CAN COMMUNICATION SYSTEM(w/o Central Gateway ECU) 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 or any 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 NO. 1 JUNCTION CONNECTOR (for LHD)


    1. Check the CAN No. 1 junction connector (engine room main wire side).


      1. Connection diagram

        B005YVUE02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 1 Junction Connector)

        		 *b

        to ECM

        (for V Bus)
        *c

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

        (for V Bus)

        		 *d

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

        (for Sub Bus 15)
        *e

        to ECM

        (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
        A67-1 (CANH) P

        ECM

        (for V bus)
        A67-7 (CANL) V
        A67-2 (CANH) LG

        Brake booster with master cylinder assembly (Skid control ECU)

        (for V bus)
        A67-8 (CANL) L
        A67-3 (CANH) P

        Brake booster with master cylinder assembly (Skid control ECU)

        (for Sub bus 15)
        A67-9 (CANL) V
        A67-4 (CANH) B

        ECM

        (for Sub bus 15)
        A67-10 (CANL) W

    2. Check the CAN No. 1 junction connector (instrument panel wire side).


      1. Connection diagram

        B005XSEE03
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 1 Junction Connector)

        		 *b

        to CAN No. 5 Junction Connector

        (for Sub Bus 15)
        *c

        Main body ECU (Multiplex Network Body ECU)

        (for V Bus)

        		 *d

        to CAN No. 2 Junction Connector

        (for V Bus)

      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
        L132-3 (CANH) R

        CAN No. 5 junction connector

        (for Sub bus 15)
        L132-9 (CANL) Y
        L132-5 (CANH) SB

        Main body ECU (Multiplex network body ECU)

        (for V bus)
        L132-11 (CANL) W
        L132-6 (CANH) B

        CAN No. 2 junction connector

        (for V bus)
        L132-12 (CANL) W

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


    1. Check the CAN No. 1 junction connector (engine room main wire side).


      1. Connection diagram

        B005YSXE02
        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 V Bus)
        *c

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

        (for Sub Bus 15)

        		 *d

        to ECM

        (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
        A67-1 (CANH) LG

        Brake booster with master cylinder assembly (Skid control ECU)

        (for V bus)
        A67-7 (CANL) L
        A67-3 (CANH) P

        Brake booster with master cylinder assembly (Skid control ECU)

        (for Sub bus 15)
        A67-9 (CANL) V
        A67-4 (CANH) B

        ECM

        (for Sub bus 15)
        A67-10 (CANL) W

    2. Check the CAN No. 1 junction connector (instrument panel wire side).


      1. Connection diagram

        B005XSEE03
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 1 Junction Connector)

        		 *b

        to CAN No. 5 Junction Connector

        (for Sub Bus 15)
        *c

        to CAN No. 2 Junction Connector

        (for V Bus)

        		 *d

        Combination Meter Sub-assembly

        (for V Bus)

      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
        L132-3 (CANH) R

        CAN No. 5 junction connector

        (for Sub bus 15)
        L132-9 (CANL) Y
        L132-5 (CANH) GR

        CAN No. 2 junction connector

        (for V bus)
        L132-11 (CANL) W
        L132-6 (CANH) SB

        Combination meter sub-assembly

        (for V bus)
        L132-12 (CANL) G

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


    1. Check the CAN No. 2 junction connector (instrument panel connector holder left side).


      1. Connection diagram

        B005Z3PE02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 2 Junction Connector)

        		 *b

        to CAN No. 3 Junction Connector

        (for V Bus)
        *c

        to CAN No. 1 Junction Connector

        (for V Bus)

        		 *d

        to Certification ECU (Smart Key ECU Assembly)

        (for V Bus)
        *e

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

        (for V Bus)

        		 - -

      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
        L94-2 (CANH) GR

        CAN No. 3 junction connector

        (for V bus)
        L94-1 (CANL) W
        L94-5 (CANH) B

        CAN No. 1 junction connector

        (for V bus)
        L94-4 (CANL) W
        L94-8 (CANH) B

        Certification ECU (Smart key ECU assembly)

        (for V bus)
        L94-7 (CANL) W
        L94-11 (CANH) B

        Spiral cable with sensor sub-assembly (Steering angle sensor)

        (for V bus)
        L94-10 (CANL) W

    2. Check the CAN No. 2 junction connector (instrument panel connector holder right side).


      1. Connection diagram

        B005YB3E03
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 2 Junction Connector)

        		 *b

        to Power Steering ECU Assembly

        (for V Bus)
        *c

        to Air Conditioning Amplifier Assembly

        (for V Bus)

        		 *d

        to Airbag ECU Assembly

        (for V Bus)
        *e

        to Radio and Display Receiver Assembly

        (for Radio and Display Type)

        (for V Bus)

        		 *f

        to DLC3

        (for V Bus)

