CAN COMMUNICATION SYSTEM TERMINALS OF ECU

Note


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

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

  • After the power switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.

  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the power switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

  • This section describes the standard CAN 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 NO. 1 JUNCTION CONNECTOR (for LHD)


    1. Check the CAN No. 1 junction connector.


      1. Connection diagram

        A01J8F7E28
        Text in Illustration
        *1

        Front view of wire harness connector

        (to CAN No. 1 Junction Connector)

        		 *2 to Combination Meter
        *3 to Steering Angle Sensor *4 to Main Body ECU
        *5 to Power Steering ECU *6 to DLC3
        *7

        • to Navigation ECU Sub-assembly*1

        • to Radio and Display Receiver Assembly*2

        		 *8 to CAN No. 2 Junction Connector
        *9 to Yaw Rate Sensor *10 to Certification ECU
        *11 to Skid Control ECU - -

        *1: for Navigation receiver type

        *2: for Radio and display type

    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
      L94-1 (CANH) P Combination meter
      L94-12 (CANL) W
      L94-2 (CANH) L Steering angle sensor
      L94-13 (CANL) W
      L94-3 (CANH) BR Main body ECU
      L94-14 (CANL) W
      L94-4 (CANH) R Power steering ECU
      L94-15 (CANL) W
      L94-5 (CANH) W DLC3
      L94-16 (CANL) Y
      L94-6 (CANH) G

      • Navigation ECU sub-assembly*1

      • Radio and display receiver assembly*2
      L94-17 (CANL) W
      L94-7 (CANH) V CAN No. 2 junction connector
      L94-18 (CANL) W
      L94-8 (CANH) Y Yaw rate sensor
      L94-19 (CANL) L
      L94-9 (CANH) BE Certification ECU
      L94-20 (CANL) P
      L94-10 (CANH) LG Skid Control ECU
      L94-21 (CANL) L

      *1: for Navigation receiver type

      *2: for Radio and display type

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


    1. Check the CAN No. 2 junction connector.


      1. Connection diagram

        A01J8F7E29
        Text in Illustration
        *1

        Front view of wire harness connector

        (to CAN No. 2 Junction Connector)

        		 *2 to CAN No. 1 Junction Connector
        *3 to Center Airbag Sensor Assembly *4 to Transmission Control ECU
        *5 to Power Management Control ECU *6 to ECM

    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
      L95-3 (CANH) V CAN No. 1 junction connector
      L95-14 (CANL) W
      L95-5 (CANH) R Center airbag sensor assembly
      L95-16 (CANL) G
      L95-7 (CANH) Y Transmission control ECU
      L95-18 (CANL) BR
      L95-8 (CANH) B Power management control ECU
      L95-19 (CANL) W
      L95-9 (CANH) P ECM
      L95-20 (CANL) V

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


    1. Check the CAN No. 1 junction connector.


      1. Connection diagram

        A01J8F7E36
        Text in Illustration
        *1

        Front view of wire harness connector

        (to CAN No. 1 Junction Connector)

        		 *2 to Combination Meter
        *3 to Main Body ECU *4 to CAN No. 2 Junction Connector
        *5 to Yaw Rate Sensor *6 to Center Airbag Sensor Assembly
        *7 to Power Management Control ECU *8 to Transmission Control ECU

    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
      L94-1 (CANH) P Combination meter
      L94-12 (CANL) W
      L94-2 (CANH) BR Main body ECU
      L94-13 (CANL) W
      L94-3 (CANH) V CAN No. 2 junction connector
      L94-14 (CANL) W
      L94-4 (CANH) Y Yaw rate sensor
      L94-15 (CANL) L
      L94-5 (CANH) R Center airbag sensor assembly
      L94-16 (CANL) G
      L94-6 (CANH) B Power management control ECU
      L94-17 (CANL) W
      L94-7 (CANH) Y Transmission control ECU
      L94-18 (CANL) BR

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


    1. Check the CAN No. 2 junction connector.


      1. Connection diagram

        A01J8F7E37
        Text in Illustration
        *1

        Front view of wire harness connector

        (to CAN No. 2 Junction Connector)

        		 *2 to Steering Angle Sensor
        *3 to Power Steering ECU *4 to Skid Control ECU
        *5 to DLC3 *6

