CAN COMMUNICATION SYSTEM DIAGNOSIS SYSTEM


  1. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM


    1. CAN No. 1 Bus


      1. ECM

      2. Main body ECU (driver side junction block assembly)

      3. Combination meter assembly

      4. Power steering ECU assembly

      5. Air conditioning amplifier assembly*3

      6. Center airbag sensor assembly

      7. Skid control ECU (brake actuator assembly)

      8. Steering angle sensor (spiral cable with sensor sub-assembly)

      9. Yaw rate and acceleration sensor

      10. AWD control ECU*1

      11. Certification ECU (smart key ECU assembly)*2

      12. Power management control ECU*2

      13. Navigation receiver assembly*7

      14. Radio and display receiver assembly*8

    2. CAN No. 2 Bus


      1. AFS ECU*4

    3. CAN MS Bus


      1. Main body ECU (driver side junction block assembly)

      2. Power back door ECU (back door motor unit)*5

      3. Back door closer ECU*6

      4. Outer mirror control ECU assembly (for driver side)

      5. Outer mirror control ECU assembly (for front passenger side)

      6. Position control ECU and switch assembly

    4. Power Management Bus*2


      1. Air conditioning amplifier assembly*2

    Tech Tips

    *1: for AWD

    *2: w/ Smart entry and start system

    *3: w/o Smart entry and start system

    *4: w/ Automatic high beam system

    *5: w/ Power back door system

    *6: w/ Back door closer system (w/o Power back door system)

    *7: for Navigation receiver type

    *8: for Radio and display type

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


    1. The systems (ECUs and sensors) that adopt CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed on the vehicle.

      ECU/Sensor Name GTS Display Check Method
      ECM

      • ECM (Engine)

      • TCM

      		 Installed on all vehicles
      Main body ECU (driver side junction block assembly) Main Body Installed on all vehicles
      Combination meter assembly Combination Meter Installed on all vehicles
      Power steering ECU assembly Power Steering (EPS) Installed on all vehicles
      Air conditioning amplifier assembly Air Conditioner Installed on all vehicles
      Center airbag sensor assembly Airbag Installed on all vehicles
      Skid control ECU (brake actuator assembly) Skid Control (ABS/VSC/TRAC) Installed on all vehicles
      Steering angle sensor (spiral cable with sensor sub-assembly) Spiral Cable (Steering Angle Sensor) Installed on all vehicles
      Yaw rate and acceleration sensor Yaw Rate Sensor Installed on all vehicles
      AWD control ECU Four Wheel Drive Control AWD vehicles
      Certification ECU (smart key ECU assembly) Certification (Smart) w/ Smart entry and start system
      Power management control ECU

      • Electric Power Control

      • Power Management1

      • Power Management2

      		 w/ Smart entry and start system
      Power back door ECU (back door motor unit) Back Door w/ Power back door system
      Back door closer ECU Back Door w/ Back door closer system (w/o power back door system)
      AFS ECU Headlight Swivel (AFS) w/ Automatic high beam system
      Navigation receiver assembly Display and Navigation (AVN1) for Navigation receiver type
      Radio and display receiver assembly Display and Navigation (AVN1) for Radio and display type
      Outer mirror control ECU assembly (for driver side)

      Front Door LH / L-Mirror

      (FL-Door 2 / L-Mirror)

      		 Installed on all vehicles
      Outer mirror control ECU assembly (for front passenger side)

      Front Door RH / R-Mirror

      (FR-Door 2 / R-Mirror)

      		 Installed on all vehicles
      Position control ECU and switch assembly D-Seat Installed on all vehicles

  3. CAN BUS CHECK

    Tech Tips

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


    1. Using the GTS, select "CAN Bus Check" from "System Select".

  4. DTC TABLE BY ECU

    Tech Tips


    • In the CAN communication system, CAN communication system DTCs can be displayed by the ECU using the GTS.

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


    1. ECM / GTS Display "Engine"

      DTC Code Detection Item
      U0101*1 Lost Communication with TCM

      Tech Tips


      • DTC communication uses the CAN communication system.

