CAN COMMUNICATION SYSTEM DIAGNOSIS SYSTEM


  1. CHECK INSTALLED SYSTEMS (ECUS AND SENSORS) THAT ADOPT CAN COMMUNICATION


    1. Systems (ECUs and sensors) that adopt CAN communication vary depending on the vehicle's optional settings. Check which systems (ECUs and sensors) are installed on the vehicle.

      ECU/Sensor Name Check Method
      ABS and traction actuator (skid control ECU) With VSC
      Steering sensor With VSC
      Yaw rate sensor With VSC
      ECM Installed on all vehicles
      Transmission control ECU With multi-mode manual transaxle system

  2. DTC TABLE BY ECU

    Tech Tips


    • In the CAN communication system, CAN communication system DTCs output by the ECU can be displayed by using the intelligent tester.

    • If CAN communication system DTCs are output, trouble cannot be determined solely from the DTCs. Perform troubleshooting according to "How to Proceed with Troubleshooting" Click here.


    1. ABS AND TRACTION ACTUATOR (SKID CONTROL ECU)

      Tech Tips

      DTC communication uses the SIL line.

      DTC No. Detection Item
      U0100/65 Lost Communication with ECM/PCM
      U0123/62 Lost Communication with Yaw Rate Sensor Module
      U0126/63 Lost Communication with Steering Angle Sensor Module
      C1301 CAN Communication Stop

    2. ECM

      Tech Tips

      DTC communication uses the SIL line.

      DTC No. Detection Item
      U0122 Lost Communication with Vehicle Dynamics Control Module
      U0416 Invalid Data Received Stability Control Module
      U1000 CAN Communication Failure (No CAN Message)
      U1003 CAN BUS Failure

    3. TRANSMISSION CONTROL ECU

      For vehicle with multi-mode manual transaxle system

      Tech Tips

      DTC communication uses the SIL line.

      DTC No. Detection Item
      U0100 Lost Communication with ECM/PCM "A"

  3. DTC COMBINATION TABLE

    DTC Trouble Mode
    Output from Output DTC ABS and Traction Actuator (Skid Control ECU) Communication Stop Mode Steering Angle Sensor Communication Stop Mode Yaw Rate Sensor Communication Stop Mode ECM Communication Stop Mode Transmission Control ECU Communication Stop Mode
    ABS and Traction Actuator (Skid Control ECU) U0100/65 X X X ○ X
    U0123/62 X X ○ X X
    U0126/63 X ○ X X X
    C1301 ○ X X X X
    ECM U0122 ○ X X ○ X
    U0416 ○ X X ○ X
    U1000 ○ X X ○ X
    U1003 ○ X X ○ X
    Transmission on Control ECU*1 U0100 X X X ○ X

    Tech Tips


    • ○: Outputs under conditions shown above

    • X: Not set or may be set according to the malfunctioning part when one side of the CAN bus wire opens

    • *1: w/ Multi-mode manual transaxle system


    1. Perform troubleshooting according to the combination of DTCs output.


      • ABS and Traction Actuator (Skid Control ECU) Communication Stop Mode: Click here

      • Steering Angle Sensor Communication Stop Mode: Click here

      • Yaw Rate Sensor Communication Stop Mode: Click here

      • ECM Communication Stop Mode: Click here

      • Transmission Control ECU and ECM Communication Stop Mode: Click here