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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  • 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 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


  • 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 (for LHD)


    1. Check the No. 1 CAN junction connector.


      1. A01D5Q6C23
        *a

        Front view of wire harness connector

        (to No. 1 CAN Junction Connector)
        *b to No. 3 CAN Junction Connector
        *c to DLC3
        *d to Main Body ECU (Multiplex Network Body ECU)
        *e to AFS ECU (Headlight Swivel ECU Assembly)*1
        *f to Brake Actuator Assembly
        *g to ECM

        Connection diagram

        *1: w/ AFS (Adaptive Front-lighting System)

      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
        A32-1 (CANH) L No. 3 CAN junction connector
        A32-12 (CANL) W
        A32-2 (CANH) R DLC3
        A32-13 (CANL) W
        A32-3 (CANH) G Main body ECU (Multiplex network body ECU)
        A32-14 (CANL) W
        A32-4 (CANH) Y AFS ECU (Headlight swivel ECU assembly)*1
        A32-15 (CANL) W
        A32-5 (CANH) V Brake actuator assembly
        A32-16 (CANL) W
        A32-6 (CANH) B ECM
        A32-17 (CANL) W

        *1: w/ AFS (Adaptive Front-lighting System)

  2. NO. 1 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 1 CAN junction connector.


      1. A01D5Q6C24
        *a

        Front view of wire harness connector

        (to No. 1 CAN Junction Connector)
        *b to No. 3 CAN Junction Connector
        *c to Engine Stop and Start ECU*1
        *d to Main Body ECU (Multiplex Network Body ECU)
        *e to Brake Actuator Assembly
        *f to ECM

        Connection diagram

        *1: w/ Stop and Start System

      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
        A32-1 (CANH) L No. 3 CAN junction connector
        A32-12 (CANL) W
        A32-2 (CANH) P Engine stop and start ECU*1
        A32-13 (CANL) W
        A32-3 (CANH) G Main body ECU (Multiplex network body ECU)
        A32-14 (CANL) W
        A32-5 (CANH) V Brake actuator assembly
        A32-16 (CANL) W
        A32-6 (CANH) B ECM
        A32-17 (CANL) W

        *1: w/ Stop and Start System

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


    1. Check the No. 3 CAN junction connector (for Hatchback, Wagon).


      1. A01D4UZC01
        *a

        Front view of wire harness connector

        (to No. 3 CAN Junction Connector)
        *b to Airbag Sensor Assembly
        *c to Air Conditioning Amplifier Assembly*1
        *d to Radio and Display Receiver Assembly*2
        *e to Combination Meter Assembly
        *f to No. 1 CAN Junction Connector
        *g to Certification ECU (Smart Key ECU Assembly)*3
        *h to Clearance Warning ECU Assembly*4
        *i to Engine Stop and Start ECU*5
        *j to Power Steering ECU Assembly
        *k to Steering Sensor (Spiral Cable with Sensor Sub-assembly)*6
        *l to Driving Support ECU Assembly*7

        Connection diagram


        • *1: w/ Automatic Air Conditioning System

        • *2: for Radio and Display Type

        • *3: w/ Entry and Start System

        • *4: w/ Simple Intelligent Parking Assist System

        • *5: w/ Stop and Start System

        • *6: w/ VSC

        • *7: for 1ND-TV Engine with Cruise Control System

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

        Terminal No. (Symbol) Wiring Color Connected to
        E57-1 (CANH) V Airbag sensor assembly
        E57-12 (CANL) W
        E57-2 (CANH) Y Air conditioning amplifier assembly*1
        E57-13 (CANL) W
        E57-3 (CANH) G Radio and display receiver assembly*2
        E57-14 (CANL) W
        E57-4 (CANH) LG Combination meter assembly
        E57-15 (CANL) W
        E57-5 (CANH) L No. 1 CAN junction connector
        E57-16 (CANL) W
        E57-6 (CANH) R Certification ECU (Smart key ECU assembly)*3
        E57-17 (CANL) W
        E57-7 (CANH) B Clearance warning ECU assembly*4
        E57-18 (CANL) W
        E57-8 (CANH) P Engine stop and start ECU*5
        E57-19 (CANL) W
        E57-9 (CANH) GR Power steering ECU assembly
        E57-20 (CANL) W
        E57-10 (CANH) SB Steering sensor (Spiral cable with sensor sub-assembly)*6
        E57-21 (CANL) W
        E57-11 (CANH) P Driving support ECU assembly*7
        E57-22 (CANL) W

        • *1: w/ Automatic Air Conditioning System

        • *2: for Radio and Display Type

        • *3: w/ Entry and Start System

        • *4: w/ Simple Intelligent Parking Assist System

        • *5: w/ Stop and Start System

        • *6: w/ VSC

        • *7: for 1ND-TV Engine with Cruise Control System

    2. Check the No. 3 CAN junction connector (for Sedan).


      1. A01D4UZC02
        *a

        Front view of wire harness connector

        (to No. 3 CAN Junction Connector)
        *b to Airbag Sensor Assembly
        *c to Air Conditioning Amplifier Assembly*1
        *d to Radio and Display Receiver Assembly*2
        *e to Combination Meter Assembly
        *f to No. 1 CAN Junction Connector
        *g to Certification ECU (Smart Key ECU Assembly)*3
        *h to Clearance Warning ECU Assembly*4
        *i to Engine Stop and Start ECU*5
        *j to Driving Support ECU Assembly*6
        *k to Power Steering ECU Assembly
        *l to Steering Sensor (Spiral Cable with Sensor Sub-assembly)*7

