CAN COMMUNICATION SYSTEM(w/ 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.

    Click here

  • 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


  • The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.

  • 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. Connection diagram

        B0043DRC39
        *a

        Front view of wire harness connector

        (to No. 1 CAN Junction Connector)

        		 *b to No. 3 CAN Junction Connector
        *c to Main Body ECU (Multiplex Network Body ECU) *d

        to Headlight Leveling ECU Assembly

        (w/ Automatic Headlight Beam Level Control System)
        *e to Brake Actuator Assembly *f to ECM
        *g to Central Gateway ECU (Network Gateway ECU) *h to No. 16 Junction Connector

      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
        A32-3 (CANH) G Main body ECU (multiplex network body ECU)
        A32-14 (CANL) W
        A32-4 (CANH) Y Headlight leveling ECU assembly*
        A32-15 (CANL) W
        A32-5 (CANH) V Brake actuator assembly
        A32-16 (CANL) W
        A32-6 (CANH) B ECM
        A32-17 (CANL) W
        A32-10 (CANH) P Central gateway ECU (network gateway ECU)
        A32-21 (CANL) W
        A32-11 (CANH) P No. 16 junction connector
        A32-22 (CANL) W

        • *: w/ Automatic Headlight Beam Level Control System

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


    1. Check the No. 3 CAN junction connector.


      1. Connection diagram

        B0043DRC33
        *a

        Front view of wire harness connector

        (to No. 3 CAN Junction Connector)

        		 *b to Airbag Sensor Assembly
        *c to Air Conditioning Amplifier Assembly *d to Combination Meter Assembly
        *e to No. 1 CAN Junction Connector *f

        to Certification ECU (Smart Key ECU Assembly)

        (w/ Entry and Start System)
        *g

        to Clearance Warning ECU Assembly

        (w/ Simple Intelligent Parking Assist System)

        		 *h

        to Engine Stop and Start ECU

        (w/ Stop and Start System)
        *i to Power Steering ECU with Motor Assembly *j to Steering Sensor (Spiral Cable with Sensor Sub-assembly)
        *k to Central Gateway ECU (Network Gateway ECU) - -

      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
        E57-13 (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)*1
        E57-17 (CANL) W
        E57-7 (CANH) B Clearance warning ECU assembly*2
        E57-18 (CANL) W
        E57-8 (CANH) P Engine stop and start ECU*3
        E57-19 (CANL) W
        E57-9 (CANH) GR Power steering ECU with motor assembly
        E57-20 (CANL) W
        E57-10 (CANH) SB Steering sensor (spiral cable with sensor sub-assembly)
        E57-21 (CANL) W
        E57-11 (CANH) SB Central gateway ECU (network gateway ECU)
        E57-22 (CANL) W

        • *1: w/ Entry and Start System

        • *2: w/ Simple Intelligent Parking Assist System

        • *3: w/ Stop and Start System

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


    1. Check the No. 1 CAN junction connector.


      1. Connection diagram

        B0043DRC46
        *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

        (w/ Stop and Start System)

        		 *d to Main Body ECU (Multiplex Network Body ECU)
        *e to Brake Actuator Assembly *f to ECM
        *g to Central Gateway ECU (Network Gateway ECU) *h to No. 16 Junction Connector

      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*
        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
        A32-10 (CANH) P Central gateway ECU (network gateway ECU)
        A32-21 (CANL) W
        A32-11 (CANH) P No. 16 junction connector
        A32-22 (CANL) W

        • *: w/ Stop and Start System

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


    1. Check the No. 3 CAN junction connector.


      1. Connection diagram

        B0043DRC35
        *a

        Front view of wire harness connector

        (to No. 3 CAN Junction Connector)

        		 *b to Airbag Sensor Assembly
        *c

        to Air Conditioning Amplifier Assembly

        (w/ Air Conditioning System)

        		 *d to Combination Meter Assembly
        *e to No. 1 CAN Junction Connector *f to Power Steering ECU with Motor Assembly
        *g to Steering Sensor (Spiral Cable with Sensor Sub-assembly) *h to Central Gateway ECU (Network Gateway ECU)

      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*
        E57-13 (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
        E57-9 (CANH) GR Power steering ECU with motor assembly
        E57-20 (CANL) W
        E57-10 (CANH) SB Steering sensor (spiral cable with sensor sub-assembly)
        E57-21 (CANL) W
        E57-11 (CANH) SB Central gateway ECU (network gateway ECU)
        E57-22 (CANL) W

        • *: w/ Air Conditioning System

  5. NO. 16 JUNCTION CONNECTOR


    1. Check the No. 16 junction connector.


      1. Connection diagram

        B0043DRC40
        *a

        Front view of wire harness connector

        (to No. 16 Junction Connector)

