CAN COMMUNICATION SYSTEM TERMINALS OF ECU

Tech Tips

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.


  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and CAN branch wire.

      CAUTION:

      For vehicles with an airbag system:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note


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

      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

  2. JUNCTION CONNECTOR


    1. No. 1 CAN Junction Connector

      A003FIUE01
      Text in Illustration
      *1 No. 1 CAN Junction Connector - -
      *a

      Front view of wire harness connector

      (to No. 1 CAN Junction Connector)

      		 - -
      No. 1 CAN Junction Connector Wiring Color Connect to
      H63-1 (CANH) B ECM
      H63-2 (CANL) W
      H66-1 (CANH) G Certification ECU (smart key ECU assembly)*1
      H66-2 (CANL) W
      H90-1 (CANH) P Headlight leveling ECU assembly*2
      H90-2 (CANL) W
      H93-1 (CANH) V Center airbag sensor assembly*3
      H93-2 (CANL) W
      H94-1 (CANH) L Brake actuator assembly (skid control ECU)*4
      H94-2 (CANL) W
      H95-1 (CANH) W Spiral cable sub-assembly (steering angle sensor)*5
      H95-2 (CANL) R
      H96-1 (CANH) W No. 2 CAN junction connector
      H96-2 (CANL) B

      • *1: w/ Smart Entry and Start System

      • *2: for LED Headlight

      • *3: w/ Airbag System

      • *4: w/ ABS

      • *5: w/ VSC

    2. No. 2 CAN Junction Connector

      A003FQ1E01
      Text in Illustration
      *1 No. 2 CAN Junction Connector - -
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Connector)

      		 - -
      No. 2 CAN Junction Connector Wiring Color Connect to
      H97-1 (CANH) R Air conditioning amplifier assembly*
      H97-2 (CANL) W
      H98-1 (CANH) Y DLC3
      H98-2 (CANL) W
      H99-1 (CANH) B Combination meter assembly
      H99-2 (CANL) W
      H100-1 (CANH) W No. 1 CAN junction connector
      H100-2 (CANL) B

      • *: w/ Air Conditioning System, except 5L-E

  3. CHECK DLC3


    1. A003I25E34
      Text in Illustration
      *a Front view of DLC3

      Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and CAN branch wire.

      CAUTION:

      For vehicles with an airbag system:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note


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

      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      H23-6 (CANH) - H23-14 (CANL) Y - W Ignition switch off 54 to 69 Ω
      H23-6 (CANH) - H23-4 (CG) Y - W-B Ignition switch off 200 Ω or higher
      H23-14 (CANL) - H23-4 (CG) W - W-B Ignition switch off 200 Ω or higher
      H23-6 (CANH) - H23-16 (BAT) Y - B Ignition switch off 6 kΩ or higher
      H23-14 (CANL) - H23-16 (BAT) W - B Ignition switch off 6 kΩ or higher

  4. CHECK ECM (for 1KD-FTV [w/ DPF])

    A003E2NE03
    Text in Illustration
    *A for V1 Bus *B for Powertrain Bus

    1. Disconnect the ECM connectors.

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

      for V1 Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B73-7 (CANH) - B73-6 (CANL) B - W Ignition switch off 108 to 132 Ω
      B73-7 (CANH) - D99-109 (E1) B - W-B Ignition switch off 200 Ω or higher
      B73-6 (CANL) - D99-109 (E1) W - W-B Ignition switch off 200 Ω or higher
      B73-7 (CANH) - B73-2 (BATT) B - W Ignition switch off 6 kΩ or higher
      B73-6 (CANL) - B73-2 (BATT) W - W Ignition switch off 6 kΩ or higher
      for Powertrain Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      D99-40 (CAN+) - D99-63 (CAN-) L - Y Ignition switch off 108 to 132 Ω
      D99-40 (CAN+) - D99-109 (E1) L - W-B Ignition switch off 200 Ω or higher
      D99-63 (CAN-) - D99-109 (E1) Y - W-B Ignition switch off 200 Ω or higher
      D99-40 (CAN+) - B73-2 (BATT) L - W Ignition switch off 6 kΩ or higher
      D99-63 (CAN-) - B73-2 (BATT) Y - W Ignition switch off 6 kΩ or higher

