CAN COMMUNICATION SYSTEM DIAGNOSIS SYSTEM


  1. BUS CHECK (COMMUNICATION MALFUNCTION ECU)

    Only CAN communication system DTCs for each ECU can be output to the intelligent tester.


    1. A00DQS1

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

    2. A00DQI4

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

    3. A00DTKZ

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

    4. A00DR72

      CAN communication system DTCs are output.

  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. A00DQI4

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

    2. 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.

      • A00DQ5A

        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 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. A00DTSX

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

  3. 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 Engine All vehicles
      Brake actuator assembly (VSC ECU) ABS/VSC/TRAC Vehicles w/ Vehicle Stability Control System
      Brake actuator assembly (ABS ECU) ABS/VSC/TRAC Vehicles w/o Vehicle Stability Control System
      Yaw rate sensor Yaw Rate / Deceleration Sensor Vehicles w/ Vehicle Stability Control System
      Spiral cable sub-assembly (steering angle sensor) Steering Angle Sensor Vehicles w/ Vehicle Stability Control System
      Power steering ECU assembly EPS All vehicles
      Parking brake with bracket actuator assembly (electric parking brake ECU) Electric Parking Brake All vehicles
      Air conditioning amplifier assembly Air Conditioner All vehicles
      Center airbag sensor assembly SRS Airbag All vehicles
      Certification ECU Entry & Start / Wireless Tuner Vehicles w/ Entry and Start System
      Main body ECU (instrument panel junction block assembly) Main Body All vehicles
      Combination meter assembly Combination Meter All vehicles
      Power management control ECU

      Power Management1

      Power Management2

      		 All vehicles
      Headlight swivel ECU assembly (AFS ECU) AFS/HL AutoLeveling Vehicle w/ Adaptive Front-lighting System
      Multiplex tilt and telescopic ECU Tilt&Telescopic Vehicles for Power Tilt and Power Telescopic Steering Column
      Position control ECU assembly Driver Seat Vehicles w/ Seat Position Memory System

  4. DTC TABLE BY ECU

    Tech Tips


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

    • 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".


    1. BRAKE ACTUATOR ASSEMBLY (VSC ECU)


      • For vehicles w/ Vehicle Stability Control System.

      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"
      U0123 Lost Communication with Yaw Rate Sensor Module
      U0126 Lost Communication with Steering Angle Sensor Module

    2. BRAKE ACTUATOR ASSEMBLY (ABS ECU)


      • For vehicles w/o Vehicle Stability Control System.

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0073 Control Module Communication Bus OFF

    3. ECM/ECT

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0129 Lost Communication with Brake System Control Module

    4. MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100*1 Lost Communication with ECM/PCM "A"
      U0101*1 Lost Communication with TCM
      U0151*1 Lost Communication with Restraints Control Module
      U0155*1 Lost Communication with Instrument Panel Cluster (IPC) Control Module
      U0208*2 Lost Communication with "Seat Control Module A"
      U0327*1 Software Incompatibility with Vehicle Security Control Module
      U1002*2 Lost Communication with Gateway Module (MS Bus)
      U1106*1 Lost Communication with Electric Parking Brake Module
      U1115*2 Lost Communication with Tilt & Telescopic Module
      U1133*1 Lost Communication with PMN Module

      • *1: w/ Seat Position Memory System or Theft Deterrent System

      • *2: w/ Seat Position Memory System

    5. 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

    6. MULTIPLEX TILT AND TELESCOPIC ECU


      • For vehicles for Power Tilt and Power Telescopic Steering Column.

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      B2621 Communication Interruption
      B2624* Vehicle Speed Malfunction

      Tech Tips

      *: Refer to Power Tilt and Power Telescopic Steering Column System Click here.

    7. CENTER AIRBAG SENSOR ASSEMBLY

      Tech Tips

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

    8. CERTIFICATION ECU


      • For vehicles w/ Entry and Start System.

