CAN COMMUNICATION SYSTEM(for RHD) 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 the CAN branch wire.

      CAUTION:

      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.

      • After turning the cable disconnected from negative (-) battery terminal, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work.

        Click here

      • 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

      B003JIFC01
      *1 No. 1 CAN Junction Connector - -
      *a

      Rear view of wire harness connector

      (to No. 1 CAN Junction Connector)

      		 - -
      No. 1 CAN Junction Connector Wiring Color Connect to
      G93-1 (CANH) B Brake actuator assembly (skid control ECU)
      G93-2 (CANL) W
      G94-1 (CANH) BE Spiral with sensor cable sub-assembly (steering angle sensor)
      G94-2 (CANL) W
      G95-1 (CANH) L DLC3
      G95-2 (CANL) W
      G96-1 (CANH) SB Combination meter assembly
      G96-2 (CANL) W
      G97-1 (CANH) LG No. 2 CAN junction connector
      G97-2 (CANL) W
      G98-1 (CANH) V Headlight leveling ECU assembly*2
      G98-2 (CANL) W
      G99-1 (CANH) G Certification ECU (smart key ECU assembly)*1
      G99-2 (CANL) W

      *1: w/ Smart Entry and Start System

      *2: for LED Headlight

    2. No. 2 CAN Junction Connector

      B003O1XC01
      *1 No. 2 CAN Junction Connector - -
      *a

      Rear view of wire harness connector

      (to No. 2 CAN Junction Connector)

      		 - -
      No. 2 CAN Junction Connector Wiring Color Connect to
      G120-1 (CANH) Y Airbag sensor assembly
      G120-2 (CANL) W
      G121-1 (CANH) GR Air conditioning amplifier assembly
      G121-2 (CANL) W
      G122-1 (CANH) B ECM
      G122-2 (CANL) W
      G123-1 (CANH) LG No. 1 CAN junction connector
      G123-2 (CANL) W
      G125-1 (CANH) R 4 wheel drive control ECU
      G125-2 (CANL) W
      G126-1 (CANH) V

      • Navigation receiver assembly*1

      • Radio and display receiver assembly*2
      G126-2 (CANL) W
      G128-1 (CANH) SB Multiplex network door ECU*3
      G128-2 (CANL) W

      *1: w/ Navigation System

      *2: w/ Audio and Visual System

      *3: w/ Power Back Door System

  3. CHECK DLC3


    1. B003M5NC14
      *a Front view of DLC3

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

      CAUTION:

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

      Note


      • After turning the cable disconnected from negative (-) battery terminal, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work.

        Click here

      • 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 Terminal Description Condition Specified Condition
      G7-6 (CANH) - G7-14 (CANL) L - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G7-6 (CANH) - G7-4 (CG) L - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G7-14 (CANL) - G7-4 (CG) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G7-6 (CANH) - G7-16 (BAT) L - G HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G7-14 (CANL) - G7-16 (BAT) W - G LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  4. CHECK ECM

    B003Q1QE03

    1. Disconnect the ECM connectors.

      B003KONC01
      *a

      Front view of wire harness connector

      (to ECM)

      		 - -

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G49-17 (CANH) - G49-28 (CANL) B - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      G49-17 (CANH) - C41-1 (E1) B - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G49-28 (CANL) - C41-1 (E1) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G49-17 (CANH) - G50-1 (BATT) B - Y HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G49-28 (CANL) - G50-1 (BATT) W - Y LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  5. CHECK COMBINATION METER ASSEMBLY

    B003PNAE30

    1. B003R15C36
      *a

      Rear view of wire harness connector

      (to Combination Meter Assembly)

      Disconnect the combination meter assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G8-36 (CANH) - G8-35 (CANL) SB - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      G8-36 (CANH) - G8-27 (EP) SB - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G8-35 (CANL) - G8-27 (EP) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G8-36 (CANH) - G8-21 (B) SB - W HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G8-35 (CANL) - G8-21 (B) W - W LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  6. CHECK AIRBAG SENSOR ASSEMBLY

    B003QXEE87

    1. B003KSOC06
      *a

      Rear view of wire harness connector

      (to Airbag Sensor Assembly)
      *b Front view of DLC3

      Disconnect the airbag sensor assembly connector.

      Click here

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G46-13 (CANH) - G46-22 (CANL) Y - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G46-13 (CANH) - G46-25 (E1) Y - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G46-22 (CANL) - G46-25 (E1) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G46-13 (CANH) - G7-16 (BAT) Y - G HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G46-22 (CANL) - G7-16 (BAT) W - G LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  7. CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

    B003P1XE03

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

      B003QUVC08
      *a

      Front view of wire harness connector

      (to Brake Actuator Assembly [Skid Control ECU])

      		 - -

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A4-22 (CANH) - A4-10 (CANL) B - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      A4-22 (CANH) - A4-25 (GND1) B - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A4-10 (CANL) - A4-25 (GND1) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A4-22 (CANH) - A4-13 (BM) B - R HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      A4-10 (CANL) - A4-13 (BM) W - R LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

