CAN COMMUNICATION SYSTEM(w/o Central Gateway ECU) TERMINALS OF ECU

Note


  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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  • Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • This section describes the standard values for all CAN related components.

Tech Tips


  • The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.

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  • Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.


  1. NO. 1 CAN JUNCTION CONNECTOR


    1. Check the No. 1 CAN junction connector.


      1. Connection diagram

        B001CM0C01
        *a

        Front view of wire harness connector

        (to No. 1 CAN Junction Connector)

        		 *b

        • for No. 5 CAN Junction Connector (for LHD)

        • for No. 4 CAN Junction Connector (for RHD)
        *c

        • for ECM (for LHD)

        • for Combination Meter Assembly (for RHD)

        		 *d for Brake Actuator Assembly (Skid Control ECU)

      2. Check the connection diagram of the components which are connected to the No. 1 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        A119-9 (CANH) R*1, B*2

        • No. 5 CAN junction connector*1

        • No. 4 CAN junction connector*2
        A119-20 (CANL) W
        A119-10 (CANH) LG

        • ECM*1

        • Combination meter assembly*2
        A119-21 (CANL) W
        A119-11 (CANH) B*1, R*2 Brake actuator assembly (skid control ECU)
        A119-22 (CANL) W

        *1: for LHD

        *2: for RHD

  2. NO. 2 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 2 CAN junction connector.


      1. Connection diagram

        B001FLCC01
        *a

        Front view of wire harness connector

        (to No. 2 CAN Junction Connector)

        		 *b for No. 5 CAN Junction Connector
        *c for Airbag Sensor Assembly *d for No. 3 CAN Junction Connector

      2. Check the connection diagram of the components which are connected to the No. 2 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        G293-1 (CANH) GR No. 5 CAN junction connector
        G293-12 (CANL) W
        G293-5 (CANH) Y Airbag sensor assembly
        G293-16 (CANL) W
        G293-6 (CANH) LG No. 3 CAN junction connector
        G293-17 (CANL) W

  3. NO. 3 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 3 CAN junction connector.


      1. Connection diagram

        B001FTLC01
        *a

        Front view of wire harness connector

        (to No. 3 CAN Junction Connector)

        		 *b for No. 2 CAN Junction Connector
        *c for Combination Meter Assembly *d for Main Body ECU (Multiplex Network Body ECU)
        *e for DLC3 - -

      2. Check the connection diagram of the components which are connected to the No. 3 CAN junction connector.

        Terminal No. Wiring Color Connected to
        G294-1 (CANH) LG No. 2 CAN junction connector
        G294-12 (CANL) W
        G294-2 (CANH) V Combination meter assembly
        G294-13 (CANL) W
        G294-3 (CANH) L Main body ECU (multiplex network body ECU)
        G294-14 (CANL) W
        G294-5 (CANH) R DLC3
        G294-16 (CANL) W

  4. NO. 4 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 4 CAN junction connector.


      1. Connection diagram

        B001FLCC03
        *a

        Front view of wire harness connector

        (to No. 4 CAN Junction Connector)

        		 *b for No. 6 CAN Junction Connector
        *c for Main Body ECU (Multiplex Network Body ECU) *d for DLC3
        *e for Airbag Sensor Assembly *f for No. 1 CAN Junction Connector

      2. Check the connection diagram of the components which are connected to the No. 4 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        G295-1 (CANH) GR No. 6 CAN junction connector
        G295-12 (CANL) W
        G295-2 (CANH) L Main body ECU (multiplex network body ECU)
        G295-13 (CANL) W
        G295-4 (CANH) R DLC3
        G295-15 (CANL) W
        G295-5 (CANH) P Airbag sensor assembly
        G295-16 (CANL) W
        G295-8 (CANH) B No. 1 CAN junction connector
        G295-19 (CANL) W

  5. NO. 5 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 5 CAN junction connector.


      1. Connection diagram

        B001FLCC02
        *a

        Front view of wire harness connector

        (to No. 5 CAN Junction Connector)

        		 *b for No. 2 CAN Junction Connector
        *c for 4 Wheel Drive Control ECU *d for Air Conditioning Amplifier Assembly
        *e for No. 1 CAN Junction Connector - -

      2. Check the connection diagram of the components which are connected to the No. 5 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        G296-1 (CANH) GR No. 2 CAN junction connector
        G296-12 (CANL) W
        G296-2 (CANH) G 4 wheel drive control ECU
        G296-13 (CANL) W
        G296-4 (CANH) BR Air conditioning amplifier assembly
        G296-15 (CANL) W
        G296-6 (CANH) R No. 1 CAN junction connector
        G296-17 (CANL) W

  6. NO. 6 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 6 CAN junction connector.


      1. Connection diagram

        B001FLCC04
        *a

        Front view of wire harness connector

        (to No. 6 CAN Junction Connector)

        		 *b for No. 4 CAN Junction Connector
        *c for ECM *d for 4 Wheel Drive Control ECU
        *e for Air Conditioning Amplifier Assembly - -

      2. Check the connection diagram of the components which are connected to the No. 6 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        G297-1 (CANH) GR No. 4 CAN junction connector
        G297-12 (CANL) W
        G297-2 (CANH) LG ECM
        G297-13 (CANL) W
        G297-3 (CANH) G 4 wheel drive control ECU
        G297-14 (CANL) W
        G297-4 (CANH) BR Air conditioning amplifier assembly
        G297-15 (CANL) W

  7. DLC3


    1. Disconnect the cable from the negative (-) battery terminal.

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

      B001CJVC21
      *a Front view of DLC3 - -

    3. ECM

      Refer to Terminals of ECU.

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      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the ECM connector.

        B001I2HC01
      4. *a

      Front view of wire harness connector

      (to ECM)

      		 - -

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

  • BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

    Refer to Terminals of ECU.

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    1. B001FHJC02
    • *a

    Front view of wire harness connector

    (to Brake Actuator Assembly [Skid Control ECU])

    • Disconnect the brake actuator assembly (skid control ECU) connector.

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

  • AIR CONDITIONING AMPLIFIER ASSEMBLY

    Refer to Terminals of ECU.

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    1. Disconnect the cable from the negative (-) battery terminal.

    2. B001D7DC10
    • *a

    Front view of wire harness connector

    (to Air Conditioning Amplifier Assembly)

    Disconnect the air conditioning amplifier assembly connector.

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

  • AIRBAG SENSOR ASSEMBLY

    Refer to Terminals of ECU.

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    1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

    2. B001DO0C11
    • *a

    Rear view of wire harness connector

    (to Airbag Sensor Assembly)
    *b Front view of DLC3

    Disconnect the airbag sensor assembly connector.

    Note

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

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

  • COMBINATION METER ASSEMBLY

    Refer to Terminals of ECU.

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    1. Disconnect the cable from the negative (-) battery terminal.

    2. B001D7DC16
    • *a

    Front view of wire harness connector

    (to Combination Meter Assembly)

    Disconnect the combination meter assembly connector.

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

  • 4 WHEEL DRIVE CONTROL ECU

    Refer to Terminals of ECU.

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    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the 4 wheel drive control ECU connectors.

      B001H64C01
    • *a

    Front view of wire harness connector

    (to 4 Wheel Drive Control ECU)

    		 - -

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

  • MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Refer to Terminals of ECU.

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    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the main body ECU (multiplex network body ECU) connector.

      B001H8YC01
    • *a

    Front view of wire harness connector

    (to Main Body ECU [Multiplex Network Body ECU])

    		 *b Front view of DLC3

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