      • *1: The ECM is malfunctioning if only U0101 is output. Refer to SFI System Click here.

    2. TCM / GTS Display "ECT"

      DTC Code Detection Item
      U0100*2 Lost Communication with ECM / PCM "A"

      Tech Tips


      • DTC communication uses the CAN communication system.

      • *2: The ECM is malfunctioning if only U0100 is output. Refer to Automatic Transaxle System (U760E: Click here, U760F: Click here.

    3. Main Body ECU (Driver Side Junction Block Assembly) / GTS Display "Main Body"

      DTC Code Detection Item
      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
      U0164 Lost Communication with HVAC Control Module
      U0182 Lost Communication with AFS
      U0199 Lost Communication with "Door Control Module A"
      U0200 Lost Communication with "Door Control Module B"
      U0208 Lost Communication with "Seat Control Module A"
      U0230 Lost Communication with Rear Gate Module
      U0327 Software Incompatibility with Vehicle Security
      U1002 Lost Communication with Gateway Module (Main body ECU)
      U1133 Lost Communication with PMN Module

      Tech Tips

      DTC communication uses the CAN communication system.

    4. Power Steering ECU Assembly / GTS Display "EMPS"

      DTC Code Detection Item
      U0100 Lost Communication with ECM / PCM "A"
      U0129 Lost Communication with Brake System Control Module

      Tech Tips

      DTC communication uses the CAN communication system.

    5. Air Conditioning Amplifier Assembly / GTS Display "Air Conditioner"

      DTC Code Detection Item
      U0100 Lost Communication with ECM
      U0131 Lost Communication with Electric Power Steering ECU
      U0142 Lost Communication with Main body ECU
      U0155 Lost Communication with Meter

      Tech Tips

      DTC communication uses the CAN communication system.

    6. Combination Meter Assembly / GTS Display "Combination Meter"

      DTC Code Detection Item
      U0100 Lost Communication with ECM / PCM "A"
      U0129 Lost Communication with Brake System Control Module

      Tech Tips

      DTC communication uses the CAN communication system.

    7. Center Airbag Sensor Assembly / GTS Display "SRS Airbag"

      Tech Tips

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

    8. Skid Control ECU (Brake Actuator Assembly) / GTS Display "ABS/VSC/TRC"

      DTC Code Detection Item
      U0073 Control Module Communication Bus OFF
      U0100 Lost Communication with ECM / PCM
      U0123 Lost Communication with Yaw Rate Sensor Module
      U0124 Lost Communication with Lateral Acceleration Sensor Module
      U0126 Lost Communication with Steering Angle Sensor Module

      Tech Tips

      DTC communication uses the CAN communication system.

    9. Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly) / GTS Display "Spiral Cable (Steering Angle Sensor)"

      Tech Tips

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

    10. Yaw Rate and Acceleration Sensor / GTS Display "Yaw Rate Sensor"

      Tech Tips

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

    11. AWD Control ECU / GTS Display "Four Wheel Drive Control"

      DTC Code Detection Item
      U0073 Control Module Communication Bus OFF
      U0100 Lost Communication with ECM / PCM
      U0123 Lost Communication with Yaw Rate Sensor Module
      U0124 Lost Communication with Lateral Acceleration Sensor Module
      U0126 Lost Communication with Steering Angle Sensor Module
      U0129 Lost Communication with Brake System Control Module

      Tech Tips

      DTC communication uses the CAN communication system.

    12. Certification ECU (Smart Key ECU Assembly) / GTS Display "Entry & Start"

      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

      Tech Tips

      DTC communication uses the CAN communication system.

    13. Power Management Control ECU / GTS Display "Electric Power Control"

      DTC Code Detection Item
      U0100 Lost Communication with ECM / PCM

      Tech Tips


      • DTC communication uses the CAN communication system.

      • "Electric Power Control" DTC output indicates a communication error in the CAN No. 1 bus.