  5. CHECK ECM (for 1KD-FTV [w/o DPF])

    A003E2NE04
    Text in Illustration
    *A for V1 Bus *B for Powertrain Bus

    1. Disconnect the ECM connectors.

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

      for V1 Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B72-7 (CANH) - B72-6 (CANL) B - W Ignition switch off 108 to 132 Ω
      B72-7 (CANH) - D98-109 (E1) B - W-B Ignition switch off 200 Ω or higher
      B72-6 (CANL) - D98-109 (E1) W - W-B Ignition switch off 200 Ω or higher
      B72-7 (CANH) - B72-2 (BATT) B - W Ignition switch off 6 kΩ or higher
      B72-6 (CANL) - B72-2 (BATT) W - W Ignition switch off 6 kΩ or higher
      for Powertrain Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      D98-40 (CAN+) - D98-63 (CAN-) L - Y Ignition switch off 108 to 132 Ω
      D98-40 (CAN+) - D98-109 (E1) L - W-B Ignition switch off 200 Ω or higher
      D98-63 (CAN-) - D98-109 (E1) Y - W-B Ignition switch off 200 Ω or higher
      D98-40 (CAN+) - B72-2 (BATT) L - W Ignition switch off 6 kΩ or higher
      D98-63 (CAN-) - B72-2 (BATT) Y - W Ignition switch off 6 kΩ or higher

  6. CHECK ECM (for 2KD-FTV)

    A003E2NE05
    Text in Illustration
    *A for V1 Bus *B for Powertrain Bus

    1. Disconnect the ECM connectors.

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

      for V1 Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B88-6 (CANH) - B88-7 (CANL) B - W Ignition switch off 108 to 132 Ω
      B88-6 (CANH) - D105-109 (E1) B - BR Ignition switch off 200 Ω or higher
      B88-7 (CANL) - D105-109 (E1) W - BR Ignition switch off 200 Ω or higher
      B88-6 (CANH) - B88-2 (BATT) B - W Ignition switch off 6 kΩ or higher
      B88-7 (CANL) - B88-2 (BATT) W - W Ignition switch off 6 kΩ or higher
      for Powertrain Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B88-4 (CAN+) - B88-5 (CAN-) L - Y Ignition switch off 108 to 132 Ω
      B88-4 (CAN+) - D105-109 (E1) L - BR Ignition switch off 200 Ω or higher
      B88-5 (CAN-) - D105-109 (E1) Y - BR Ignition switch off 200 Ω or higher
      B88-4 (CAN+) - B88-2 (BATT) L - W Ignition switch off 6 kΩ or higher
      B88-5 (CAN-) - B88-2 (BATT) Y - W Ignition switch off 6 kΩ or higher

  7. CHECK ECM (for 1GD-FTV)

    A003DYJE88
    Text in Illustration
    *A for V1 Bus *B for Local Bus

    1. Disconnect the ECM connectors.

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

      for V1 Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B97-13 (CANH) - B97-26 (CANL) B - W Ignition switch off 108 to 132 Ω
      B97-13 (CANH) - D134-21 (E1) B - W-B Ignition switch off 200 Ω or higher
      B97-26 (CANL) - D134-21 (E1) W - W-B Ignition switch off 200 Ω or higher
      B97-13 (CANH) - B97-1 (BATT) B - W Ignition switch off 6 kΩ or higher
      B97-26 (CANL) - B97-1 (BATT) W - W Ignition switch off 6 kΩ or higher
      for Local Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B97-41 (CANU) - B97-56 (CAND) L - Y Ignition switch off 108 to 132 Ω
      B97-41 (CANU) - D134-21 (E1) L - W-B Ignition switch off 200 Ω or higher
      B97-56 (CAND) - D134-21 (E1) Y - W-B Ignition switch off 200 Ω or higher
      B97-41 (CANU) - B97-1 (BATT) L - W Ignition switch off 6 kΩ or higher
      B97-56 (CAND) - B97-1 (BATT) Y - W Ignition switch off 6 kΩ or higher