        Connection diagram


        • *1: w/ Air Conditioning System

        • *2: for Radio and Display Type

        • *3: w/ Entry and Start System

        • *4: w/ Simple Intelligent Parking Assist System

        • *5: w/ Stop and Start System

        • *6: for 1ND-TV Engine with Cruise Control System

        • *7: w/ VSC

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

        Terminal No. (Symbol) Wiring Color Connected to
        E57-1 (CANH) V Airbag sensor assembly
        E57-12 (CANL) W
        E57-2 (CANH) Y Air conditioning amplifier assembly*1
        E57-13 (CANL) W
        E57-3 (CANH) G Radio and display receiver assembly*2
        E57-14 (CANL) W
        E57-4 (CANH) LG Combination meter assembly
        E57-15 (CANL) W
        E57-5 (CANH) L No. 1 CAN junction connector
        E57-16 (CANL) W
        E57-6 (CANH) R Certification ECU (Smart key ECU assembly)*3
        E57-17 (CANL) W
        E57-7 (CANH) B Clearance warning ECU assembly*4
        E57-18 (CANL) W
        E57-8 (CANH) P Engine stop and start ECU*5
        E57-19 (CANL) W
        E57-8 (CANH) P Driving support ECU assembly*6
        E57-19 (CANL) W
        E57-9 (CANH) GR Power steering ECU assembly
        E57-20 (CANL) W
        E57-10 (CANH) SB Steering sensor (Spiral cable with sensor sub-assembly)*7
        E57-21 (CANL) W

        • *1: w/ Air Conditioning System

        • *2: for Radio and Display Type

        • *3: w/ Entry and Start System

        • *4: w/ Simple Intelligent Parking Assist System

        • *5: w/ Stop and Start System

        • *6: for 1ND-TV Engine with Cruise Control System

        • *7: w/ VSC

  4. NO. 3 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 3 CAN junction connector.


      1. A01D5Q6C26
        *a

        Front view of wire harness connector

        (to No. 3 CAN Junction Connector)
        *b to Airbag Sensor Assembly
        *c to Air Conditioning Amplifier Assembly*1
        *d to Radio and Display Receiver Assembly*2
        *e to Combination Meter Assembly
        *f to No. 1 CAN Junction Connector
        *g to Certification ECU (Smart Key ECU Assembly)*3
        *h to Clearance Warning ECU Assembly*4
        *i to Power Steering ECU Assembly
        *j to Steering Sensor (Spiral Cable with Sensor Sub-assembly)
        *k to DLC3

        Connection diagram


        • *1: w/ Air Conditioning System

        • *2: for Radio and Display Type

        • *3: w/ Entry and Start System

        • *4: w/ Simple Intelligent Parking Assist System

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

        Terminal No. (Symbol) Wiring Color Connected to
        E57-1 (CANH) V Airbag sensor assembly
        E57-12 (CANL) W
        E57-2 (CANH) Y Air conditioning amplifier assembly*1
        E57-13 (CANL) W
        E57-3 (CANH) G Radio and display receiver assembly*2
        E57-14 (CANL) W
        E57-4 (CANH) LG Combination meter assembly
        E57-15 (CANL) W
        E57-5 (CANH) L No. 1 CAN junction connector
        E57-16 (CANL) W
        E57-6 (CANH) R Certification ECU (Smart key ECU assembly)*3
        E57-17 (CANL) W
        E57-7 (CANH) B Clearance warning ECU assembly*4
        E57-18 (CANL) W
        E57-9 (CANH) GR Power steering ECU assembly
        E57-20 (CANL) W
        E57-10 (CANH) SB Steering sensor (Spiral cable with sensor sub-assembly)
        E57-21 (CANL) W
        E57-11 (CANH) BE DLC3
        E57-22 (CANL) W

        • *1: w/ Air Conditioning System

        • *2: for Radio and Display Type

        • *3: w/ Entry and Start System

        • *4: w/ Simple Intelligent Parking Assist System

  5. DLC3


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

    2. A01D3W7C19
      *1 DLC3

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


      • *1: for LHD

      • *2: for RHD

    3. ECM (for 1NR-FE, 1ZR-FAE, 1ZR-FE or 2ZR-FE Engine)

      A01D4F1C01
      4. *a

      Component without harness connected

      (ECM)

      		 - -

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

  2. Disconnect the ECM connectors.

    A01D4AIC02
    *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 1ND-TV Engine)


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

    2. A01D6GKC10
    5. *a

    Front view of wire harness connector

    (to ECM)

    Disconnect the ECM connector.

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

  6. ECM (for 1AD-FTV Engine)


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

    2. A01D525C02
    7. *a

    Front view of wire harness connector

    (to ECM)

    Disconnect the ECM connectors.

