

  1. Perform "Communication Bus Check" using the intelligent tester (Click here).

    Result:

    Specified Condition
    		Proceed to
    "ENGINE" and "ECT" only are not displayed
    		A
    "BODY/GATEWAY" only is not displayed
    		B
    Others
    		C


B
Go to step 4

C
Go to step 7
A


3.CHECK FOR OPEN IN CAN MAIN BUS LINE (ECM - CAN LH J/C)


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

  1. Turn the engine switch off.

  1. Disconnect the ECM connector (A49).

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    A49-38 (CANH) - A49-46 (CANL)
    		Engine switch off
    		108 to 132 Ω


NG
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - CAN LH J/C)
OK

REPLACE ECM

4.CHECK FOR OPEN IN CAN MAIN BUS LINE (GATEWAY ECU - CAN LH J/C)


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

  1. Turn the engine switch off.

  1. Disconnect the gateway ECU connector (J76).

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    J76-17 (CA1H) - J76-18 (CA1L)
    		Engine switch off
    		108 to 132 Ω


OK
REPLACE GATEWAY ECU
NG


5.RECONNECT CONNECTOR

  1. Reconnect the gateway ECU connector (J76).


NEXT


6.CHECK FOR OPEN IN CAN MAIN BUS LINE (CAN RH J/C - GATEWAY ECU)


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

  1. Disconnect the CAN main bus line connector (J84) from the CAN RH J/C B side (without earth terminal).

    NOTICE:
    1. Before disconnecting the connector, make a note of where it is connected.
    2. Reconnect the connector to its original position.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    J84-1 (CANH) - J84-2 (CANL)
    		Engine switch off
    		108 to 132 Ω


NG
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN RH J/C - GATEWAY ECU)
OK

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN LH J/C - CAN RH J/C)

7.CHECK FOR OPEN IN CAN MAIN BUS LINE (ECM - CAN LH J/C)


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

  1. Turn the engine switch off.

  1. Disconnect the ECM connector (A49).

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    A49-38 (CANH) - A49-46 (CANL)
    		Engine switch off
    		108 to 132 Ω


OK
REPLACE ECM
NG


8.RECONNECT CONNECTOR

  1. Reconnect the ECM connector (A49).


NEXT


9.CHECK FOR OPEN IN CAN MAIN BUS LINE (GATEWAY ECU - CAN LH J/C)


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

  1. Disconnect the gateway ECU connector (J76).

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    J76-17 (CA1H) - J76-18 (CA1L)
    		Engine switch off
    		108 to 132 Ω


OK
REPLACE GATEWAY ECU
NG


10.RECONNECT CONNECTOR

  1. Reconnect the gateway ECU connector (J76).


NEXT


11.CHECK FOR OPEN IN CAN MAIN BUS LINE (CAN RH J/C - GATEWAY ECU)


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

  1. Disconnect the CAN main bus line connector (J84) from the CAN RH J/C B side (without earth terminal).

    NOTICE:
    1. Before disconnecting the connector, make a note of where it is connected.
    2. Reconnect the connector to its original position.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    J84-1 (CANH) - J84-2 (CANL)
    		Engine switch off
    		108 to 132 Ω


NG
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN RH J/C - GATEWAY ECU)
OK


12.RECONNECT CONNECTOR

  1. Reconnect the CAN main bus line connector (J84) to the CAN RH J/C B side (without earth terminal).


NEXT


13.CHECK FOR OPEN IN CAN MAIN BUS LINE (ECM - CAN LH J/C)


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

  1. Disconnect the CAN main bus line connector (J2) from the CAN LH J/C A side (with earth terminal).

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Value
    J2-1 (CANH) - J2-2 (CANL)
    		Engine switch off
    		108 to 132 Ω


NG
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - CAN LH J/C)
OK

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN LH J/C - CAN RH J/C)