CAN COMMUNICATION SYSTEM > Check CAN Bus Lines for Short Circuit (LHD Models)

for Preparation Click here


DESCRIPTION

There may be a short circuit between the CAN bus lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.

Symptom
Trouble Area
Resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.
  1. Short between CAN bus lines
  2. Distance control ECU
  3. Steering angle sensor
  4. Seat belt control ECU
  5. Skid control ECU with actuator (3GR-FE, 3GR-FSE)
  6. Skid control ECU (3UZ-FE)
  7. ECM
  8. Yaw rate sensor
  9. Steering control ECU
  10. Power steering ECU
  11. Absorber control ECU
  12. Clearance waRning ECU
  13. Television camera ECU
  14. Network gateway ECU
  15. Junction connector (P-CAN J/C)
  16. Junction connector (D-CAN J/C)

WIRING DIAGRAM


C113202E01


C113203E03


INSPECTION PROCEDURE

1.CHECK CAN BUS LINES FOR SHORT CIRCUIT (DLC3 SUB BUS LINE)


    G031932E29

  1. Disconnect the DLC3 sub bus line connector (L9) from the D-CAN J/C B side (w/o earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		1 MΩ or more



NG
REPAIR OR REPLACE DLC3 SUB BUS LINE OR CONNECTOR (CAN-H,CAN-L)
OK


2.CONNECT CONNECTOR

  1. Reconnect the DLC3 sub bus line connector (L9) to the D-CAN J/C B side (w/o earth terminal).


NEXT


3.CHECK CAN BUS LINES FOR SHORT CIRCUIT (CAN BUSES TO P-CAN J/C)


    C107168E02

  1. Disconnect the CAN main bus line connector (L78) from the P-CAN J/C B side (w/o earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		108 to 132 Ω



OK
Go to step 34
NG


4.CONNECT CONNECTOR

  1. Reconnect the CAN main bus line connector (L78) to the P-CAN J/C B side (w/o earth terminal).


NEXT


5.CHECK CAN BUS LINES FOR SHORT CIRCUIT (DISTANCE CONTROL ECU)

NOTICE:
For vehicle without dynamic radar cruise control, go to step 7.



    G031932E30

  1. Disconnect the distance control ECU sub bus line connector (L7) from the D-CAN J/C B side (w/o earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 20
NG


6.CONNECT CONNECTOR

  1. Reconnect the distance control ECU sub bus line connector (L7) to the D-CAN J/C B side (w/o earth terminal).


NEXT


7.CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING SENSOR)


    G031932E31

  1. Disconnect the steering sensor sub bus line connector (L6) from the D-CAN J/C B side (w/o earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 22
NG


8.CONNECT CONNECTOR

  1. Reconnect the steering sensor sub bus line connector (L6) to the D-CAN J/C B side (w/o earth terminal).


NEXT


9.CHECK CAN BUS LINES FOR SHORT CIRCUIT (SEAT BELT CONTROL ECU)

NOTICE:
For vehicle without dynamic laser cruse control, go to step 11.



    G031932E32

  1. Disconnect the seat belt control ECU sub bus line connector (L8) from the D-CAN J/C B side (w/o earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 24
NG


10.CONNECT CONNECTOR

  1. Reconnect the seat belt control ECU sub bus line connector (L8) to the D-CAN J/C B side (w/o earth terminal).


NEXT


11.CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU WITH ACTUATOR)

NOTICE:
Vehicle except for engine model 3GR-FE and 3GR-FSE, go to step 13.



    G031934E22

  1. Disconnect the skid control ECU with actuator sub bus line connector (L2) from the D-CAN J/C A side (w/ earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 26
NG


12.CONNECT CONNECTOR

  1. Reconnect the skid control ECU with actuator sub bus line connector (L2) to the D-CAN J/C A side (w/ earth terminal).


NEXT


13.CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU)


    G031934E22

  1. Disconnect the skid control ECU sub bus line connector (L2) from the D-CAN J/C A side (w/ earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 28
NG


14.CONNECT CONNECTOR

  1. Reconnect the skid control ECU sub bus line connector (L2) to the D-CAN J/C A side (w/ earth terminal).


NEXT


15.CHECK CAN BUS LINES FOR SHORT CIRCUIT (ECM)


    G031934E23

  1. Disconnect the ECM sub bus line connector (L3) from the D-CAN J/C A side (w/ earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 30
NG


16.CONNECT CONNECTOR

  1. Reconnect the ECM sub bus line connector (L3) to the D-CAN J/C A side (w/ earth terminal).


NEXT


17.CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR)


