Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN BUS LINE FOR SHORT TO GND (DLC3 SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (CAN BUSES P-CAN J/C)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (DISTANCE CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (STEERING SENSOR SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (SEAT BELT CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU WITH ACTUATOR SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (ECM SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (YAW RATE SENSOR SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (CAN MAIN BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (DISTANCE CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (STEERING SENSOR SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (SEAT BELT CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU WITH ACTUATOR SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (ECM SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (YAW RATE SENSOR SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (STEERING CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (ABSORBER CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (CLEARANCE WARNING ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (TELEVISION CAMERA ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (NETWORK GATEWAY ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (STEERING CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (ABSORBER CONTROL ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (CLEARANCE WARNING ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (TELEVISION CAMERA ECU SUB BUS LINE)

CONNECT CONNECTOR

CHECK CAN BUS LINE FOR SHORT TO GND (NETWORK GATEWAY ECU SUB BUS LINE)

CAN COMMUNICATION SYSTEM - Check CAN Bus Line for Short to GND (LHD Models)


DESCRIPTION

There may be a short circuit between the CAN bus line and GND when there is resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3.

Symptoms
Trouble Area
There is resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3
  1. Short to GND
  2. Distance control ECU
  3. Steering 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. Yawrate 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


Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)


Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)


INSPECTION PROCEDURE

1.CHECK CAN BUS LINE FOR SHORT TO GND (DLC3 SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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
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 LINE FOR SHORT TO GND (CAN BUSES P-CAN J/C)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (DISTANCE CONTROL ECU SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (STEERING SENSOR SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (SEAT BELT CONTROL ECU SUB BUS LINE)
HINT:
For vehicle without dynamic radar cruse control, go to step 11.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (SKID CONTROL ECU WITH ACTUATOR SUB BUS LINE)
HINT:
Vehicle except for engine model 3GR-FE and 3GR-FSE go to step 13.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (SKID CONTROL ECU SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (ECM SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (YAW RATE SENSOR SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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
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 LINE FOR SHORT TO GND (CAN MAIN BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  1. Disconnect the CAN main bus line connector (L4) 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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


OK
REPLACE CAN BUS 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 LINE FOR SHORT TO GND (DISTANCE CONTROL ECU SUB BUS LINE)

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



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (STEERING SENSOR SUB BUS LINE)

  1. Disconnect the steering sensor connector (L19).



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (SEAT BELT CONTROL ECU SUB BUS LINE)

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



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (SKID CONTROL ECU WITH ACTUATOR SUB BUS LINE)

  1. Disconnect the skid control ECU with actuator connector (A15).



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 FOR SHORT TO GND (SKID CONTROL ECU SUB BUS LINE)

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



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


OK
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 LINE FOR SHORT TO GND (ECM SUB BUS LINE)

  1. Disconnect the ECM connector (A6).



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (YAW RATE SENSOR SUB BUS LINE)

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



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (STEERING CONTROL ECU SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (POWER STEERING ECU SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (ABSORBER CONTROL ECU SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (CLEARANCE WARNING ECU SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (TELEVISION CAMERA ECU SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (NETWORK GATEWAY ECU SUB BUS LINE)


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd Models)

  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.


    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (STEERING CONTROL ECU SUB BUS LINE)

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



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (POWER STEERING ECU SUB BUS LINE)

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



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (ABSORBER CONTROL ECU SUB BUS LINE)

  1. Disconnect the absorber ECU connector (L72).



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (CLEARANCE WARNING ECU SUB BUS LINE)

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



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (TELEVISION CAMERA ECU SUB BUS LINE)

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



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


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 LINE FOR SHORT TO GND (NETWORK GATEWAY ECU SUB BUS LINE)

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



    Lexus Gs430, Gs300. Uzs190 Grs190.Can Communication.Can Communication System.Can Communication System Check Can Bus Line For Short To Gnd (Lhd 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


OK
REPLACE NETWORK GATEWAY ECU
NG

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