CAN COMMUNICATION SYSTEM 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 Click here.

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

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

  • 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, 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


  • 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. CAN NO. 1 JUNCTION CONNECTOR


    1. Check the CAN No. 1 junction 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

        A01HQM8E01
        Text in Illustration
        *a

        Component with harness connected

        (CAN No. 1 Junction Connector)

        		 *b

        to Main Body ECU (Multiplex Network Body ECU)

        (for V bus)
        *c

        to Steering Sensor

        (for V bus)

        		 *d

        to Airbag Sensor Assembly

        (for V bus)
        *e to DLC3 *f

        • to Power Steering ECU with Motor Assembly*1

        • to Power Steering ECU Assembly*2*3

        (for V bus)
        *g

        to Combination Meter Assembly

        (for V bus)

        		 *h

        to CAN No. 2 Junction Connector

        (for V bus)

        • *1: for 2AR w/ Wireless door lock system

        • *2: for 2AR w/o Wireless door lock system

        • *3: for 2GR-FE

      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 (Applicable Bus)
        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
        I103-1 (CANH) Y

        Airbag sensor assembly

        (for V bus)
        I103-2 (CANL) W
        I96-1 (CANH) L DLC3
        I96-2 (CANL) W
        I100-1 (CANH) G

        • Power steering ECU with motor assembly*1

        • Power steering ECU assembly*2*3

        (for V bus)
        I100-2 (CANL) W
        I94-1 (CANH) R

        Combination meter assembly

        (for V bus)
        I94-2 (CANL) W
        I93-1 (CANH) B

        CAN No. 2 junction connector

        (for V bus)
        I93-2 (CANL) W

        • *1: for 2AR w/ Wireless door lock system

        • *2: for 2AR w/o Wireless door lock system

        • *3: for 2GR-FE

  2. CAN NO. 2 JUNCTION CONNECTOR


    1. Check the CAN No. 2 junction 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

        A01HPUIE01
        Text in Illustration
        *a

        Component with harness connected

        (CAN No. 2 Junction Connector)

        		 *b

        to Clearance Warning ECU Assembly*1

        (for V bus)
        *c

        to ECM

        (for V bus)

        		 *d

        to Air Conditioning Amplifier Assembly

        (for V bus)
        *e

        to Brake Actuator Assembly (Skid Control ECU)

        (for V bus)

        		 *f

        to Smart Key ECU Assembly (Certification ECU)*2

        (for V bus)
        *g

        to Network Gateway ECU*3

        (for V bus)

        		 *h

        • to Navigation ECU Sub-assembly*4*5

        • to Radio and Display Receiver Assembly*6

        (for V bus)
        *i

        to CAN No. 1 Junction Connector

        (for V bus)

        		 - -

        • *1: w/ Intuitive parking assist system

        • *2: w/ Smart key system

        • *3: w/ Blind spot monitor system

        • *4: for Navigation receiver type

        • *5: for Radio and display type w/ intuitive parking assist system

        • *6: for Radio and display type w/o intuitive parking assist system

      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
        I111-1 (CANH) BE

        Clearance warning ECU assembly*1

        (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
        I105-1 (CANH) Y

        Brake actuator assembly (Skid control ECU)

        (for V bus)
        I105-2 (CANL) W
        I106-1 (CANH) L

        Smart key ECU assembly (Certification ECU)*2

        (for V bus)
        I106-2 (CANL) W
        I108-1 (CANH) G

        Network gateway ECU*3

        (for V bus)
        I108-2 (CANL) W
        I107-1 (CANH) R

        • Navigation ECU sub-assembly*4*5

        • Radio and display receiver assembly*6

        (for V bus)
        I107-2 (CANL) W
        I101-1 (CANH) B

        CAN No. 1 junction connector

        (for V bus)
        I101-2 (CANL) W

        • *1: w/ Intuitive parking assist system

        • *2: w/ Smart key system

        • *3: w/ Blind spot monitor system

        • *4: for Navigation receiver type

        • *5: for Radio and display type w/ intuitive parking assist system

        • *6: for Radio and display type w/o intuitive parking assist system

  3. CAN NO. 3 JUNCTION CONNECTOR (w/ Blind Spot Monitor System)


    1. Check the CAN No. 3 junction connector.


      1. A01HPMPE20
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 3 Junction Connector)
        *b

        to Blind Spot Monitor Sensor RH

        (for Sub bus 2)
        *c

        to CAN No. 5 Junction Connector

        (for Sub bus 2)
        *d

        to Network Gateway ECU

        (for Sub bus 2)