      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
        L95-2 (CANH) R

        Power steering ECU assembly

        (for V bus)
        L95-3 (CANL) W
        L95-5 (CANH) B

        Air conditioning amplifier assembly

        (for V bus)
        L95-6 (CANL) W
        L95-8 (CANH) B

        Airbag ECU assembly

        (for V bus)
        L95-9 (CANL) W
        L95-11 (CANH) L

        Radio and display receiver assembly*

        (for V bus)
        L95-12 (CANL) W
        L95-14 (CANH) G

        DLC3

        (for V bus)
        L95-15 (CANL) W

        *: for Radio and Display Type

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


    1. Check the CAN No. 2 junction connector (instrument panel connector holder left side).


      1. Connection diagram

        B005XQ3E02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 2 Junction Connector)

        		 *b

        to CAN No. 1 Junction Connector

        (for V Bus)
        *c

        to CAN No. 3 Junction Connector

        (for V Bus)

        		 *d

        to Certification ECU (Smart Key ECU Assembly)

        (for V Bus)
        *e

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

        (for V Bus)

        		 - -

      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
        L94-1 (CANH) GR

        CAN No. 1 junction connector

        (for V bus)
        L94-2 (CANL) W
        L94-4 (CANH) B

        CAN No. 3 junction connector

        (for V bus)
        L94-5 (CANL) W
        L94-7 (CANH) B

        Certification ECU (Smart key ECU assembly)

        (for V bus)
        L94-8 (CANL) W
        L94-10 (CANH) B

        Spiral cable with sensor sub-assembly (Steering angle sensor)

        (for V bus)
        L94-11 (CANL) W

    2. Check the CAN No. 2 junction connector (instrument panel connector holder right side).


      1. Connection diagram

        B005ZHAE02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 2 Junction Connector)

        		 *b

        to Power Steering ECU Assembly

        (for V Bus)
        *c

        to Air Conditioning Amplifier Assembly

        (for V Bus)

        		 *d

        to Airbag ECU Assembly

        (for V Bus)
        *e

        • to Navigation Receiver Assembly

          (for Navigation Receiver Type)

        • to Radio and Display Receiver Assembly

          (for Radio and Display Type)

        (for V Bus)

        		 *f

        to DLC3

        (for V Bus)

      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) R

        Power steering ECU assembly

        (for V bus)
        L95-2 (CANL) W
        L95-6 (CANH) B

        Air conditioning amplifier assembly

        (for V bus)
        L95-5 (CANL) W
        L95-9 (CANH) B

        Airbag ECU assembly

        (for V bus)
        L95-8 (CANL) W
        L95-12 (CANH) L

        • Navigation receiver assembly*1

        • Radio and display receiver assembly*2

        (for V bus)
        L95-11 (CANL) W
        L95-15 (CANH) G

        DLC3

        (for V bus)
        L95-14 (CANL) W

        *1: for Navigation Receiver Type

        *2: for Radio and Display Type

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


    1. Check the CAN No. 3 junction connector (engine room main wire side).


      1. Connection diagram

        B005YU3E02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 3 Junction Connector)

        		 *b

        to Transmission Control ECU Assembly

        (for V Bus)

      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
        A68-1 (CANH) Y

        Transmission control ECU assembly

        (for V bus)
        A68-7 (CANL) BR

    2. Check the CAN No. 3 junction connector (instrument panel wire side).


      1. Connection diagram

        B005Z7ME03
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 3 Junction Connector)

        		 *b

        to Hybrid Vehicle Control ECU

        (for V Bus)
        *c

        to CAN No. 2 Junction Connector

        (for V Bus)

        		 *d

        to Combination Meter Sub-assembly

        (for V Bus)

      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
        L133-4 (CANH) V

        Hybrid vehicle control ECU

        (for V bus)
        L133-10 (CANL) P
        L133-5 (CANH) GR

        CAN No. 2 junction connector

        (for V bus)
        L133-11 (CANL) W
        L133-6 (CANH) SB

        Combination meter sub-assembly

        (for V bus)
        L133-12 (CANL) G

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


    1. Check the CAN No. 3 junction connector (engine room main wire side).


      1. Connection diagram

        B005Y3LE02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 3 Junction Connector)

        		 *b

        ECM

        (for V Bus)
        *c

        to Transmission Control ECU Assembly

        (for V Bus)

        		 - -

      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
        A68-1 (CANH) P

        ECM

        (for V bus)
        A68-7 (CANL) V
        A68-2 (CANH) Y

        Transmission control ECU assembly

        (for V bus)
        A68-8 (CANL) BR

    2. Check the CAN No. 3 junction connector (instrument panel wire side).


      1. Connection diagram

        B005Z7ME03
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 3 Junction Connector)

        		 *b

        to Hybrid Vehicle Control ECU

        (for V Bus)
        *c

        to Main body ECU (Multiplex Network Body ECU)

        (for V Bus)

        		 *d

        to CAN No. 2 Junction Connector

        (for V Bus)

      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
        L133-4 (CANH) V

        Hybrid vehicle control ECU

        (for V bus)
        L133-10 (CANL) P
        L133-5 (CANH) SB

        Main body ECU (Multiplex network body ECU)