        • to Navigation ECU Sub-assembly*1

        • to Radio and Display Receiver Assembly*2
        *7 to CAN No. 1 Junction Connector *8 to Certification ECU
        *9 to ECM - -

        *1: for Navigation receiver type

        *2: for Radio and display type

    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
      L95-1 (CANH) L Steering angle sensor
      L95-12 (CANL) W
      L95-2 (CANH) R Power steering ECU
      L95-13 (CANL) W
      L95-3 (CANH) LG Skid control ECU
      L95-14 (CANL) L
      L95-4 (CANH) W DLC3
      L95-15 (CANL) Y
      L95-5 (CANH) G

      • Navigation ECU sub-assembly*1

      • Radio and display receiver assembly*2
      L95-16 (CANL) W
      L95-6 (CANH) V CAN No. 1 junction connector
      L95-17 (CANL) W
      L95-7 (CANH) BE Certification ECU
      L95-18 (CANL) P
      L95-9 (CANH) P ECM
      L95-20 (CANL) V

      *1: for Navigation receiver type

      *2: for Radio and display type

  5. CAN NO. 3 JUNCTION CONNECTOR


    1. Check the CAN No. 3 junction connector.


      1. Connection diagram

        A01JBIAE01
        Text in Illustration
        *1 CAN No. 3 Junction Connector *2 Junction Connector B Side
        *3 Junction Connector A Side *4 Earth Terminal
        *5

        Front view of wire harness connector

        (to CAN No. 3 Junction Connector)

        		 - -

    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
      L97-1 (CANH) P Power management control ECU
      L97-2 (CANL) V
      L98-1 (CANH) LG Seat belt control ECU
      L98-2 (CANL) L
      L99-1 (CANH) B Driving support ECU
      L99-2 (CANL) W
      L100-1 (CANH) Y Parking assist ECU
      L100-2 (CANL) BR

  6. CAN NO. 4 JUNCTION CONNECTOR


    1. Check the CAN No. 4 junction connector.


      1. Connection diagram

        A01J8F7E30
        Text in Illustration
        *1

        Front view of wire harness connector

        (to CAN No. 4 Junction Connector)

        		 *2 to Power Management Control ECU
        *3 to Air Conditioning Amplifier *4 to Skid Control ECU
        *5 to ECM - -

    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
      L101-12 (CANH) LG Power management control ECU
      L101-1 (CANL) L
      L101-13 (CANH) Y Air conditioning amplifier
      L101-2 (CANL) BR
      L101-14 (CANH) P Skid control ECU
      L101-3 (CANL) V
      L101-15 (CANH) B ECM
      L101-4 (CANL) W

  7. CAN NO. 5 JUNCTION CONNECTOR


    1. Check the CAN No. 5 junction connector.


      1. Connection diagram

        A01J8F7E39
        Text in Illustration
        *1

        Front view of wire harness connector

        (to CAN No. 5 Junction Connector)

        		 *2 to Millimeter Wave Radar Sensor
        *3 to Driving Support ECU - -

    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
      L102-1 (CANH) LG Millimeter wave radar sensor
      L102-12 (CANL) P
      L102-3 (CANH) Y Driving support ECU
      L102-14 (CANL) L

  8. DLC3


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

      A01JD49E07
      Text in Illustration
      *1 DLC3

  9. ECM


    1. Disconnect the ECM connectors.

      A01JCUGE10
      Text in Illustration
      *1 Front view of wire harness connector (to ECM)

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

    3. COMBINATION METER


      1. Disconnect the combination meter connector.

        A01JAOME06
      4. Text in Illustration
      *1 Front view of wire harness connector (to Combination Meter)

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

  11. POWER MANAGEMENT CONTROL ECU

    A01JA8UE14

    1. CAN No. 1 Bus Branch Wire


      1. A01JBLQE44
    12. Text in Illustration
    *1

    Rear view of wire harness connector

    (to Power Management Control ECU)

Disconnect the power management control ECU connector.

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

  • CAN No. 2 Bus Main Wire


    1. A01JCXFE02
    • Text in Illustration
    *1

    Rear view of wire harness connector

    (to Power Management Control ECU)

    Disconnect the power management control ECU connector.

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

  • Power Management Bus Main Wire


    1. A01JBLQE45
    • Text in Illustration
    *1

    Rear view of wire harness connector

    (to Power Management Control ECU)

    Disconnect the power management control ECU connector.