    G031934E24

  1. Disconnect the yaw rate sensor sub bus line connector (L5) from the D-CAN J/C A side (w/ earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 32
NG


18.CONNECT CONNECTOR

  1. Reconnect the yaw rate sensor sub bus line connector (L5) to the D-CAN J/C A side (w/ earth terminal).


NEXT


19.CHECK CAN BUS LINES FOR SHORT (CAN MAIN BUS LINE)


    G031934E47

  1. Disconnect the CAN main bus line connector (L4) from the D-CAN J/C A side (w/ earth terminal).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPAIR OR REPLACE CAN BUS MAIN LINE
NG

REPLACE JUNCTION CONNECTOR (D-CAN J/C) 

20.CONNECT CONNECTOR

  1. Reconnect the distance control ECU sub bus line connector (L7) to the D-CAN J/C B side (w/o earth terminal).


NEXT


21.CHECK CAN BUS LINES FOR SHORT CIRCUIT (DISTANCE CONTROL ECU SUB BUS LINE)

  1. Disconnect the distance control ECU connector (L13).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE DISTANCE CONTROL ECU
NG

REPAIR OR REPLACE DISTANCE CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

22.CONNECT CONNECTOR

  1. Reconnect the steering sensor sub bus line connector (L6) to the D-CAN J/C B side (w/o earth terminal).


NEXT


23.CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING SENSOR SUB BUS LINE)

  1. Disconnect the steering sensor connector (L19).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE STEERING SENSOR
NG

REPAIR OR REPLACE STEERING SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

24.CONNECT CONNECTOR

  1. Reconnect the seat belt control ECU sub bus line connector (L8) to the D-CAN J/C B side (w/o earth terminal).


NEXT


25.CHECK CAN BUS LINES FOR SHORT CIRCUIT (SEAT BELT CONTROL ECU SUB BUS LINE)

  1. Disconnect the seat belt control ECU connector (W30).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE SEAT BELT CONTROL ECU
NG

REPAIR OR REPLACE SEAT BELT CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

26.CONNECT CONNECTOR

  1. Reconnect the skid control ECU with actuator sub bus line connector (L2) to the D-CAN J/C A side (w/ earth terminal).


NEXT


27.CHECK CAN BUS LINES FOR SHORT CIRCUIT (SKID CONTROL ECU WITH ACTUATOR SUB BUS LINE)

  1. Disconnect the skid control ECU with actuator connector (A48).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE SKID CONTROL ECU WITH ACTUATOR
NG

REPAIR OR REPLACE SKID CONTROL ECU WITH ACTUATOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

28.CONNECT CONNECTOR

  1. Reconnect the skid control ECU sub bus line connector (L2) to the D-CAN J/C A side (w/ earth terminal).


NEXT


29.CHECK CAN BUS LINE (SKID CONTRROL ECU SUB BUS LINE)

  1. Disconnect the skid control ECU connector (A48).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω




REPLACE SKID CONTROL ECU
NG

REPAIR OR REPLACE SKID CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

30.CONNECT CONNECTOR

  1. Reconnect the ECM sub bus line connector (L3) to the D-CAN J/C A side (w/ earth terminal).


NEXT


31.CHECK CAN BUS LINES FOR SHORT CIRCUIT (ECM SUB BUS LINE)

  1. Disconnect the ECM connector (A6).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE ECM
NG

REPAIR OR REPLACE ECM SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

32.CONNECT CONNECTOR

  1. Reconnect the yaw rate sensor sub bus line connector (L5) to the D-CAN J/C A side (w/ earth terminal).


NEXT


33.CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR SUB BUS LINE)

  1. Disconnect the yaw rate sensor connector (L35).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE YAW RATE SENSOR
NG

REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

34.CONNECT CONNECTOR

  1. Reconnect the CAN main bus line connector (L78) to the P-CAN J/C B side (w/o earth terminal).


NEXT


35.CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING CONTROL ECU SUB BUS LINE)


    G031932E34

  1. Disconnect the steering control ECU sub bus line connector (L79) from the P-CAN J/C B side (w/o earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 46
NG


36.CONNECT CONNECTOR

  1. Reconnect the steering control ECU sub bus line connector (L79) to the P-CAN J/C B side (w/o earth terminal).


NEXT


37.CHECK CAN BUS LINES FOR SHORT CIRCUIT (POWER STEERING ECU SUB BUS LINE)


    G031932E36

  1. Disconnect the power steering ECU sub bus line connector (L80) from the P-CAN J/C B side (w/o earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 48
NG


