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Diagnosis System

  1. CAN BUS CHECK 
    1. Using the Techstream, select "CAN Bus Check" from the "System Select".
  2. CHECK FOR INSTALLED SYSTEMS (ECUS & SENSORS) THAT ADOPT CAN COMMUNICATION 
    1. Systems (ECUs, sensors) that adopt CAN communication vary depending on the vehicle's optional settings. Check which systems (ECUs, sensors) are installed on the vehicle.
      ECU/SENSOR CHECK METHOD REFERENCE

      ECU/Sensor name Check method
      Skid control ECU Installed on all vehicles
      Steering sensor Installed on all vehicles
      Yaw rate sensor Installed on all vehicles
      HV control ECU Installed on all vehicles
      Network gateway ECU Installed on all vehicles
      Power steering ECU Installed on all vehicles
      Distance control ECU Dynamic laser cruise control
  3. DTC TABLE BY ECU 

    HINT:

    • In the CAN communication system, CAN communication system DTCs can be displayed by the ECU using the Techstream.
    • If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to "HOW TO PROCEED WITH TROUBLESHOOTING " . (If, however, U0235 is output alone, see DYNAMIC LASER CRUISE CONTROL SYSTEM .)
    1. HV control ECU (HV)

      HINT:

      • DTC communication uses the CAN communication system.
      • Distance control ECU data is also output.
        DTC DETECTION ITEM REFERENCE

        DTC No. Detection Item
        P3108-594 A/C Amplifier Communication Circuit Malfunction
        P0A1D-615 Communication Error from HV ECU
        U0100-211 Lost Communication With ECM/PCM "A"
        U0100-212 Lost Communication With ECM/PCM "A"
        U0100-530 Lost Communication With ECM/PCM "A"
        U0100-774 Lost Communication With ECM/PCM "A"
        U0100-784 Lost Communication With ECM/PCM "A"
        U0122-732 Lost Communication With Vehicle Dynamics Control Module
        U0123-736 Lost Communication Error of Yaw Rate Sensor
        U0126-735 Lost Communication With Steering Angle Sensor Module
        U0129-220 Lost Communication With Brake System Control Module
        U0129-222 Lost Communication With Brake System Control Module
        U0129-528 Lost Communication With Brake System Control Module
        U0129-529 Lost Communication With Brake System Control Module
        U0293-730 Lost Communication With Distance Control ECU
        U0293-733 Lost Communication With Vehicle Dynamics Control Module
        U0131-433 Lost Communication With Power Steering Control Module
        U0131-434 Lost Communication With Power Steering Control Module
        U0146-435 Lost Communication With Gateway "A"
        U1101-728 Lost Communication With Distance Control ECU
      • *1: Displayed on the "communication malfunction DTCs" screen of the Techstream. If U0235 is output alone, the CAN communication system is normal (See DTC U0235 LOST COMMUNICATION WITH CRUISE CONTROL FRONT DISTANCE RANGE SENSOR for U0235).
      • Check for INFORMATION (See DTC CHECK / CLEAR ).
      • U0110-159, U0110-160, U0110-656, and U0110-657 are not the DTCs for the CAN communication system. Therefore, refer to the HOW TO PROCEED WITH TROUBLESHOOTING for the hybrid control system.
    2. HV control ECU (ENGINE)
      DTC DETECTION ITEM REFERENCE

      DTC No. Detection Item
      U0001 Control Module Communication Bus Off
      U0293 Communication Error from HV ECU
    3. Skid control ECU

      HINT:

      DTC communication uses the SIL line.

      DTC DETECTION ITEM REFERENCE

      DTC No. Detection Item
      U0073 Control Module Communication Bus Off
      U0123 Lost Communication With Yaw Rate Sensor Module
      U0124 Lost Communication With Lateral Acceleration Sensor Module
      U0126 Lost Communication With Steering Angle Sensor Module
      U0293-152 Lost Communication With HV Control Module
      U0293-153 Lost Communication With HV Control Module
      U0293-154 Lost Communication With HV Control Module

      HINT:

      Check for INFORMATION (See DTC CHECK / CLEAR ).

    4. Power steering ECU

      HINT:

      DTC communication uses the SIL line.

      DTC DETECTION ITEM REFERENCE

      DTC No. Detection Item
      U0073 Control Module Communication Bus Off
      U0105 Lost Communication With ECM/PCM "A"
      U0121 Lost Communication With Anti-lock Brake System (ABS) Control Module
    5. Gateway ECU

      HINT:

      The gateway ECU is connected to the CAN communication system, but CAN communication DTCs are not output.

  4. DTC COMBINATION TABLE 
    DTC COMBINATION CHART

    DTC Trouble Mode
    Output from Output DTC HYBRID CONTROL ECU COMMUNICATION STOP MODE SKID CONTROL ECU COMMUNICATION STOP MODE STEERING SENSOR COMMUNICATION STOP MODE YAW RATE SENSOR COMMUNICATION STOP MODE POWER STEERING COMMUNICATION STOP MODE DISTANCE CONTROL ECU COMMUNICATION STOP MODE GATEWAY ECU COMMUNICATION STOP MODE
    HV control ECU (HV) U0100-xxx *1 - X X X X X X
    P0A1D-615 - X X X X X X
    U0129-220, 528 *2 - ◦ X X X X X
    U0131-433,434 - X X X ◦ X X
    U0146-435 - X X X X X ◦
    P3108-594 - X X X X X ◦
    U0122-732 - ↑
    During driving    		 X X X X X
    U0123-736 - X X ↑
    During driving    		 X X X
    U0126-735 - X ↑
    During driving    		 X X X X
    U0293-730 - X X X X X X
    U0293-733 - X X X X X X
    U1101-728 - X X X X ↑
    During driving    		 X
    HV control ECU (Engine) U0001 *1 - X X X X X X
    U0293 *1 - X X X X X X
    Skid control ECU U0123 X - X ◦ X X X
    U0124 X - X ◦ X X X
    U0126 X - ◦ X X X X
    U0293 ◦ - X X X X X
    Power steering ECU U0073 X X X X - X X
    U0105 ↑
    During driving    		 X X X - X X
    U0121 X ◦ X X - X X
    HINT:
    • ◦: Output
    • ↑: Outputs under the following condition
    • X: Not output
    • *1: If only the following DTCs for the CAN communication system are output, refer to the HOW TO PROCEED WITH TROUBLESHOOTING for the hybrid control system.
    • *2: If the HV control ECU outputs DTC U0129-222, refer to the HOW TO PROCEED WITH TROUBLESHOOTING for DTC U0293 output from the skid control ECU. If DTC U0129-529 is output, check for DTCs of the skid control ECU.

    DTC Output ECU 

    DTC OUTPUT ECU REFERENCE

    DTC Output ECU DTC No.
    HV control ECU (HV)
    • U0100-211
    • U0100-212
    • U0100-530
    • U0100-774
    • U0100-784
    HV control ECU (engine)
    • U0001
    • U023
    1. Perform troubleshooting according to the combination of DTCs output.

      HINT:

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