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

  8. BRAKE ACTUATOR ASSEMBLY (w/ VSC)


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

    2. A01D46AC15
    9. *a

    Front view of wire harness connector

    (to Brake Actuator Assembly)

    Disconnect the brake actuator assembly connector.

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

  10. BRAKE ACTUATOR ASSEMBLY (for Type A)


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

    2. A01D46AC13
    11. *a

    Front view of wire harness connector

    (to Brake Actuator Assembly)

    Disconnect the brake actuator assembly connector.

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

  12. BRAKE ACTUATOR ASSEMBLY (for Type B)


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

    2. A01D4RBC07
    13. *a

    Front view of wire harness connector

    (to Brake Actuator Assembly)

    Disconnect the brake actuator assembly connector.

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

  14. AIRBAG SENSOR ASSEMBLY

    A01D4NIC08
    15. *a

    Component without harness connected

    (Airbag Sensor Assembly)

    		 - -

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

    2. Disconnect the airbag sensor assembly connector.

      A01D48IC05
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      		 - -

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

    4. MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

      A01D3O1C02
      5. *1 Main Body ECU (Multiplex Network Body ECU) *2 1 Connector
      *a

      Component without harness connected

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

      		 - -
      A01D61TC05
      *1 Main Body ECU (Multiplex Network Body ECU) *2 2 Connectors
      *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 (-) battery terminal.

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

        A01D4OSC01
        *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. STEERING SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY) (w/ VSC)


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

        2. A01D58TC07
        5. *a

        Front view of wire harness connector

        (to Steering Sensor (Spiral Cable with Sensor Sub-assembly))

        Disconnect the steering sensor (spiral cable with sensor sub-assembly) connector.

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

      6. POWER STEERING ECU ASSEMBLY

        A01D5A9C07
        7. *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.

          A01D4U3C05
          *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. CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Entry and Start System)


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

          2. A01D3NKC05
          5. *a

          Front view of wire harness connector

          (to Certification ECU (Smart Key ECU Assembly))

          Disconnect the certification ECU (smart key ECU assembly) connectors.

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

        6. COMBINATION METER ASSEMBLY


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

          2. A01D3S9C21
          7. *a

          Front view of wire harness connector

          (to Combination Meter Assembly)

          Disconnect the combination meter assembly connector.

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

        8. AIR CONDITIONING AMPLIFIER ASSEMBLY (w/ Automatic Air Conditioning System)


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

          2. A01D417C05
          9. *a

          Front view of wire harness connector

          (to Air Conditioning Amplifier Assembly)

          Disconnect the air conditioning amplifier assembly connector.

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

        10. AIR CONDITIONING AMPLIFIER ASSEMBLY (w/Manual Air Conditioning System)

          A01D64VC01
          11. *a

          Component without harness connected

          (Air Conditioning Amplifier Assembly)

          		 - -

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

          2. Disconnect the air conditioning amplifier assembly connector.

            A01D3ZGC01
            *1 DLC3 - -
            *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. RADIO AND DISPLAY RECEIVER ASSEMBLY (for Radio and Display Type) (w/o Navigation System)

            A01D616C10
            5. *a

            Component without harness connected

            (Radio and Display Receiver Assembly)

            		 - -

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

            2. Disconnect the radio and display receiver assembly connectors.

              A01D4ETC34
              *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. RADIO AND DISPLAY RECEIVER ASSEMBLY (for Radio and Display Type) (w/ Navigation System)

              A01D5J0C02
              5. *a

              Component without harness connected

              (Radio and Display Receiver Assembly)

              		 - -

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

              2. Disconnect the radio and display receiver assembly connectors.

                A01D4ETC09
                *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. ENGINE STOP AND START ECU (w/ Stop and Start System)


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

                2. A01D4DRC08
                5. *a

                Front view of wire harness connector

                (to Engine Stop and Start ECU)

                Disconnect the engine stop and start ECU connectors.

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

              6. AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) (w/ AFS (Adaptive Front-lighting System))


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

                2. A01D5VVC01
                7. *1 DLC3
                *a

                Front view of wire harness connector

                (to AFS ECU (Headlight Swivel ECU Assembly))

                Disconnect the AFS ECU (headlight swivel ECU assembly) connector.

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

              8. CLEARANCE WARNING ECU ASSEMBLY (w/ Simple Intelligent Parking Assist System)

                A01D3SPC01
                9. *a

                Component without harness connected

                (Clearance Warning ECU Assembly)

                		 - -

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

                2. Disconnect the clearance warning ECU assembly connector.

                  A01D3Z1C07
                  *1 DLC3 - -
                  *a

                  Front view of wire harness connector

                  (to Clearance Warning ECU Assembly)

                  		 - -

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

                4. DRIVING SUPPORT ECU ASSEMBLY (for 1ND-TV Engine with Cruise Control System)


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

                  2. A01D5PSC12
                  5. *a

                  Front view of wire harness connector

                  (to Driving Support ECU Assembly)

                  Disconnect the driving support ECU assembly connector.

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