CAN COMMUNICATION SYSTEM TERMINALS OF ECU

Note


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

  • Turn the power switch off before measuring the resistances between CAN main bus lines and between CAN branch lines.

  • Turn the power switch off before inspecting CAN bus lines for a ground short.

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


  • Operating the power 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. CAN JUNCTION LH CONNECTOR


    1. Check the CAN junction LH connector.

      Tech Tips

      Connectors that connect to the CAN junction connector can be distinguished by color of their CAN bus lines. When the connectors have been disconnected from the CAN junction connector, reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


      1. Connection diagram

        A01HV6PE01
        Text in Illustration
        *a

        Component with harness connected

        (CAN Junction LH Connector)

        *b

        to Main Body ECU (Multiplex Network Body ECU)

        (for V Bus)

        *c

        to Steering Sensor

        (for V Bus)

        *d

        to Power Management Control ECU

        (for V Bus)

        *e

        to DLC3

        (for V Bus)

        *f

        to Brake Booster with Master Cylinder Assembly (Skid Control ECU)

        (for V Bus)

        *g

        to Combination Meter Assembly

        (for V Bus)

        *h

        to CAN Junction RH Connector

        (for V Bus)

      2. Check the connection diagram of the components which are connected to the CAN junction LH connector.

        Terminal No. (Symbol) Wiring Color Connected to
        I95-1 (CANH) P

        Main body ECU (Multiplex network body ECU)

        (for V bus)

        I95-2 (CANL) W
        I97-1 (CANH) V

        Steering sensor

        (for V bus)

        I97-2 (CANL) W
        I109-1 (CANH) G

        Power management control ECU

        (for V bus)

        I109-2 (CANL) W
        I96-1 (CANH) L

        DLC3

        (for V bus)

        I96-2 (CANL) W
        I110-1 (CANH) Y

        Brake booster with master cylinder assembly (Skid control ECU)

        (for V bus)

        I110-2 (CANL) W
        I94-1 (CANH) R

        Combination meter assembly

        (for V bus)

        I94-2 (CANL) W
        I93-1 (CANH) B

        CAN junction RH connector

        (for V bus)

        I93-2 (CANL) W
  2. CAN JUNCTION RH CONNECTOR


    1. Check the CAN junction RH connector.

      Tech Tips

      Connectors that connect to the CAN junction connector can be distinguished by color of their CAN bus lines. When the connectors have been disconnected from the CAN junction connector, reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


      1. Connection diagram

        A01HV5IE06
        Text in Illustration
        *a

        Component with harness connected

        (CAN Junction RH Connector)

        *b

        to Clearance Warning ECU Assembly*4

        (for V Bus)

        *c

        to ECM

        (for V Bus)

        *d

        to Air Conditioning Amplifier Assembly

        (for V Bus)

        *e

        to Airbag Sensor Assembly

        (for V Bus)

        *f

        to Smart Key ECU Assembly (Certification ECU)

        (for V Bus)

        *g

        to Power Steering ECU Assembly

        (for V Bus)

        *h
        • to Navigation Receiver Assembly*1

        • to Navigation ECU Sub-assembly*2

        • to Radio and Display Receiver Assembly*3

        (for V Bus)

        *i

        to CAN Junction LH Connector

        (for V Bus)

        - -

        • *1: for Navigation receiver type

        • *2: for Radio and display type (w/ Intuitive parking assist system)

        • *3: for Radio and display type (w/o Intuitive parking assist system)

        • *4: w/ Intuitive parking assist system

      2. Check the connection diagram of the components which are connected to the CAN junction RH connector.

        Terminal No. (Symbol) Wiring Color Connected to
        I111-1 (CANH) BE

        Clearance warning ECU assembly*4

        (for V bus)

        I111-2 (CANL) W
        I104-1 (CANH) P

        ECM

        (for V bus)

        I104-2 (CANL) W
        I102-1 (CANH) V

        Air conditioning amplifier assembly

        (for V bus)

        I102-2 (CANL) W
        I103-1 (CANH) Y

        Airbag sensor assembly

        (for V bus)

        I103-2 (CANL) W
        I106-1 (CANH) L

        Smart key ECU assembly (Certification ECU)

        (for V bus)

        I106-2 (CANL) W
        I100-1 (CANH) G

        Power steering ECU assembly

        (for V bus)

        I100-2 (CANL) W
        I107-1 (CANH) R
        • Navigation receiver assembly*1

        • Navigation ECU sub-assembly*2

        • Radio and display receiver assembly*3

        (for V bus)

