CAN COMMUNICATION SYSTEM DIAGNOSIS SYSTEM


  1. BUS CHECK (COMMUNICATION MALFUNCTION DTC)

    Tech Tips

    Only CAN communication system DTCs for each ECU can be displayed on the intelligent tester.


    1. A0119HZE01

      Select "Bus Check" from the "System Select" screen on the intelligent tester.

    2. A011BOY

      Select "Communication Malfunction DTC" from the "Bus Check" screen, and then select "Enter".

    3. A0118LY

      Select the system of the DTC to be checked and select "Details".

    4. A0119EG

      CAN communication system DTCs are displayed.

  2. BUS CHECK (COMMUNICATION BUS CHECK)

    Tech Tips

    The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the intelligent tester.


    1. A011BOY

      Select "Communication Bus Check" from the "Bus Check" screen.

    2. A0117RG

      The screen displays the ECUs and sensors that are properly connected to the CAN communication system.

      Tech Tips


      • If any properly connected ECUs or sensors are not displayed, there is a communication stop in the system Click here.

      • A011AQJ

        The default item displayed in the combo box is "ALL". When checking the ECUs (sensors) connected to each bus, pull down the combo box and select the bus to be checked from the drop down list. The drop down list displays "ALL", "V Bus", and the names of the remaining buses.

        Combo Box Display Content
        ALL All ECUs (sensors) connected to the CAN bus
        V Bus ECUs (sensors) connected to the V bus
        Bus Name ECUs (sensors) connected to the selected bus

      • The connection status (shown below) is indicated by the background color displayed behind the system name.

        ECU (Sensor) on V Bus
        Background Color Connection Status
        White Detected normally
        Yellow Could not be detected in the past, but is currently detected
        Red Detected in the past, but cannot be detected now
        Not displayed Has never been detected
        ECU (Sensor) with no Data Monitor History
        Background Color Connection Status
        White Detected normally
        Yellow Could not be detected in the past, but is currently detected
        Red Detected in the past, but cannot be detected now
        Not displayed Has never been detected
        ECU (Sensor) with no Data Monitor History
        Background Color Connection Status
        White Detected normally
        Yellow Could not be detected in the past, but is currently detected
        Red Detected in the past, but cannot be detected now
        Red Has never been detected but has connection history
        Not displayed Has never been detected and has no connection history
    3. A011A3Y

      "There is no system connected to the communication bus" is displayed if there are no ECUs or sensors connected to the CAN bus.

  3. CHECK INSTALLED SYSTEMS (ECU AND SENSOR) 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
      Brake actuator assembly (Skid control ECU) Installed on all vehicles
      Spiral cable sub-assembly (Steering sensor) Installed on all vehicles
      Steering column assembly (Power steering ECU) Installed on all vehicles
      Yaw rate sensor Installed on all vehicles
      ECM Installed on all vehicles
      Center airbag sensor assembly Installed on all vehicles
      Air conditioning amplifier assembly Installed on all vehicles
      Combination meter assembly (Combination meter ECU) Installed on all vehicles
      Main body ECU Installed on all vehicles
      Certification ECU With Entry and Start System
      Power management control ECU For 1KR-FE
      Power source control ECU For 1ND-TV

  4. 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. BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item
      U0073 Control Module Communication Bus OFF
      U0100 Lost Communication with ECM/PCM "A"
      U0123 Lost Communication with Yaw Rate Sensor Module
      U0124 Lost Communication with Lateral Acceleration Sensor Module
      U0126 Lost Communication with Steering Angle Sensor Module

    2. STEERING COLUMN ASSEMBLY (POWER STEERING ECU)

      Tech Tips

      DTC communication uses the SIL line.

      DTC No. Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0129 Lost Communication with Skid Control ECU
      U1103 Lost Communication Engine Stop and Start ECU

    3. AIR CONDITIONING AMPLIFIER ASSEMBLY

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0131 Lost Communication with Electric Power Steering ECU
      U0142* Lost Communication with Main Body ECU
      U0155 Lost Communication with Combination Meter

      *: for Automatic Air Conditioning System

    4. ECM

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item
      U0129 Lost Communication with Skid Control ECU
      U1103 Lost Communication Engine Stop and Start ECU

    5. COMBINATION METER ASSEMBLY (COMBINATION METER ECU)

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0129 Lost Communication with Skid Control ECU
      U0131 Lost Communication with Electric Power Steering ECU
      U0151 Lost Communication with Airbag ECU

    6. MAIN BODY ECU

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0101 Lost Communication with Skid Control ECU
      U0151 Lost Communication with Airbag ECU
      U0155 Lost Communication with Combination Meter
      U0327* Software Incompatibility with Vehicle Security
      U1133 Lost Communication with Power Management Module

      *: w/ Entry and Start System

    7. CERTIFICATION ECU

      Tech Tips


      • DTC communication uses the CAN communication system.

      • Vehicle with entry and start system only.