  8. CHECK ECM (for 1TR-FE, 2TR-FE [w/ Dual VVT-i])

    A003DYJE60

    1. Disconnect the ECM connectors.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B94-13 (CANH) - B94-26 (CANL) B - W Ignition switch off 108 to 132 Ω
      B94-13 (CANH) - D116-59 (E1) B - W-B Ignition switch off 200 Ω or higher
      B94-26 (CANL) - D116-59 (E1) W - W-B Ignition switch off 200 Ω or higher
      B94-13 (CANH) - B94-1 (BATT) B - W Ignition switch off 6 kΩ or higher
      B94-26 (CANL) - B94-1 (BATT) W - W Ignition switch off 6 kΩ or higher

  9. CHECK ECM (for 2TR-FE [w/o Dual VVT-i])

    A003E2NE06

    1. Disconnect the ECM connectors.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B71-8 (CANH) - B71-9 (CANL) B - W Ignition switch off 108 to 132 Ω
      B71-8 (CANH) - D97-105 (E1) B - W-B Ignition switch off 200 Ω or higher
      B71-9 (CANL) - D97-105 (E1) W - W-B Ignition switch off 200 Ω or higher
      B71-8 (CANH) - B71-20 (BATT) B - W Ignition switch off 6 kΩ or higher
      B71-9 (CANL) - B71-20 (BATT) W - W Ignition switch off 6 kΩ or higher

  10. CHECK ECM (for 5L-E)

    A003E2NE07

    1. Disconnect the ECM connectors.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B74-10 (CANH) - B74-11 (CANL) B - W Ignition switch off 108 to 132 Ω
      B74-10 (CANH) - D100-109 (E1) B - W-B Ignition switch off 200 Ω or higher
      B74-11 (CANL) - D100-109 (E1) W - W-B Ignition switch off 200 Ω or higher
      B74-10 (CANH) - B74-2 (BATT) B - W Ignition switch off 6 kΩ or higher
      B74-11 (CANL) - B74-2 (BATT) W - W Ignition switch off 6 kΩ or higher

  11. CHECK COMBINATION METER ASSEMBLY

    A003EWHE30

    1. Disconnect the combination meter assembly connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      H20-23 (CANH) - H20-22 (CANL) B - W Ignition switch off 108 to 132 Ω
      H20-23 (CANH) - H20-21 (E1) B - W-B Ignition switch off 200 Ω or higher
      H20-22 (CANL) - H20-21 (E1) W - W-B Ignition switch off 200 Ω or higher
      H20-23 (CANH) - H20-1 (L) B - R Ignition switch off 6 kΩ or higher
      H20-22 (CANL) - H20-1 (L) W - R Ignition switch off 6 kΩ or higher

  12. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (w/ Air Conditioning System, except 5L-E)

    A003EWHE31

    1. Disconnect the air conditioning amplifier assembly connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      H18-10 (CANH) - H18-11 (CANL) R - W Ignition switch off 54 to 69 Ω
      H18-10 (CANH) - H18-29 (GND) R - W-B Ignition switch off 200 Ω or higher
      H18-11 (CANL) - H18-29 (GND) W - W-B Ignition switch off 200 Ω or higher
      H18-10 (CANH) - H18-40 (B) R - W Ignition switch off 6 kΩ or higher
      H18-11 (CANL) - H18-40 (B) W - W Ignition switch off 6 kΩ or higher

  13. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Entry and Start System)

    A003FWFE02

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

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B76-40 (CANH) - B76-18 (CANL) G - W Ignition switch off 54 to 69 Ω
      B76-40 (CANH) - B75-10 (E) G - W-B Ignition switch off 200 Ω or higher
      B76-18 (CANL) - B75-10 (E) W - W-B Ignition switch off 200 Ω or higher
      B76-40 (CANH) - B75-1 (+B) G - L Ignition switch off 6 kΩ or higher
      B76-18 (CANL) - B75-1 (+B) W - L Ignition switch off 6 kΩ or higher