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

  • MAIN BODY ECU

    A01JCI7E11
    • Text in Illustration
    *1

    Instrument Panel Junction Block and Main Body ECU

    (w/o LED Headlight System, w/o Remote Air Conditioning System or w/o Theft Deterrent System)

    		 *2 LHD
    *3 RHD - -
    A01J9S6E08
    Text in Illustration
    *1

    Instrument Panel Junction Block and Main Body ECU

    (w/ LED Headlight System, w/ Remote Air Conditioning System or w/ Theft Deterrent System)

    		 *2 LHD
    *3 RHD - -

    1. Disconnect the main body ECU connector.

      A01J9RRE07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Main Body ECU)

      		 *2 DLC3

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

    3. SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER)


      1. A01JBTQE09
      4. Text in Illustration
      *1

      Front view of wire harness connector

      (to Skid Control ECU)

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

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

    5. STEERING ANGLE SENSOR


      1. A01J99HE37
      6. Text in Illustration
      *1

      Front view of wire harness connector

      (to Steering Angle Sensor)

      Disconnect the steering angle sensor connector.

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

    7. YAW RATE SENSOR


      1. A01JBWBE10
      8. Text in Illustration
      *1

      Front view of wire harness connector

      (to Yaw Rate Sensor)
      *2 DLC3

      Disconnect the yaw rate sensor connector.

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

    9. POWER STEERING ECU


      1. Disconnect the power steering ECU connectors.

        A01J8NGE05
      10. Text in Illustration
      *1 Front view of wire harness connector (to Power Steering ECU)

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

    11. CENTER AIRBAG SENSOR ASSEMBLY


      1. Disconnect the center airbag sensor assembly connector.

        A01JBCQE07
      12. Text in Illustration
      *1

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *2 DLC3

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

    13. CERTIFICATION ECU (SMART KEY ECU)


      1. Disconnect the certification ECU connector.

        A01JAA6E03
      14. Text in Illustration
      *1 Front view of wire harness connector (to Certification ECU)

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

    15. TRANSMISSION CONTROL ECU

      A01JA34E01

      1. A01JCCFE01
      16. Text in Illustration
      *1

      Front view of wire harness connector

      (to Transmission Control ECU)

      Disconnect the transmission control ECU connectors.

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

    17. RADIO AND DISPLAY RECEIVER ASSEMBLY (for Radio and Display Type)

      A01J9KNE29

      1. Disconnect the radio and display receiver assembly connectors.

        A01JD8LE19
      18. Text in Illustration
      *1 Front view of wire harness connector (to Radio and Display Receiver Assembly)

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

      2. NAVIGATION ECU SUB-ASSEMBLY (for Navigation Receiver Type)

        A01JCXOE03

        1. Disconnect the navigation ECU sub-assembly connectors.

          A01JD8LE20
        3. Text in Illustration
        *1 Front view of wire harness connector (to Navigation ECU Sub-assembly)

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

        2. AIR CONDITIONING AMPLIFIER


          1. Disconnect the air conditioning amplifier connector.

            A01JAOME07
          3. Text in Illustration
          *1 Front view of wire harness connector (to Air Conditioning Amplifier)

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

        4. SEAT BELT CONTROL ECU (w/ Pre-crash Safety System)

          A01J9ITE20

          1. A01JBCCE01
          5. Text in Illustration
          *1

          Front view of wire harness connector

          (to Seat Belt Control ECU)

          Disconnect the seat belt control ECU connectors.

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

        6. PARKING ASSIST ECU (w/ Intelligent Parking Assist System)

          A01JBNDE05

          1. A01JCGME02
          7. Text in Illustration
          *1

          Front view of wire harness connector

          (to Parking Assist ECU)

          Disconnect the parking assist ECU connector.

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

        8. DRIVING SUPPORT ECU (w/ Dynamic Radar Cruise Control System)

          A01J93RE17
          9. Text in Illustration
          *1

          Front view of wire harness connector

          (to Driving Support ECU)

          1. Disconnect the driving support ECU connector.

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

          3. MILLIMETER WAVE RADAR SENSOR (w/ Dynamic Radar Cruise Control System)


            1. A01J9CSE01
            4. Text in Illustration
            *1

            Front view of wire harness connector

            (to Millimeter Wave Radar Sensor)
            *2 DLC3

            Disconnect the millimeter wave radar sensor connector.

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