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0142 Lost Communication with Body Control Module "B"
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module

    9. AIR CONDITIONING AMPLIFIER ASSEMBLY

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0131 Lost Communication with Power Steering Control Module
      U0142 Lost Communication with Body Control Module "B"
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module

    10. POSITION CONTROL ECU ASSEMBLY


      • For vehicles w/ Position Seat Memory System.

      Tech Tips

      The position control ECU and switch is connected to the CAN communication system but CAN communication DTCs are not stored.

    11. YAW RATE SENSOR


      • For vehicles w/ Vehicle Stability Control System.

      Tech Tips

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

    12. SPIRAL CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR)


      • For vehicles w/ Vehicle Stability Control System.

      Tech Tips

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

    13. POWER STEERING ECU 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

    14. HEADLIGHT SWIVEL ECU ASSEMBLY (AFS ECU)


      • For vehicles w/ Adaptive Front-lighting System.

      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"
      U0101 Lost Communication with TCM
      U0126 Lost Communication with Steering Angle Sensor Module
      U0129 Lost Communication with Brake System Control Module
      U0142 Lost Communication with Body Control Module "B"

    15. PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY (ELECTRIC PARKING ECU)

      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
      U0129 Lost Communication with Brake System Control Module

    16. POWER MANAGEMENT CONTROL ECU (Power Management1)


      • For vehicles w/ Entry and Start System.

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0182 Lost Communication with Lighting Control Module Front
      U1002 Lost Communication with Gateway Module (V2 Bus)

    17. POWER MANAGEMENT CONTROL ECU (Power Management2)

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U1002 Lost Communication with Gateway Module (Power Management Bus)

  5. DTC COMBINATION TABLE

    Output from Output DTC Detection Item Detected Communication Stop Mode
    V1 Bus
    Center Airbag Sensor Communication Stop Mode Main Body ECU*3 Communication Stop Mode Air Conditioning Amplifier Communication Stop Mode ECM Communication Stop Mode
    Certification ECU U0100 Lost Communication with ECM/PCM "A" X X X ○
    U0142 Lost Communication with Body Control Module "B" X ○ X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X X
    Main body ECU (instrument panel junction block assembly) U1002 Lost Communication with Gateway Module (MS Bus) - - - -
    U0208 Lost Communication with "Seat Control Module A" - - - -
    U1115 Lost Communication with Tilt & Telescopic Module - - - -
    U0100 Lost Communication with ECM/PCM "A" X ○*1 X ○
    U0101 Lost Communication with TCM X ○*1 X ○
    U0151 Lost Communication with Restraints Control Module ○ ○*1 X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X ○*1 X X
    U0327 Software Incompatibility with Vehicle Security Control Module X ○*1 X X
    U1106 Lost Communication with Electric Parking Brake Module X ○*1 X X
    U1133 Lost Communication with PMN Module X ○*1 X X
    Headlight swivel ECU assembly (AFS ECU) U0142 Lost Communication with Body Control Module "B" X ○ X X
    U0126 Lost Communication with Steering Angle Sensor Module X X X X
    U0129 Lost Communication with Brake System Control Module X X X X
    U0101 Lost Communication with TCM X X X ○
    U0100 Lost Communication with ECM/PCM "A" X X X ○
    U0073 Control Module Communication Bus Off - - - -
    Parking brake with bracket actuator assembly (electric parking brake ECU) U0100 Lost Communication with ECM/PCM "A" X X X ○
    U0129 Lost Communication with Brake System Control Module X X X X
    U0073 Control Module Communication Bus OFF X X X ○
    U0124 Lost Communication with Lateral Acceleration Sensor Module X X X X
    Combination meter assembly U0100 Lost Communication with ECM/PCM "A" X X X ○
    U0129 Lost Communication with Brake System Control Module X X X X
    Air conditioning amplifier assembly U0100 Lost Communication with ECM/PCM "A" X X ○*1 ○
    U0142 Lost Communication with Body Control Module "B" X ○ ○*1 X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X ○*1 X
    U0131 Lost Communication with Power Steering Control Module X X ○*1 X
    ECM U0129 Lost Communication with Brake System Control Module X X X ○*1
    Power management control ECU (Power Management1) U0100 Lost Communication with ECM/PCM "A" X X X ○
    U0182 Lost Communication with Lighting Control Module Front - - - -
    U1002 Lost Communication with Gateway Module (V2 Bus) - - - -
    Power management control ECU (Power Management2) U0100 Lost Communication with ECM/PCM "A" - - - -
    U1002 Lost Communication with Gateway Module (Power Management Bus) - - - -
    Brake actuator assembly (VSC ECU) U0073 Control Module Communication Bus OFF X X X ○
    U0100 Lost Communication with ECM/PCM "A" X X X ○
    U0126 Lost Communication with Steering Angle Sensor Module X X X X
    U0123 Lost Communication with Yaw Rate Sensor Module X X X X
    Brake actuator assembly (ABS ECU) U0073 Control Module Communication Bus OFF X X X ○
    Power steering ECU assembly U0100 Lost Communication with ECM/PCM "A" X X X ○
    U0129 Lost Communication with Brake System Control Module X X X X
    Multiplex tilt and telescopic ECU B2621 Communication Interruption X ○ X X
    B2624 Vehicle Speed Malfunction X ○ X X