        I107-2 (CANL) W
        I101-1 (CANH) B

        CAN junction LH connector

        (for V bus)

        I101-2 (CANL) W

        • *1: for Navigation receiver type

        • *2: for Radio and display type (w/ Intuitive parking assist system)

        • *3: for Radio and display type (w/o Intuitive parking assist system)

        • *4: w/ Intuitive parking assist system

  3. CAN NO. 1 JUNCTION CONNECTOR


    1. Check the CAN No. 1 junction connector.


      1. Connection diagram

        A01HTI7E34
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 1 Junction Connector)

        *b

        to Brake Booster with Master Cylinder Assembly (Skid Control ECU)

        (for Sub Bus 15)

        *c

        to ECM

        (for Sub Bus 15)

        *d

        to Power Management Control ECU

        (for Sub Bus 15)

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

        Terminal No. (Symbol) Wiring Color Connected to
        A72-1 (CANH) B

        Brake booster with master cylinder assembly (Skid control ECU)

        (for Sub bus 15)

        A72-7 (CANL) W
        A72-2 (CANH) B

        ECM

        (for Sub bus 15)

        A72-8 (CANL) W
        A72-3 (CANH) B

        Power management control ECU

        (for Sub bus 15)

        A72-9 (CANL) W
  4. CAN NO. 2 JUNCTION CONNECTOR (w/ Blind Spot Monitor System)


    1. Check the CAN No. 2 junction connector.


      1. A01HSUFE27
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 2 Junction Connector)

        *b

        to Blind Spot Monitor Sensor RH

        (for Sub Bus 11)

        *c

        to CAN No. 4 Junction Connector

        (for Sub Bus 11)

        *d

        to Power Management Control ECU

        (for Sub Bus 11)

        Connection diagram

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

        Terminal No. (Symbol) Wiring Color Connected to
        O30-9 (CANH) R

        Blind spot monitor sensor RH

        (for Sub bus 11)

        O30-20 (CANL) B
        O30-10 (CANH) G

        CAN No. 4 junction connector

        (for Sub bus 11)

        O30-21 (CANL) B
        O30-11 (CANH) V

        Power management control ECU

        (for Sub bus 11)

        O30-22 (CANL) B
  5. CAN NO. 4 JUNCTION CONNECTOR (w/ Blind Spot Monitor System)


    1. Check the CAN No. 4 junction connector.


      1. A01HSNEE27
        Text in Illustration
        *a

        Rear view of wire harness connector

        (to CAN No. 4 Junction Connector)

        *b

        to CAN No. 2 Junction Connector

        (for Sub Bus 11)

        Connection diagram

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

        Terminal No. (Symbol) Wiring Color Connected to
        T16-3 (CANH) G

        CAN No. 2 junction connector

        (for Sub bus 11)

        T16-2 (CANL) B
  6. DLC3


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

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

      A01HSTKE16
      Text in Illustration
      *1 DLC3 - -
    3. POWER MANAGEMENT CONTROL ECU

      A01HTI5E97
    4. Text in Illustration
      *a

      Component without harness connected

      (Power Management Control ECU)

      - -

      1. Sub Bus 11 Main Lines


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

        2. A01HW1BE53
          Text in Illustration
          *a

          Rear view of wire harness connector

          (to Power Management Control ECU)

          Disconnect the power management control ECU connectors.

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

        4. V Bus Branch Lines and Sub Bus 15 Main Lines


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

          2. A01HTCQE36
        5. Text in Illustration
          *a

          Rear view of wire harness connector

          (to Power Management Control ECU)

Disconnect the power management control ECU connectors.

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

  • ECM

    A01HVE4E03
  • Text in Illustration
    *a

    Component without harness connected

    (ECM)

    - -

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

    2. Disconnect the ECM connectors.

      A01HSAUE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

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

    4. COMBINATION METER ASSEMBLY

      A01HST6E05
    5. Text in Illustration
      *a

      Component without harness connected

      (Combination Meter Assembly)

      - -

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

      2. A01HU9CE18
        Text in Illustration
        *a

        Front view of wire harness connector

        (to Combination Meter Assembly)

        Disconnect the combination meter assembly connector.

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

      4. INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

        A01HU6CE35
      5. Text in Illustration
        *a

        Component without harness connected

        (Instrument Panel Junction Block Assembly and Main Body ECU (Multiplex Network Body ECU))

        - -

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

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

          A01HSCJE01
          Text in Illustration
          *1 DLC3 - -
          *a

          Front view of wire harness connector

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

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

        4. BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU)

          A01HTUFE16
        5. Text in Illustration
          *a

          Component without harness connected

          (Brake Booster with Master Cylinder Assembly (Skid Control ECU))

          - -

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

          2. A01HUR5E10
            Text in Illustration
            *a

            Front view of wire harness connector

            (Brake Booster with Master Cylinder Assembly (Skid Control ECU))

            Disconnect the brake booster with master cylinder assembly (skid control ECU) connector.