        Connection diagram

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

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

        Blind spot monitor sensor RH

        (for Sub bus 2)
        O30-20 (CANL) B
        O30-10 (CANH) G

        CAN No. 5 junction connector

        (for Sub bus 2)
        O30-21 (CANL) B
        O30-11 (CANH) V

        Network gateway ECU

        (for Sub bus 2)
        O30-22 (CANL) B

  4. CAN NO. 5 JUNCTION CONNECTOR (w/ Blind Spot Monitor System)


    1. Check the CAN No. 5 junction connector.


      1. A01HN84E23
        Text in Illustration
        *a

        Rear view of wire harness connector

        (to CAN No. 5 junction connector)
        *b

        to CAN No. 3 Junction Connector

        (for Sub bus 2)

        Connection diagram

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

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

        CAN No. 3 junction connector

        (for Sub bus 2)
        T16-2 (CANL) B

  5. DLC3


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

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

      A01HODVE20
      Text in Illustration
      *1 DLC3 - -

  6. ECM (for 2GR-FE)

    A01HQ5QE32
    Text in Illustration
    *a

    Component without harness connected

    (ECM)

    		 - -

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

    2. Disconnect the ECM connectors.

      A01HPLRE09
      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. ECM (for 2AR-FE)

      A01HQ5QE32
      5. Text in Illustration
      *a

      Component without harness connected

      (ECM)

      		 - -

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

    2. Disconnect the ECM connectors.

      A01HPLRE10
      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

      A01HOVYE07
      5. Text in Illustration
      *a

      Component without harness connected

      (Combination Meter Assembly)

      		 - -

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

  2. A01HN78E21
    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. MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    A01HQRPE56
    5. Text in Illustration
    *a

    Component without harness connected

    (Main Body ECU (Multiplex Network Body ECU)

    		 - -

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

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

    A01HOOTE04
    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 ACTUATOR ASSEMBLY (SKID CONTROL ECU)

    A01HMU3E01
    5. Text in Illustration
    *a

    Component without harness connected

    (Brake Actuator Assembly (Skid Control ECU))

    		 - -

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

    2. A01HP27E28
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Brake Actuator Assembly (Skid Control ECU))

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

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

    4. STEERING SENSOR

      A01HMLIE67
      5. Text in Illustration
      *a

      Front view of wire harness connector

      (to Steering Sensor)

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

      2. Disconnect the steering sensor connector.

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

      4. POWER STEERING ECU ASSEMBLY (for 2AR w/o Wireless Door Lock)

        A01HOPJE09
        5. Text in Illustration
        *a

        Component without harness connected

        (Power Steering ECU Assembly)

        		 - -

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

        2. Disconnect the power steering ECU assembly connectors.

          A01HOO2E06
          Text in Illustration
          *a

          Front view of wire harness connector

          (to Power Steering ECU Assembly)

          		 - -

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

        4. POWER STEERING ECU WITH MOTOR ASSEMBLY (for 2AR w/ Wireless Door Lock)

          A01HMO8E03
          5. Text in Illustration
          *a

          Component without harness connected

          (Power Steering ECU with Motor Assembly)

          		 - -

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

          2. Disconnect the power steering ECU with motor assembly connectors.

            A01HOO2E06
            Text in Illustration
            *a

            Front view of wire harness connector

            (to Power Steering ECU with Motor Assembly)

            		 - -

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

          4. POWER STEERING ECU ASSEMBLY (for 2GR-FE)

            A01HMSGE05
            5. Text in Illustration
            *a

            Component without harness connected

            (Power Steering ECU Assembly)

            		 - -

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

            2. Disconnect the power steering ECU assembly connectors.

              A01HMRFE04
              Text in Illustration
              *a

              Front view of wire harness connector

              (to Power Steering ECU Assembly)