    Tech Tips


    • ○: Stored.

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

    • -: Not stored.

    • *1: Only stored when communication recovery has occurred. During communication stop, cannot be stored.

    • *2: Only stored when communication with both ECUs is lost.

    • *3: With gateway function.

    Output from Output DTC Detection Item Detected Communication Stop Mode
    V1 Bus
    Power Steering ECU Communication Stop Mode Electric Parking Brake ECU Communication Stop Mode Certification ECU Communication Stop Mode Combination Meter ECU Communication Stop Mode
    Certification ECU U0100 Lost Communication with ECM/PCM "A" X X ○*1 X
    U0142 Lost Communication with Body Control Module "B" X X ○*1 X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X ○*1 ○
    Main body ECU (instrument panel junction block assembly) U1002 Lost Communication with Gateway Module (MS Bus) - - - -
    U0208 Lost Communication with "Seat Control Module A" - - - -
    U1115 Lost Communication with Tilt & Telescopic Module - - - -
    U0100 Lost Communication with ECM/PCM "A" X X X X
    U0101 Lost Communication with TCM X X X X
    U0151 Lost Communication with Restraints Control Module X X X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X ○
    U0327 Software Incompatibility with Vehicle Security Control Module X X ○ X
    U1106 Lost Communication with Electric Parking Brake Module X ○ X X
    U1133 Lost Communication with PMN Module X X X X
    Headlight swivel ECU assembly (AFS ECU) U0142 Lost Communication with Body Control Module "B" X X X X
    U0126 Lost Communication with Steering Angle Sensor Module X X X X
    U0129 Lost Communication with Brake System Control Module X X X X
    U0101 Lost Communication with TCM X X X X
    U0100 Lost Communication with ECM/PCM "A" X X X X
    U0073 Control Module Communication Bus Off - - - -
    Parking brake with bracket actuator assembly (electric parking brake ECU) U0100 Lost Communication with ECM/PCM "A" X ○*1 X X
    U0129 Lost Communication with Brake System Control Module X ○*1 X X
    U0073 Control Module Communication Bus OFF X ○*1 X X
    U0124 Lost Communication with Lateral Acceleration Sensor Module X ○*1 X X
    Combination meter assembly U0100 Lost Communication with ECM/PCM "A" X X X ○*1
    U0129 Lost Communication with Brake System Control Module X X X ○*1
    Air conditioning amplifier assembly U0100 Lost Communication with ECM/PCM "A" X X X X
    U0142 Lost Communication with Body Control Module "B" X X X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X ○
    U0131 Lost Communication with Power Steering Control Module ○ X X X
    ECM U0129 Lost Communication with Brake System Control Module X X X X
    Power management control ECU (Power Management1) U0100 Lost Communication with ECM/PCM "A" X X X X
    U0182 Lost Communication with Lighting Control Module Front - - - -
    U1002 Lost Communication with Gateway Module (V2 Bus) - - - -
    Power management control ECU (Power Management2) U0100 Lost Communication with ECM/PCM "A" - - - -
    U1002 Lost Communication with Gateway Module (Power Management Bus) - - - -
    Brake actuator assembly (VSC ECU) U0073 Control Module Communication Bus OFF X X X X
    U0100 Lost Communication with ECM/PCM "A" X X X X
    U0126 Lost Communication with Yaw Rate Sensor Module X X X X
    U0123 Lost Communication with Steering Angle Sensor Module X X X X
    Brake actuator assembly (ABS ECU) U0073 Control Module Communication Bus OFF X X X X
    Power steering ECU assembly U0100 Lost Communication with ECM/PCM "A" ○*1 X X X
    U0129 Lost Communication with Brake System Control Module ○*1 X X X
    Multiplex tilt and telescopic ECU B2621 Communication Interruption X X X X
    B2624 Vehicle Speed Malfunction X X X ○