      DTC No. Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0142 Lost Communication with Skid Control ECU
      U0155 Lost Communication with Combination Meter

    8. POWER MANAGEMENT CONTROL ECU

      Tech Tips


      • DTC communication uses the CAN communication system.

      • for 1KR-FE and 1NR-FE only

      DTC No. Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U1002 Lost Communication with Gateway Module

    9. POWER SOURCE CONTROL ECU

      Tech Tips


      • DTC communication uses the CAN communication system.

      • for 1ND-TV only

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

    10. ENGINE STOP AND START ECU

      Tech Tips


      • DTC communication uses the CAN communication system.

      • Vehicle with engine stop and start system only

      DTC No. Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0121 Lost Communication with Brake System Control Module
      U0131 Lost Communication with Power Steering Control Module
      U0140 Lost Communication with Main Body Control Module
      U0151 Lost Communication with Airbag Control Module
      U0155 Lost Communication with Combination Meter
      U0164 Lost Communication with Air Conditioning Amplifier

    11. CENTER AIRBAG SENSOR ASSEMBLY

      Tech Tips

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

    12. SPIRAL CABLE SUB-ASSEMBLY (STEERING SENSOR)

      Tech Tips

      The steering angle sensor is connected to the CAN communication system but CAN communication DTCs are not output.

    13. YAW RATE SENSOR

      Tech Tips

      The yaw rate sensor is connected to the CAN communication system but CAN communication DTCs are not output.

  5. DTC COMBINATION TABLE


    1. V Bus

      DTC Trouble Mode
      Output from Output DTC Air Conditioning Amplifier Communication Stop Mode Brake Actuator Assembly (Skid Control ECU) Communication Stop Mode ECM Communication Stop Mode
      Air Conditioning Amplifier Assembly U0100 ○*1 X ○
      U0131 ○*1 X X
      U0142*3 ○*1 X X
      U0155 ○*1 X X
      Brake Actuator Assembly (Skid Control ECU) U0073 X ○*1 X
      U0100 X ○*1 ○
      U0123 X ○*1 X
      U0124 X ○*1 X
      U0126 X ○*1 X
      ECM U0129 X ○ ○*1
      U1103*7 X X ○*1
      Main Body ECU U0100*6 X X ○
      U0101*6 X X ○
      U0151*6 X X X
      U0155*6 X X X
      U0327*2, *6 X X X
      U1133*6 X X X
      Combination Meter Assembly (Combination Meter ECU) U0100 X X ○
      U0129 X ○ X
      U0131 X X X
      U0151 X X X
      Certification ECU*2 U0100*2 X X ○
      U0142*2 X X X
      U0155*2 X X X
      Steering Column Assembly (Power Steering ECU) U0100 X X ○
      U0129 X ○ X
      U1103*7 X X X
      Power Management Control ECU*4 U0100*4 X X ○
      Power Source Control ECU*5 U0100*5 X X ○
      Engine Stop and Start ECU*7 U0100 X X ○
      U0121 X ○ X
      U0131 X X X
      U0140 X X X
      U0151 X X X
      U0155 X X X
      U0164 ○ X X

      Tech Tips


      • ○: Stored

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

      • *1: This DTC cannot be output when CAN communication is suspended.

      • *2: w/ Entry and Start System

      • *3: for Automatic Air Conditioning System

      • *4: for 1KR-FE and 1NR-FE with Entry and Start System

      • *5: for 1ND-TV with Entry and Start System

      • *6: w/ Double Locking Function

      • *7: w/ Stop and Start System

      DTC Trouble Mode
      Output from Output DTC Center Airbag Sensor Communication Stop Mode Main Body ECU Communication Stop Mode Combination Meter ECU Communication Stop Mode
      Air Conditioning Amplifier Assembly U0100 X X X
      U0131 X X X
      U0142*3 X ○ X
      U0155 X X ○
      Brake Actuator Assembly (Skid Control ECU) U0073 X X X
      U0100 X X X
      U0123 X X X
      U0124 X X X
      U0126 X X X
      ECM U0129 X X X
      U1103*7 X X X
      Main Body ECU U0100*6 X ○*1 X
      U0101*6 X ○*1 X
      U0151*6 ○ ○*1 X
      U0155*6 X ○*1 ○
      U0327*2, *6 X ○*1 X
      U1133*6 X ○*1 X
      Combination Meter Assembly (Combination Meter ECU) U0100 X X ○*1
      U0129 X X ○*1
      U0131 X X ○*1
      U0151 ○ X ○*1
      Certification ECU*2 U0100*2 X X X
      U0142*2 X ○ X
      U0155*2 X X ○
      Steering Column Assembly (Power Steering ECU) U0100 X X X
      U0129 X X X
      U1103*7 X X X
      Power Management Control ECU*4 U0100*4 X X X
      Power Source Control ECU*4 U0100*5 X X X
      Engine Stop and Start ECU*7 U0100 X X X
      U0121 X X X
      U0131 X X X
      U0140 X ○ X
      U0151 ○ X X
      U0155 X X ○
      U0164 X X X

      Tech Tips


      • ○: Stored

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

      • *1: This DTC cannot be output when CAN communication is suspended.