        (for V bus)
        L133-11 (CANL) W
        L133-6 (CANH) B

        CAN No. 2 junction connector

        (for V bus)
        L133-12 (CANL) W

  7. CAN NO. 5 JUNCTION CONNECTOR


    1. Check the CAN No. 5 junction connector (instrument panel connector holder left side).


      1. Connection diagram

        B005YY9E02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 5 Junction Connector)

        		 *b

        to CAN No. 1 Junction Connector

        (for Sub Bus 15)

      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
        L101-2 (CANH) R

        CAN No. 1 junction connector

        (for Sub bus 15)
        L101-4 (CANL) Y

    2. Check the CAN No. 5 junction connector (instrument panel connector holder right side).


      1. Connection diagram

        B005XZ9E02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to CAN No. 5 Junction Connector)

        		 *b

        to Hybrid Vehicle Control ECU

        (for Sub Bus 15)

      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
        L102-5 (CANH) B

        Hybrid vehicle control ECU

        (for Sub bus 15)
        L102-3 (CANL) W

  8. DLC3


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

      B005ZMOE01
      Text in Illustration
      *1 DLC3 - -

    2. HYBRID VEHICLE CONTROL ECU

      B005XJTE01
      3. Text in Illustration
      *a

      Component without harness connected

      (Hybrid Vehicle Control ECU)

      		 - -

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

      2. B005XYLE03
        Text in Illustration
        *a

        Rear view of wire harness connector

        (to Hybrid Vehicle Control ECU)

        Disconnect the L6 hybrid vehicle control ECU connector.

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

      4. ECM

        B005YXSE03
        5. Text in Illustration
        *a

        Component without harness connected

        (ECM)

        		 - -

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

    2. Disconnect the A57 and D28 ECM connectors.

      B005Z9YE01
      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. TRANSMISSION CONTROL ECU ASSEMBLY

      B005XP0E01
      5. Text in Illustration
      *a

      Component without harness connected

      (Transmission Control ECU Assembly)

      		 - -

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

  2. B005YLCE02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Transmission Control ECU Assembly)

    Disconnect the A23 and A24 transmission control ECU assembly connectors.

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

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


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

    2. B005YE6E02
    5. Text in Illustration
    *a

    Front view of wire harness connector

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

Disconnect the A58 brake booster with master cylinder assembly (skid control ECU) connector.

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

  • AIRBAG ECU ASSEMBLY

    B005YDEE01
    • Text in Illustration
    *a

    Component without harness connected

    (Airbag ECU Assembly)

    		 - -

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

    2. Disconnect the L16 airbag ECU assembly connector.

      B005XCHE02
      Text in Illustration
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Airbag ECU Assembly)

      		 - -

    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)

      B005ZQYE03
      5. Text in Illustration
      *A for LHD *B for RHD
      *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))

      		 - -
      B005XRIE04
      Text in Illustration
      *A for LHD *B for RHD
      *1 Main Body ECU (Multiplex Network Body ECU) *2 3 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 (-) auxiliary battery terminal.

      2. Disconnect the L201 main body ECU (multiplex network body ECU) connector.

        B005ZAME02
        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. SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY (STEERING ANGLE SENSOR)


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

        2. B005YQIE05
        5. Text in Illustration
        *a

        Front view of wire harness connector

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

        Disconnect the L51 spiral cable with sensor sub-assembly (steering angle sensor) connector.

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

      6. POWER STEERING ECU ASSEMBLY

        B005YEZE01
        7. Text in Illustration
        *a

        Component without harness connected

        (Power Steering ECU Assembly)

        		 - -

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

        2. Disconnect the A27 and L54 power steering ECU assembly connectors.

          B005Z19E01
          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. CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

          B005ZE6E01
          5. Text in Illustration
          *a

          Component without harness connected

          (Certification ECU (Smart Key ECU Assembly))

          		 - -

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

          2. Disconnect the L195 and L197 certification ECU (smart key ECU assembly) connectors.

            B005XR2E04
            Text in Illustration
            *a

            Front view of wire harness connector

            (to Certification ECU (Smart Key ECU 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)

            B005YF4E02
            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 L35 and L167 radio and display receiver assembly connectors.

              B005YDYE02
              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 RECEIVER ASSEMBLY (for Navigation Receiver Type)

              B005YI7E02
              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 L38 and L171 navigation receiver assembly connectors.

                B005Y8UE02
                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. COMBINATION METER SUB-ASSEMBLY

                B005Y8SE02
                5. Text in Illustration
                *a

                Component without harness connected

                (Combination Meter Sub-assembly)

                		 - -

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

                2. Disconnect the L27 combination meter sub-assembly connector.

                  B005Z35E02
                  Text in Illustration
                  *a

                  Front view of wire harness connector

                  (to Combination Meter Sub-assembly)

                  		 - -

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

                4. AIR CONDITIONING AMPLIFIER ASSEMBLY

                  B005Y4JE03
                  5. Text in Illustration
                  *a

                  Component without harness connected

                  (Air Conditioning Amplifier Assembly)

                  		 - -

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

                  2. Disconnect the L17 air conditioning amplifier assembly connector.

                    B005YGME01
                    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.