    Tech Tips


    • ○: Stored.

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

    • -: Not stored.

    • *1: Only stored when communication recovery has occurred. During communication stop, cannot be stored.

    • *2: Only stored when communication with both ECUs is lost.

    • *3: With gateway function.

    Output from Output DTC Detection Item Detected Communication Stop Mode
    V1 Bus
    Power Management ECU*3 Communication Stop Mode Brake and traction actuator (ABS ECU) Communication Stop Mode Brake and traction actuator (VSC ECU) Communication Stop Mode Steering Angle Sensor Communication Stop Mode Yaw Rate Sensor Communication Stop Mode
    Certification ECU U0100 Lost Communication with ECM/PCM "A" X X X X X
    U0142 Lost Communication with Body Control Module "B" X X X X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X X X
    Main body ECU (instrument panel junction block assembly) U1002 Lost Communication with Gateway Module (MS Bus) - - - - -
    U0208 Lost Communication with "Seat Control Module A" - - - - -
    U1115 Lost Communication with Tilt & Telescopic Module - - - - -
    U0100 Lost Communication with ECM/PCM "A" X X X X X
    U0101 Lost Communication with TCM X X X X X
    U0151 Lost Communication with Restraints Control Module X X X X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X X X
    U0327 Software Incompatibility with Vehicle Security Control Module X X X X X
    U1106 Lost Communication with Electric Parking Brake Module X X X X X
    U1133 Lost Communication with PMN Module ○ X X X X
    Headlight swivel ECU assembly (AFS ECU) U0142 Lost Communication with Body Control Module "B" ○*1 X X X X
    U0126 Lost Communication with Steering Angle Sensor Module ○*1 X X ○ X
    U0129 Lost Communication with Brake System Control Module ○*1 ○ ○ X X
    U0101 Lost Communication with TCM ○*1 X X X X
    U0100 Lost Communication with ECM/PCM "A" ○*1 X X X X
    U0073 Control Module Communication Bus Off ○*1 - - - -
    Parking brake with bracket actuator assembly (electric parking brake ECU) U0100 Lost Communication with ECM/PCM "A" X X X X X
    U0129 Lost Communication with Brake System Control Module X ○ ○ X X
    U0073 Control Module Communication Bus OFF X ○ ○ X ○
    U0124 Lost Communication with Lateral Acceleration Sensor Module X X X X ○
    Combination meter assembly U0100 Lost Communication with ECM/PCM "A" X X X X X
    U0129 Lost Communication with Brake System Control Module X ○ ○ X X
    Air conditioning amplifier assembly U0100 Lost Communication with ECM/PCM "A" X X X X X
    U0142 Lost Communication with Body Control Module "B" X X X X X
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module X X X X X
    U0131 Lost Communication with Power Steering Control Module X X X X X
    ECM U0129 Lost Communication with Brake System Control Module X X ○ X X
    Power management control ECU (Power Management1) U0100 Lost Communication with ECM/PCM "A" ○*1 X X X X
    U0182 Lost Communication with Lighting Control Module Front - - - - -
    U1002 Lost Communication with Gateway Module (V2 Bus) - - - - -
    Power management control ECU (Power Management2) U0100 Lost Communication with ECM/PCM "A" - - - - -
    U1002 Lost Communication with Gateway Module (Power Management Bus) - - - - -
    Brake actuator assembly (VSC ECU) U0073 Control Module Communication Bus OFF X - ○*1 ○ ○
    U0100 Lost Communication with ECM/PCM "A" X - ○*1 X X
    U0126 Lost Communication with Steering Angle Sensor Module X - ○*1 ○ X
    U0123 Lost Communication with Yaw Rate Sensor Module X - ○*1 X ○
    Brake actuator assembly (ABS ECU) U0073 Control Module Communication Bus OFF X ○*1 - X X
    Power steering ECU assembly U0100 Lost Communication with ECM/PCM "A" X X X X X
    U0129 Lost Communication with Brake System Control Module X ○ ○ X X
    Multiplex tilt and telescopic ECU B2621 Communication Interruption X X X X X
    B2624 Vehicle Speed Malfunction X X X X X