38.CONNECT CONNECTOR

  1. Reconnect the power steering ECU sub bus line connector (L80) to the P-CAN J/C B side (w/o earth terminal).


NEXT


39.CHECK CAN BUS LINES FOR SHORT CIRCUIT (ABSORBER CONTROL ECU SUB BUS LINE)


    G031932E35

  1. Disconnect the absorber control ECU sub bus line connector (L81) from the P-CAN J/C B side (w/o earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 50
NG


40.CONNECT CONNECTOR

  1. Reconnect the absorber control ECU sub bus line connector (L81) to the P-CAN J/C B side (w/o earth terminal).


NEXT


41.CHECK CAN BUS LINES FOR SHORT CIRCUIT (CLEARANCE WARNING ECU SUB BUS LINE)


    G031934E25

  1. Disconnect the clearance warning ECU sub bus line connector (L75) from the P-CAN J/C A side (w/ earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 52
NG


42.CONNECT CONNECTOR

  1. Reconnect the clearance warning ECU sub bus line connector (L75) to the P-CAN J/C A side (w/ earth terminal).


NEXT


43.CHECK CAN BUS LINES FOR SHORT CIRCUIT (TELEVISION CAMERA ECU SUB BUS LINE)


    G031934E26

  1. Disconnect the television camera ECU sub bus line connector (L77) from the P-CAN J/C A side (w/ earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 54
NG


44.CONNECT CONNECTOR

  1. Reconnect the television camera ECU sub bus line connector (L77) to the P-CAN J/C A side (w/ earth terminal).


NEXT


45.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NETWORK GATEWAY ECU SUB BUS LINE)


    G031934E28

  1. Disconnect the network gateway ECU sub bus line connector (L76) from the P-CAN J/C A side (w/ earth terminal).

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



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
Go to step 56
NG

REPLACE JUNCTION CONNECTOR (P-CAN J/C) 

46.CONNECT CONNECTOR

  1. Reconnect the steering control ECU sub bus line connector (L79) to the P-CAN J/C B side (w/o earth terminal).


NEXT


47.CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING CONTROL ECU SUB BUS LINE)

  1. Disconnect the steering control ECU connector (L70).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE STEERING CONTROL ECU
NG

REPAIR OR REPLACE STEERING CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

48.CONNECT CONNECTOR

  1. Reconnect the power steering ECU sub bus line connector (L80) to the P-CAN J/C B side (w/o earth terminal).


NEXT


49.CHECK CAN BUS LINES FOR SHORT CIRCUIT (POWER STEERING ECU SUB BUS LINE)

  1. Disconnect the power steering ECU connector (A24).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE POWER STEERING ECU
NG

REPAIR OR REPLACE POWER STEERING ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

50.CONNECT CONNECTOR

  1. Reconnect the absorber control ECU sub bus line connector (L81) to the P-CAN J/C B side (w/o earth terminal).


NEXT


51.CHECK CAN BUS LINES FOR SHORT CIRCUIT (ABSORBER CONTROL ECU SUB BUS LINE)

  1. Disconnect the absorber control ECU connector (L72).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE ABSORBER CONTROL ECU
NG

REPAIR OR REPLACE ABSORBER CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

52.CONNECT CONNECTOR

  1. Reconnect the clearance warning ECU sub bus line connector (L75) to the P-CAN J/C A side (w/ earth terminal).


NEXT


53.CHECK CAN BUS LINES FOR SHORT CIRCUIT (CLEARANCE WARNING ECU SUB BUS LINE)

  1. Disconnect the clearance warning ECU connector (A40).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE CLEARANCE WARNING ECU
NG

REPAIR OR REPLACE CLEARANCE WARNING ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

54.CONNECT CONNECTOR

  1. Reconnect the television camera ECU sub bus line connector (L77) to the P-CAN J/C A side (w/ earth terminal).


NEXT


55.CHECK CAN BUS LINES FOR SHORT CIRCUIT (TELEVISION CAMERA ECU SUB BUS LINE)

  1. Disconnect the television camera ECU connector (L64).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE TELEVISION CAMERA ECU
NG

REPAIR OR REPLACE TELEVISION CAMERA ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) 

56.CONNECT CONNECTOR

  1. Reconnect the network gateway ECU sub bus line connector (L76) to the P-CAN J/C A side (w/ earth terminal).


NEXT


57.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NETWORK GATEWAY ECU SUB BUS LINE)

  1. Disconnect the network gateway ECU connector (L66).



    G026206E28

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

    Standard resistance:
    Tester connection
    		Condition
    		Specified value
    L16-6 (CANH) - L16-14 (CANL)
    		Engine Switch off
    		54 to 69 Ω



OK
REPLACE NETWORK GATEWAY ECU
NG

REPAIR OR REPLACE NETWORK GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)