              		 - -

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

            4. AIRBAG SENSOR ASSEMBLY

              A01HMZUE22
              5. Text in Illustration
              *1 DLC3 - -
              *a

              Front view of wire harness connector

              (to Airbag Sensor Assembly)

              		 - -

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

              2. Disconnect the airbag sensor assembly connector.

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

              4. SMART KEY ECU ASSEMBLY (CERTIFICATION ECU) (w/ Smart Key System)

                A01HNEKE31
                5. Text in Illustration
                *a

                Component without harness connected

                (Smart Key ECU Assembly (Certification ECU))

                		 - -

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

                2. Disconnect the smart key ECU assembly connector.

                  A01HOV0E05
                  Text in Illustration
                  *a

                  Rear 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)

                  A01HMH8E01
                  5. Text in Illustration
                  *A for 6 Speakers *B for 10 Speakers
                  *C w/ Navigation System - -
                  *a

                  Component without harness connected

                  (Radio and Display Receiver Assembly (for Radio and Display Type w/o Intuitive Parking Assist System))

                  		 - -

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

                  2. Disconnect the radio and display receiver assembly connectors.

                    A01HQLOE01
                    Text in Illustration
                    *A for 6 Speakers *B for 10 Speakers
                    *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.


                    • *1: for 6 speakers

                    • *2: for 10 speakers

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

                    A01HQWHE13
                    5. Text in Illustration
                    *a

                    Component without harness connected

                    (Navigation ECU Sub-assembly (for Radio and Display Type w/ Intuitive Parking Assist System))

                    		 - -

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

                    2. Disconnect the navigation ECU sub-assembly connectors.

                      A01HN3RE15
                      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 ECU SUB-ASSEMBLY (for Navigation Receiver Type)

                      A01HQWHE13
                      5. Text in Illustration
                      *a

                      Component without harness connected

                      (Navigation ECU Sub-assembly (for Navigation Receiver Type))

                      		 - -

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

                      2. Disconnect the navigation ECU sub-assembly connectors.

                        A01HN3RE15
                        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. AIR CONDITIONING AMPLIFIER ASSEMBLY (for Automatic Air Conditioning System)

                        A01HP7IE12
                        5. Text in Illustration
                        *a

                        Component without harness connected

                        (Air Conditioning Amplifier Assembly (for Automatic Air Conditioning System))

                        		 - -

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

                        2. Disconnect the air conditioning amplifier assembly connector.

                          A01HNTDE36
                          Text in Illustration
                          *a

                          Front view of wire harness connector

                          (to Air Conditioning Amplifier Assembly)

                          		 - -

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

                        4. AIR CONDITIONING AMPLIFIER ASSEMBLY (for Manual Air Conditioning System)

                          A01HP7IE12
                          5. Text in Illustration
                          *a

                          Component without harness connected

                          (Air Conditioning Amplifier Assembly (for Manual Air Conditioning System))

                          		 - -

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

                          2. Disconnect the air conditioning amplifier assembly connector.

                            A01HNTDE36
                            Text in Illustration
                            *a

                            Front view of wire harness connector

                            (to Air Conditioning Amplifier Assembly)

                            		 - -

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

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

                            A01HOY0E04
                            5. Text in Illustration
                            *1 DLC3 - -
                            *a

                            Front view of wire harness connector

                            (to Clearance Warning ECU Assembly)

                            		 - -

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

                            2. Disconnect the clearance warning ECU assembly connector.

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

                            4. NETWORK GATEWAY ECU (w/ Blind Spot Monitor System)

                              A01HPWNE03
                              5. Text in Illustration
                              *a

                              Component without harness connected

                              (Network Gateway ECU (w/ Blind Spot Monitor System))

                              		 - -

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

                              2. A01HMLOE27
                                Text in Illustration
                                *a

                                Front view of wire harness connector

                                (to Network Gateway ECU)

                                Disconnect the network gateway ECU connector.

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

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

                                A01HN8QE24
                                5. Text in Illustration
                                *a

                                Component without harness connected

                                (Blind Spot Monitor Sensor RH)

                                		 - -

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

                                2. Disconnect the blind spot monitor sensor RH connector.

                                  A01HNW4E09
                                  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.