      • *2: w/ Entry and Start System

      • *3: for Automatic Air Conditioning System

      • *4: for 1KR-FE and 1NR-FE with Entry and Start System

      • *5: for 1ND-TV with Entry and Start System

      • *6: w/ Double Locking Function

      • *7: w/ Stop and Start System

      DTC Trouble Mode
      Output from Output DTC Yaw Rate Sensor Communication Stop Mode Certification ECU Communication Stop Mode Steering Angle Sensor Communication Stop Mode
      Air Conditioning Amplifier Assembly U0100 X X X
      U0131 X X X
      U0142*3 X X X
      U0155 X X X
      Brake Actuator Assembly (Skid Control ECU) U0073 X X X
      U0100 X X X
      U0123 ○ X X
      U0124 ○ X X
      U0126 X X ○
      ECM U0129 X X X
      U1103*7 X X X
      Main Body ECU U0100*6 X X X
      U0101*6 X X X
      U0151*6 X X X
      U0155*6 X X X
      U0327*2, *6 X ○ X
      U1133*6 X X X
      Combination Meter Assembly (Combination Meter ECU) U0100 X X X
      U0129 X X X
      U0131 X X X
      U0151 X X X
      Certification ECU*2 U0100*2 X ○*1 X
      U0142*2 X ○*1 X
      U0155*2 X ○*1 X
      Steering Column Assembly (Power Steering ECU) U0100 X X X
      U0129 X X X
      U1103*7 X X X
      Power Management Control ECU*4 U0100*4 X X X
      Power Source Control ECU*5 U0100*5 X X X
      Engine Stop and Start ECU*7 U0100 X X X
      U0121 X X X
      U0131 X X X
      U0140 X X X
      U0151 X X X
      U0155 X X X
      U0164 X X X

      Tech Tips


      • ○: Stored

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

      • *1: This DTC cannot be output when CAN communication is suspended.

      • *2: w/ Entry and Start System

      • *3: for Automatic Air Conditioning System

      • *4: for 1KR-FE and 1NR-FE with Entry and Start System

      • *5: for 1ND-TV with Entry and Start System

      • *6: w/ Double Locking Function

      • *7: w/ Stop and Start System

      DTC Trouble Mode
      Output from Output DTC Power Steering ECU Communication Stop Mode Power Management Control ECU Communication Stop Mode Power Source Control ECU Communication Stop Mode Engine Stop and Start ECU Communication Stop Mode
      Air Conditioning Amplifier Assembly U0100 X X X X
      U0131 ○ X X X
      U0142*3 X X X X
      U0155 X X X X
      Brake Actuator Assembly (Skid Control ECU) U0073 X X X X
      U0100 X X X X
      U0123 X X X X
      U0124 X X X X
      U0126 X X X X
      ECM U0129 X X X X
      U1103*7 X X X ○
      Main Body ECU U0100*6 X X X X
      U0101*6 X X X X
      U0151*6 X X X X
      U0155*6 X X X X
      U0327*2, *6 X X X X
      U1133*6 X ○ ○ X
      Combination Meter Assembly (Combination Meter ECU) U0100 X X X X
      U0129 X X X X
      U0131 ○ X X X
      U0151 X X X X
      Certification ECU*2 U0100*2 X X X X
      U0142*2 X X X X
      U0155*2 X X X X
      Steering Column Assembly (Power Steering ECU) U0100 ○*1 X X X
      U0129 ○*1 X X X
      U1103*7 ○*1 X X ○
      Power Management Control ECU*4 U0100*4 X ○*1 X X
      Power Source Control ECU*5 U0100*5 X X ○*1 X
      Engine Stop and Start ECU*7 U0100 X X X ○*1
      U0121 X X X X*1
      U0131 ○ X X X*1
      U0140 X X X X*1
      U0151 X X X X*1
      U0155 X X X X*1
      U0164 X X X X*1

      Tech Tips


      • ○: Stored

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

      • *1: This DTC cannot be output when CAN communication is suspended.

      • *2: w/ Entry and Start System

      • *3: for Automatic Air Conditioning System

      • *4: for 1KR-FE and 1NR-FE with Entry and Start System

      • *5: for 1ND-TV with Entry and Start System

      • *6: w/ Double Locking Function

      • *7: w/ Stop and Start System

    2. Power Management Bus

      DTC Trouble Mode
      Output from Output DTC Power Management Control ECU Communication Stop Mode Power Source Control ECU Communication Stop Mode ECM Communication Stop Mode
      Power Management Control ECU U0100*2 ○ - ○
      U1002*2 ○ - ○

      Tech Tips


      • ○: Stored

      • -: None

      • *2: w/ Entry and Start System