    Tech Tips


    • ○: Stored.

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

    • -: Not stored.

    • *1: Only stored when communication recovery has occurred. During communication stop, cannot be stored.

    • *2: Only stored when communication with both ECUs is lost.

    • *3: With gateway function.

    Output from Output DTC Detection Item Detected Communication Stop Mode
    V2 Bus
    AFS ECU Communication Stop Mode Power Management ECU*3 Communication Stop Mode
    Certification ECU U0100 Lost Communication with ECM/PCM "A" - -
    U0142 Lost Communication with Body Control Module "B" - -
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module - -
    Main body ECU (instrument panel junction block assembly) U1002 Lost Communication with Gateway Module (MS Bus) - -
    U0208 Lost Communication with "Seat Control Module A" - -
    U1115 Lost Communication with Tilt & Telescopic Module - -
    U0100 Lost Communication with ECM/PCM "A" - -
    U0101 Lost Communication with TCM - -
    U0151 Lost Communication with Restraints Control Module - -
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module - -
    U0327 Software Incompatibility with Vehicle Security Control Module - -
    U1106 Lost Communication with Electric Parking Brake Module - -
    U1133 Lost Communication with PMN Module - ○
    Headlight swivel ECU assembly (AFS ECU) U0142 Lost Communication with Body Control Module "B" ○*1 ○*1
    U0126 Lost Communication with Steering Angle Sensor Module ○*1 ○*1
    U0129 Lost Communication with Brake System Control Module ○*1 ○*1
    U0101 Lost Communication with TCM ○*1 ○*1
    U0100 Lost Communication with ECM/PCM "A" ○*1 ○*1
    U0073 Control Module Communication Bus Off ○*1 ○*1
    Parking brake with bracket actuator assembly (electric parking brake ECU) U0100 Lost Communication with ECM/PCM "A" - -
    U0129 Lost Communication with Brake System Control Module - -
    U0073 Control Module Communication Bus OFF - -
    U0124 Lost Communication with Lateral Acceleration Sensor Module - -
    Combination meter assembly U0100 Lost Communication with ECM/PCM "A" - -
    U0129 Lost Communication with Brake System Control Module - -
    Air conditioning amplifier assembly U0100 Lost Communication with ECM/PCM "A" - -
    U0142 Lost Communication with Body Control Module "B" - -
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module - -
    U0131 Lost Communication with Power Steering Control Module - -
    ECM U0129 Lost Communication with Brake System Control Module - -
    Power management control ECU (Power Management1) U0100 Lost Communication with ECM/PCM "A" - -
    U0182 Lost Communication with Lighting Control Module Front ○ ○
    U1002 Lost Communication with Gateway Module (V2 Bus) ○*2 ○
    Power management control ECU (Power Management2) U0100 Lost Communication with ECM/PCM "A" - -
    U1002 Lost Communication with Gateway Module (Power Management Bus) - -
    Brake actuator assembly (VSC ECU) U0073 Control Module Communication Bus OFF - -
    U0100 Lost Communication with ECM/PCM "A" - -
    U0126 Lost Communication with Steering Angle Sensor Module - -
    U0123 Lost Communication with Yaw Rate Sensor Module - -
    Brake actuator assembly (ABS ECU) U0073 Control Module Communication Bus OFF - -
    Power steering ECU assembly U0100 Lost Communication with ECM/PCM "A" - -
    U0129 Lost Communication with Brake System Control Module - -
    Multiplex tilt and telescopic ECU B2621 Communication Interruption - -
    B2624 Vehicle Speed Malfunction - -

