CAN COMMUNICATION SYSTEM DIAGNOSIS SYSTEM


  1. BUS CHECK


    1. Select "Bus Check" from "System Select".

  2. CHECK INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION


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

      ECU/Sensor Name Tester Display Installed on
      ECM ECM (Engine) All vehicles
      Combination meter assembly Combination Meter All vehicles
      Air conditioning amplifier assembly Air Conditioning Amplifier For vehicles with an air conditioning system, except 5L-E
      Certification ECU (smart key ECU assembly) Certification (Smart) For vehicles with a smart entry and start system
      Headlight leveling ECU assembly Headlight swivel (AFS) For vehicles with an LED headlight
      Center airbag sensor assembly Airbag For vehicles with an airbag system
      Brake actuator assembly (skid control ECU) Skid Control (ABS/VSC/TRAC) For vehicles with an ABS
      Spiral with sensor cable sub-assembly (steering angle sensor) Spiral cable (Steering Angle Sensor) For vehicles with a VSC
  3. DTC TABLE BY ECU

    Tech Tips


    • In the CAN communication system, CAN communication system DTCs stored by an ECU can be output by using the GTS.

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


    1. ECM

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0101*1 Lost Communication with TCM
      U010E*2 Lost Communication with Reductant Control Module
      U029D*2 Lost Communication with NOx Sensor "A"

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

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100* Lost Communication with ECM/PCM "A"

      • *: Refer to Electronic Controlled Automatic Transmission System Click here.

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

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      B1499 Communication Malfunction (Engine&Meter ECU)
    4. COMBINATION METER ASSEMBLY

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0129 Lost Communication with Brake System Control Module
      U0151 Lost Communication with Restraints Control Module
      U0182 Lost Communication with Lighting Control Module Front
    5. CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Entry and Start System)

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100 Lost Communication With ECM/PCM "A"
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module
    6. HEADLIGHT LEVELING ECU ASSEMBLY (for LED Headlight)

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module
      U1000* CAN Communication Failure(Message Registry)

    7. BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (w/ ABS)

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0073 Control Module Communication Bus OFF
      U0100 Lost Communication with ECM/PCM "A"
      U0124 Lost Communication With Lateral Acceleration Sensor Module
      U0126 Lost Communication With Steering Angle Sensor Module
    8. CENTER AIRBAG SENSOR ASSEMBLY (w/ Airbag System)

      Tech Tips

      The center airbag sensor assembly is connected to the CAN communication system, but CAN communication DTCs are not output.

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

      Tech Tips

      The spiral cable sub-assembly (steering angle sensor) is connected to the CAN communication system, but CAN communication DTCs are not output.

  4. DTC COMBINATION TABLE


    • ○: Stored.

    • X: When one side of branch wire is open, storage may occur.

    • -: Not stored.

      Output from Output DTC Detection Item Detected Communication Stop Mode
      V1 Bus
      ECM Communication Stop Mode Air Conditioning Amplifier Communication Stop Mode Combination Meter ECU Communication Stop Mode Certification ECU Communication Stop Mode
      Air conditioning amplifier assembly B1499 Communication Malfunction (Engine&Meter ECU) X
      Combination meter assembly U0100 Lost Communication with ECM/PCM "A" X X
      U0129 Lost Communication with Brake System Control Module X X X
      U0151 Lost Communication with Restraints Control Module X X X
      U0182 Lost Communication with Lighting Control Module Front X X X
      Certification ECU (smart key ECU assembly) U0100 Lost Communication With ECM/PCM "A" X X
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X
      Headlight leveling ECU assembly U0100 Lost Communication with ECM/PCM "A" X X X
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X
      Brake actuator assembly (skid control ECU) U0073 Control Module Communication Bus OFF X X X X
      U0100 Lost Communication with ECM/PCM "A" X X X
      U0124 Lost Communication With Lateral Acceleration Sensor Module X X X X
      U0126 Lost Communication With Steering Angle Sensor Module X X X X
      Output from Output DTC Detection Item Detected Communication Stop Mode
      V1 Bus
      AFS ECU Communication Stop Mode Skid Control ECU Communication Stop Mode Steering Angle Sensor Communication Stop Mode Center Airbag Sensor Communication Stop Mode
      Air conditioning amplifier assembly B1499 Communication Malfunction (Engine&Meter ECU) X X X X
      Combination meter assembly U0100 Lost Communication with ECM/PCM "A" X X X X
      U0129 Lost Communication with Brake System Control Module X X X
      U0151 Lost Communication with Restraints Control Module X X X
      U0182 Lost Communication with Lighting Control Module Front X X X
      Certification ECU (smart key ECU assembly) U0100 Lost Communication With ECM/PCM "A" X X X X
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X X
      Headlight leveling ECU assembly U0100 Lost Communication with ECM/PCM "A" X X X
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X
      Brake actuator assembly (skid control ECU) U0073 Control Module Communication Bus OFF X X X
      U0100 Lost Communication with ECM/PCM "A" X X X
      U0124 Lost Communication With Lateral Acceleration Sensor Module X X
      U0126 Lost Communication With Steering Angle Sensor Module X X