  14. CHECK HEADLIGHT LEVELING ECU ASSEMBLY (for LED Headlight)

    A003E3FE10

    1. Disconnect the headlight leveling ECU assembly connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      A39-6 (CANH) - A39-7 (CANL) P - W Ignition switch off 54 to 69 Ω
      A39-6 (CANH) - A39-9 (E1) P - W-B Ignition switch off 200 Ω or higher
      A39-7 (CANL) - A39-9 (E1) W - W-B Ignition switch off 200 Ω or higher
      A39-6 (CANH) - H23-16 (BAT) P - B Ignition switch off 6 kΩ or higher
      A39-7 (CANL) - H23-16 (BAT) W - B Ignition switch off 6 kΩ or higher

  15. CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (w/ VSC)

    A003DS4E02

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

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B92-22 (CANH) - B92-10 (CANL) L - W Ignition switch off 54 to 69 Ω
      B92-22 (CANH) - B92-25 (GND1) L - W-B Ignition switch off 200 Ω or higher
      B92-10 (CANL) - B92-25 (GND1) W - W-B Ignition switch off 200 Ω or higher
      B92-22 (CANH) - B92-13 (+BM) L - W Ignition switch off 6 kΩ or higher
      B92-10 (CANL) - B92-13 (+BM) W - W Ignition switch off 6 kΩ or higher

  16. CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (w/o VSC)

    A003CILE07

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

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B19-6 (CANH) - B19-5 (CANL) L - W Ignition switch off 54 to 69 Ω
      B19-6 (CANH) - B19-2 (GND) L - W-B Ignition switch off 200 Ω or higher
      B19-5 (CANL) - B19-2 (GND) W - W-B Ignition switch off 200 Ω or higher
      B19-6 (CANH) - B19-23 (+BM) L - W Ignition switch off 6 kΩ or higher
      B19-5 (CANL) - B19-23 (+BM) W - W Ignition switch off 6 kΩ or higher

  17. CHECK CENTER AIRBAG SENSOR ASSEMBLY (w/ Airbag System)

    A003ENBE01

    1. Disconnect the center airbag sensor assembly connector Click here.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      B4-13 (CANH) - B4-22 (CANL) V - W Ignition switch off 54 to 69 Ω
      B4-13 (CANH) - B4-25 (E1) V - W-B Ignition switch off 200 Ω or higher
      B4-22 (CANL) - B4-25 (E1) W - W-B Ignition switch off 200 Ω or higher
      B4-13 (CANH) - H23-16 (BAT) V - B Ignition switch off 6 kΩ or higher
      B4-22 (CANL) - H23-16 (BAT) W - B Ignition switch off 6 kΩ or higher

  18. CHECK SPIRAL CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR) (w/ VSC)

    A003FKME01

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

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      H92-3 (CANH) - H92-2 (CANL) W - R Ignition switch off 54 to 69 Ω
      H92-3 (CANH) - H92-1 (ESS) W - W-B Ignition switch off 200 Ω or higher
      H92-2 (CANL) - H92-1 (ESS) R - W-B Ignition switch off 200 Ω or higher
      H92-3 (CANH) - H92-5 (BAT) W - W Ignition switch off 6 kΩ or higher
      H92-2 (CANL) - H92-5 (BAT) R - W Ignition switch off 6 kΩ or higher

  19. CHECK TRANSMISSION CONTROL ECU ASSEMBLY (for 1KD-FTV, 2KD-FTV and Automatic Transmission)

    A003GY0E05

    1. Disconnect the transmission control ECU assembly connectors.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      O3-21 (CAN+) - O3-20 (CAN-) L - Y Ignition switch off 108 to 132 Ω
      O3-21 (CAN+) - O1-1 (E1) L - W-B Ignition switch off 200 Ω or higher
      O3-20 (CAN-) - O1-1 (E1) Y - W-B Ignition switch off 200 Ω or higher
      O3-21 (CAN+) - O3-5 (BATT) L - B Ignition switch off 6 kΩ or higher
      O3-20 (CAN-) - O3-5 (BATT) Y - B Ignition switch off 6 kΩ or higher