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

          4. STEERING SENSOR


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

            2. A01HSB3E71
          5. Text in Illustration
            *a

            Front view of wire harness connector

            (to Steering Sensor)

            Disconnect the steering sensor connector.

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

          7. POWER STEERING ECU ASSEMBLY


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

            2. Disconnect the power steering ECU assembly connectors.

              A01HV7IE02
          8. Text in Illustration
            *a

            Component without harness connected

            (Power Steering ECU Assembly)

            - -
            A01HVINE01
            Text in Illustration
            *a

            Front view of wire harness connector

            (to Power Steering ECU Assembly)

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

          10. AIRBAG SENSOR ASSEMBLY


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

            2. Disconnect the airbag sensor assembly connector.

              A01HVTUE20
          11. Text in Illustration
            *1 DLC3 - -
            *a

            Front view of wire harness connector

            (to Airbag Sensor Assembly)

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

          13. SMART KEY ECU ASSEMBLY (CERTIFICATION ECU)

            A01HV7OE01
          14. Text in Illustration
            *a

            Component without harness connected

            (Smart Key ECU Assembly (Certification ECU))

            - -

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

            2. Disconnect the smart key ECU assembly (certification ECU) connector.

              A01HW9HE01
              Text in Illustration
              *a

              Front view of wire harness connector

              (to Smart Key ECU Assembly (Certification ECU))

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

            4. RADIO AND DISPLAY RECEIVER ASSEMBLY (for Radio and Display Type w/o Intuitive Parking Assist System)

              A01HUS3E03
            5. Text in Illustration
              *a

              Component without harness connected

              (Radio and Display Receiver Assembly)

              - -

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

              2. Disconnect the radio and display receiver assembly connectors.

                A01HSFHE02
                Text in Illustration
                *a

                Front view of wire harness connector

                (to Radio and Display Receiver Assembly)

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

              4. NAVIGATION ECU SUB-ASSEMBLY (for Radio and Display Type w/ Intuitive Parking Assist System)

                A01HVA1E13
              5. Text in Illustration
                *a

                Component without harness connected

                (Navigation ECU Sub-assembly)

                - -

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

                2. Disconnect the navigation ECU sub-assembly connectors.

                  A01HTDCE15
                  Text in Illustration
                  *a

                  Front view of wire harness connector

                  (to Navigation ECU Sub-assembly)

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

                4. NAVIGATION RECEIVER ASSEMBLY (for Navigation Receiver Type)

                  A01HUJ6E03
                5. Text in Illustration
                  *a

                  Component without harness connected

                  (Navigation Receiver Assembly)

                  - -

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

                  2. Disconnect the navigation receiver assembly connectors.

                    A01HTDCE50
                    Text in Illustration
                    *a

                    Front view of wire harness connector

                    (to Navigation Receiver Assembly)

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

                  4. AIR CONDITIONING AMPLIFIER ASSEMBLY


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

                    2. Disconnect the air conditioning amplifier assembly connector.

                      A01HSYXE07
                  5. Text in Illustration
                    *a

                    Component without harness connected

                    (Air Conditioning Amplifier Assembly)

                    - -
                    A01HSSDE31
                    Text in Illustration
                    *a

                    Front view of wire harness connector

                    (to Air Conditioning Amplifier Assembly)

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

                  7. CLEARANCE WARNING ECU ASSEMBLY (w/ Intuitive Parking Assist System)


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

                    2. Disconnect the clearance warning ECU assembly connector.

                      A01HV1DE03
                  8. Text in Illustration
                    *1 DLC3 - -
                    *a

                    Front view of wire harness connector

                    (to Clearance Warning ECU Assembly)

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

                  10. BLIND SPOT MONITOR SENSOR RH (w/ Blind Spot Monitor System)

                    A01HTSOE23
                  11. Text in Illustration
                    *a

                    Component without harness connected

                    (Blind Spot Monitor Sensor RH)

                    - -

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

                    2. Disconnect the blind spot monitor sensor RH connector.

                      A01HTZEE08
                      Text in Illustration
                      *1 DLC3 - -
                      *a

                      Front view of wire harness connector

                      (to Blind Spot Monitor Sensor RH)

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