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

    B003LN8E05

    1. B003QBOC10
      *a

      Front view of wire harness connector

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

      Disconnect the spiral with sensor 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 Terminal Description Condition Specified Condition
      G22-3 (CANH) - G22-2 (CANL) BE - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G22-3 (CANH) - G22-1 (ESS) BE - BR HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G22-2 (CANL) - G22-1 (ESS) W - BR LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G22-3 (CANH) - G22-5 (BAT) BE - W HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G22-2 (CANL) - G22-5 (BAT) W - W LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

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

    B003JL4E04

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

      B003KH8C06
      *a

      Front view of wire harness connector

      (to Certification ECU [Smart Key ECU Assembly])

      		 - -

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G17-40 (CANH) - G17-18 (CANL) G - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G17-40 (CANH) - G16-10 (E) G - BR HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G17-18 (CANL) - G16-10 (E) W - BR LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G17-40 (CANH) - G16-1 (+B) G - P HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G17-18 (CANL) - G16-1 (+B) W - P LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  10. CHECK NAVIGATION RECEIVER ASSEMBLY (w/ Navigation System)

    B003JVLE06

    1. B003K8EC14
      *a

      Front view of wire harness connector

      (to Navigation Receiver assembly)

      Disconnect the navigation receiver assembly connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G41-9 (CANH) - G41-10 (CANL) V - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G41-9 (CANH) - G43-7 (GND1) V - BR HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G41-10 (CANL) - G43-7 (GND1) W - BR LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G41-9 (CANH) - G43-4 (+B1) V - SB HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G41-10 (CANL) - G43-4 (+B1) W - SB LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  11. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY (w/ Audio and Visual System)

    B003RU4E04

    1. B003K8EC19
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

      Disconnect the radio and display receiver assembly connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G100-9 (CANH) - G100-10 (CANL) V - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G100-9 (CANH) - G102-7 (GND1) V - BR HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G100-10 (CANL) - G102-7 (GND1) W - BR LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G100-9 (CANH) - G102-4 (+B1) V - SB HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G100-10 (CANL) - G102-4 (+B1) W - SB LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  12. CHECK 4 WHEEL DRIVE CONTROL ECU

    B003K1BE02

    1. B003MCTC03
      *a

      Front view of wire harness connector

      (to 4 Wheel Drive Control ECU)

      Disconnect the 4 wheel drive control ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      C60-20 (CANH) - C60-40 (CANL) R - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      C60-20 (CANH) - C61-10 (GND) R - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      C60-40 (CANL) - C61-10 (GND) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      C60-20 (CANH) - C60-21 (+B) R - L HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      C60-40 (CANL) - C60-21 (+B) W - L LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  13. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for Automatic Air Conditioning System)

    B003MAQE02

    1. B003R15C37
      *a

      Rear view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      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 Terminal Description Condition Specified Condition
      G37-11 (TX+) - G37-12 (TX-) GR - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G37-11 (TX+) - G37-14 (GND) GR - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G37-12 (TX-) - G37-14 (GND) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G37-11 (TX+) - G37-21 (B) GR - W HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G37-12 (TX-) - G37-21 (B) W - W LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  14. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (for Manual Cooler System)

    B003QDTE07

    1. B003LVFC15
      *a

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)
      *b Front view of DLC3

      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 Terminal Description Condition Specified Condition
      G131-8 (TX+) - G131-9 (TX-) GR - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G131-8 (TX+) - G131-23 (GND) GR - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G131-9 (TX-) - G131-23 (GND) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G131-8 (TX+) - G7-16 (BAT) GR - G HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G131-9 (TX-) - G7-16 (BAT) W - G LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

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

    B003KD1E38

    1. B003KJKC06
      *a

      Front view of wire harness connector

      (to Headlight Leveling ECU Assembly)
      *b Front view of DLC3

      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 Terminal Description Condition Specified Condition
      G40-6 (CANH) - G40-7 (CANL) V - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G40-6 (CANH) - G40-9 (E1) V - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G40-7 (CANL) - G40-9 (E1) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G40-6 (CANH) - G7-16 (BAT) V - G HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G40-7 (CANL) - G7-16 (BAT) W - G LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

  16. CHECK MULTIPLEX NETWORK DOOR ECU (w/ Power Back Door System)

    B003OX3E07

    1. B003J4UC05
      *a

      Front view of wire harness connector

      (to Multiplex Network Door ECU)

      Disconnect the multiplex network door ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      V12-13 (CANP) - V12-14 (CANN) SB - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      V12-13 (CANP) - V13-7 (GND) SB - W-B HIGH-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      V12-14 (CANN) - V13-7 (GND) W - W-B LOW-level CAN bus wire - GND Cable disconnected from negative (-) battery terminal 200 Ω or higher
      V12-13 (CANP) - V13-8 (B) SB - G HIGH-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      V12-14 (CANN) - V13-8 (B) W - G LOW-level CAN bus wire - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kΩ or higher