    Tech Tips


    • ○: Stored.

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

    • -: Not stored.

    • *1: Only stored when communication recovery has occurred. During communication stop, cannot be stored.

    • *2: Only stored when communication with both ECUs is lost.

    • *3: With gateway function.

    Output from Output DTC Detection Item Detected Communication Stop Mode
    MS Bus
    Main Body ECU*3 Communication Stop Mode Position Control ECU and Switch Communication Stop Mode Tilt and Telescopic ECU Communication Stop Mode
    Certification ECU U0100 Lost Communication with ECM/PCM "A" - - -
    U0142 Lost Communication with Body Control Module "B" - - -
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module - - -
    Main body ECU (instrument panel junction block assembly) U1002 Lost Communication with Gateway Module (MS Bus) ○*1 ○ ○
    U0208 Lost Communication with "Seat Control Module A" ○*1 ○ X
    U1115 Lost Communication with Tilt & Telescopic Module ○*1 X ○
    U0100 Lost Communication with ECM/PCM "A" - - -
    U0101 Lost Communication with TCM - - -
    U0151 Lost Communication with Restraints Control Module - - -
    Main body ECU (instrument panel junction block assembly) U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module - - -
    U0327 Software Incompatibility with Vehicle Security Control Module - - -
    U1106 Lost Communication with Electric Parking Brake Module - - -
    U1133 Lost Communication with PMN Module - - -
    Headlight swivel ECU assembly (AFS ECU) U0142 Lost Communication with Body Control Module "B" - - -
    U0126 Lost Communication with Steering Angle Sensor Module - - -
    U0129 Lost Communication with Brake System Control Module - - -
    U0101 Lost Communication with TCM - - -
    U0100 Lost Communication with ECM/PCM "A" - - -
    U0073 Control Module Communication Bus Off - - -
    Parking brake with bracket actuator assembly (electric parking brake ECU) U0100 Lost Communication with ECM/PCM "A" - - -
    U0129 Lost Communication with Brake System Control Module - - -
    U0073 Control Module Communication Bus OFF - - -
    U0124 Lost Communication with Lateral Acceleration Sensor Module - - -
    Combination meter assembly U0100 Lost Communication with ECM/PCM "A" - - -
    U0129 Lost Communication with Brake System Control Module - - -
    Air conditioning amplifier assembly U0100 Lost Communication with ECM/PCM "A" - - -
    U0142 Lost Communication with Body Control Module "B" - - -
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module - - -
    U0131 Lost Communication with Power Steering Control Module - - -
    ECM U0129 Lost Communication with Brake System Control Module - - -
    Power management control ECU (Power Management1) U0100 Lost Communication with ECM/PCM "A" - - -
    U0182 Lost Communication with Lighting Control Module Front - - -
    U1002 Lost Communication with Gateway Module (V2 Bus) - - -
    Power management control ECU (Power Management2) U0100 Lost Communication with ECM/PCM "A" - - -
    U1002 Lost Communication with Gateway Module (Power Management Bus) - - -
    Brake actuator assembly (VSC ECU) U0073 Control Module Communication Bus OFF - - -
    U0100 Lost Communication with ECM/PCM "A" - - -
    U0126 Lost Communication with Steering Angle Sensor Module - - -
    U0123 Lost Communication with Yaw Rate Sensor Module - - -
    Brake actuator assembly (ABS ECU) U0073 Control Module Communication Bus OFF - - -
    Power steering ECU assembly U0100 Lost Communication with ECM/PCM "A" - - -
    U0129 Lost Communication with Brake System Control Module - - -
    Multiplex tilt and telescopic ECU B2621 Communication Interruption ○ ○ ○*1
    B2624 Vehicle Speed Malfunction ○ X ○*1

    Tech Tips


    • ○: Stored.