        		 *b to Pre-crash Safety City Sensor
        *c to No. 1 CAN Junction Connector *d to Central Gateway ECU (Network Gateway ECU)
        *e

        to Radio and Display Receiver Assembly

        (for Radio and Display Type)

        		 - -

      2. Check the connection diagram of the components which are connected to the No. 16 junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        E140-1 (CANH) B Pre-crash safety city sensor
        E140-12 (CANL) W
        E140-2 (CANH) P No. 1 CAN junction connector
        E140-13 (CANL) W
        E140-3 (CANH) L Central gateway ECU (network gateway ECU)
        E140-14 (CANL) W
        E140-9 (CANH) Y Radio and display receiver assembly*
        E140-20 (CANL) W
        E140-10 (CANH) P Central gateway ECU (network gateway ECU)
        E140-21 (CANL) W
        E140-11 (CANH) V Central gateway ECU (network gateway ECU)
        E140-22 (CANL) W

        • *: for Radio and Display Type

  6. DLC3


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

    2. B00453SC15
      *1 DLC3

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

    3. CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

      B00423GC07
      4. *a

      Component without harness connected

      (Central Gateway ECU (Network Gateway ECU))

      		 - -

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

  2. Disconnect the E139 central gateway ECU (network gateway ECU) connector.

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

    B0042SWC11
    *a

    Front view of wire harness connector

    (to Central Gateway ECU (Network Gateway ECU))

    		 - -

  4. STEERING SENSOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)

    B00443MC02
    5. *a

    Component without harness connected

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

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

    2. Disconnect the E19 steering sensor (spiral cable with sensor sub-assembly) connector.

    3. B0042PLC07
      *a

      Front view of wire harness connector

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

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

    4. ECM (for 1NR-FE)

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the A50 and B31 ECM connectors.

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

        B004356C08
      5. *a

      Front view of wire harness connector

      (to ECM)

      		 - -

    5. ECM (for 1ZR-FAE)

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the A50 and B186 ECM connectors.

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

        B0044IKC01
      6. *a

      Front view of wire harness connector

      (to ECM)

      		 - -

    6. ECM (for 1ND-TV with Glow Plug Controller)

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the A169 ECM connector.

      3. B0042BPC57
      7. *a

      Front view of wire harness connector

      (to ECM)

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

    7. BRAKE ACTUATOR ASSEMBLY

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the A97 brake actuator assembly connector.

      3. B0041RZC48
      8. *a

      Front view of wire harness connector

      (to Brake Actuator Assembly)

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

    8. AIRBAG SENSOR ASSEMBLY

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the E14 airbag sensor assembly connector.

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

        B0042ZLC37
      9. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      		 - -

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

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the E22 main body ECU (multiplex network body ECU) connector.

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

        B0043IHC02
      10. *1 DLC3 - -
      *a

      Front view of wire harness connector

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

      		 - -

    10. POWER STEERING ECU WITH MOTOR ASSEMBLY

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the A53 and E30 power steering ECU with motor assembly connectors.

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

        B0043GYC02
      11. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Power Steering ECU with Motor Assembly)

      		 - -

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

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the E33 and E35 certification ECU (smart key ECU assembly) connectors.

      3. B004483C09
      12. *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

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

    12. COMBINATION METER ASSEMBLY

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the E46 combination meter assembly connector.

      3. B0042U0C67
      13. *a

      Front view of wire harness connector

      (to Combination Meter Assembly)

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

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

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the E28 air conditioning amplifier assembly connector.

      3. B0043L7C25
      14. *a

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

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

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

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the E62 air conditioning amplifier assembly connector.

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

        B00445EC03
      15. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      		 - -

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

      Refer to Terminals of ECU.



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

      2. Disconnect the E1 and E60 radio and display receiver assembly connectors.

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

        B0042S6C53
      16. *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

      		 - -

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

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the A8 and E24 engine stop and start ECU connectors.

      3. B00451KC36
      17. *a

      Front view of wire harness connector

      (to Engine Stop and Start ECU)

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

    17. HEADLIGHT LEVELING ECU ASSEMBLY (w/ Automatic Headlight Beam Level Control System)

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the A182 headlight leveling ECU assembly connector.

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

        B00422JC12
      18. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Headlight Leveling ECU Assembly)

      		 - -

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

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the E98 clearance warning ECU assembly connector.

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

        B0043D5C18
      19. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Clearance Warning ECU Assembly)

      		 - -

    19. PRE-CRASH SAFETY CITY SENSOR

      Refer to Terminals of ECU.

      Click here


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

      2. Disconnect the O9 pre-crash safety city sensor connector.

      3. B004310C02
      20. *1 DLC3
      *a

      Front view of wire harness connector

      (to Pre-crash Safety City Sensor)

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