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

    • -: Not stored.

    • *1: Only stored when communication recovery has occurred. During communication stop, cannot be stored.

    • *2: Only stored when communication with both ECUs is lost.

    • *3: With gateway function.

    Output from Output DTC Detection Item Detected Communication Stop Mode
    Power Management Bus
    ECM Communication Stop Mode Power Management ECU*3 Communication Stop Mode
    Certification ECU U0100 Lost Communication with ECM/PCM "A" - -
    U0142 Lost Communication with Body Control Module "B" - -
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module - -
    Main body ECU (instrument panel junction block assembly) U1002 Lost Communication with Gateway Module (MS Bus) - -
    U0208 Lost Communication with "Seat Control Module A" - -
    U1115 Lost Communication with Tilt & Telescopic Module - -
    U0100 Lost Communication with ECM/PCM "A" - -
    U0101 Lost Communication with TCM - -
    U0151 Lost Communication with Restraints Control Module - -
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module - -
    U0327 Software Incompatibility with Vehicle Security Control Module - -
    U1106 Lost Communication with Electric Parking Brake Module - -
    U1133 Lost Communication with PMN Module - -
    Headlight swivel ECU assembly (AFS ECU) U0142 Lost Communication with Body Control Module "B" - -
    U0126 Lost Communication with Steering Angle Sensor Module - -
    U0129 Lost Communication with Brake System Control Module - -
    U0101 Lost Communication with TCM - -
    U0100 Lost Communication with ECM/PCM "A" - -
    U0073 Control Module Communication Bus Off - -
    Parking brake with bracket actuator assembly (electric parking brake ECU) U0100 Lost Communication with ECM/PCM "A" - -
    U0129 Lost Communication with Brake System Control Module - -
    U0073 Control Module Communication Bus OFF - -
    U0124 Lost Communication with Lateral Acceleration Sensor Module - -
    Combination meter assembly U0100 Lost Communication with ECM/PCM "A" - -
    U0129 Lost Communication with Brake System Control Module - -
    Air conditioning amplifier assembly U0100 Lost Communication with ECM/PCM "A" - -
    U0142 Lost Communication with Body Control Module "B" - -
    U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module - -
    U0131 Lost Communication with Power Steering Control Module - -
    ECM U0129 Lost Communication with Brake System Control Module - -
    Power management control ECU (Power Management1) U0100 Lost Communication with ECM/PCM "A" - -
    U0182 Lost Communication with Lighting Control Module Front - -
    U1002 Lost Communication with Gateway Module (V2 Bus) - -
    Power management control ECU (Power Management2) U0100 Lost Communication with ECM/PCM "A" ○ ○
    U1002 Lost Communication with Gateway Module (Power Management Bus) ○ ○
    Brake actuator assembly (VSC ECU) U0073 Control Module Communication Bus OFF - -
    U0100 Lost Communication with ECM/PCM "A" - -
    U0126 Lost Communication with Yaw Rate Sensor Module - -
    U0123 Lost Communication with Steering Angle Sensor Module - -
    Brake actuator assembly (ABS ECU) U0073 Control Module Communication Bus OFF - -
    Power steering ECU assembly U0100 Lost Communication with ECM/PCM "A" - -
    U0129 Lost Communication with Brake System Control Module - -
    Multiplex tilt and telescopic ECU B2621 Communication Interruption - -
    B2624 Vehicle Speed Malfunction - -

    Tech Tips


    • ○: Stored.

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

    • -: Not stored.

    • *1: Only stored when communication recovery has occurred. During communication stop, cannot be stored.

    • *2: Only stored when communication with both ECUs is lost.

    • *3: With gateway function.