    14. Power Management Control ECU / GTS Display "PM1 Gateway"

      DTC Code Detection Item
      U0182 Lost Communication with AFS ECU
      U1002 Lost Communication with Gateway Module

      Tech Tips


      • DTC communication uses the CAN communication system.

      • "PM1 Gateway" DTC output indicates a communication error in the CAN No. 2 bus.

    15. Power Management Control ECU / GTS Display "PM2 Gateway"

      DTC Code Detection Item
      U0100 Lost Communication with ECM / PCM
      U0164 Lost Communication with HVAC Control Module
      U1002 Lost Communication with Gateway Module

      Tech Tips


      • DTC communication uses the CAN communication system.

      • "PM2 Gateway" DTC output indicates a communication error in the power management bus.

    16. Power Back Door ECU (Back Door Motor Unit) / GTS Display "Power Back Door"

      Tech Tips

      The back door motor unit (power back door ECU) is connected to the CAN communication system, but CAN communication DTCs are not output.

    17. Back Door Closer ECU / GTS Display "Power Back Door"

      Tech Tips

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

    18. AFS ECU / GTS Display "AFS/HL AutoLeveling"

      Tech Tips

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

    19. Navigation Receiver Assembly / GTS Display "Navigation System"

      DTC Code Detection Item
      U0073 Sending Malfunction (Navigation to APGS)
      U0100 Lost Communication with ECM
      U0129 Lost Communication with Brake System Control Module
      U0140 Lost Communication with Body Control Module
      U0155 Meter ECU Communication

      Tech Tips


      • DTC communication uses the CAN communication system.

      • "Navigation System" DTC output indicates a communication error in the CAN No. 1 bus.

    20. Radio and Display Receiver Assembly / GTS Display "Navigation System"

      DTC Code Detection Item
      U0073 Sending Malfunction (Navigation to APGS)
      U0100 Lost Communication with ECM
      U0129 Lost Communication with Brake System Control Module
      U0140 Lost Communication with Body Control Module
      U0155 Meter ECU Communication

      Tech Tips


      • DTC communication uses the CAN communication system.

      • "Navigation System" DTC output indicates a communication error in the CAN No. 1 bus.

    21. Outer Mirror Control ECU Assembly (for Driver Side) / GTS Display "Mirror L"

      DTC Code Detection Item
      U0142 Lost Communication with Body Control Module "B"

      Tech Tips


      • DTC communication uses the CAN communication system.

      • "Mirror L" DTC output indicates a communication error in the CAN MS bus.

    22. Outer Mirror Control ECU Assembly (for Front Passenger Side) / GTS Display "Mirror R"

      DTC Code Detection Item
      U0142 Lost Communication with Body Control Module "B"

      Tech Tips


      • DTC communication uses the CAN communication system.

      • "Mirror R" DTC output indicates a communication error in the CAN MS bus.

    23. Position Control ECU and Switch Assembly / GTS Display "Driver Seat"

      Tech Tips

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

  5. DTC COMBINATION TABLE


    1. CAN No. 1 Bus

      DTC Trouble Mode
      Output ECU Output DTC Main Body ECU Communication Stop Mode Combination Meter ECU Communication Stop Mode Air Conditioning Amplifier Communication Stop Mode
      Combination meter assembly U0100 X ○*1 X
      U0129 X ○*1 X
      Air conditioning amplifier assembly U0100 X X ○*3
      U0131 X X ○*3
      U0142 ○ X ○*3
      U0155 X ○ ○*3
      Skid control ECU (brake actuator assembly) U0073 X X X
      U0100 X X X
      U0123 X X X
      U0124 X X X
      U0126 X X X
      Power steering ECU assembly U0100 X X X
      U0129 X X X
      AWD control ECU U0073 X X X
      U0100 X X X
      U0123 X X X
      U0124 X X X
      U0126 X X X
      U0129 X X X
      Power management control ECU U0100 X X X
      Main body ECU (driver side junction block assembly) U0100 X X X
      U0101 X X X
      U0151 X X X
      U0155 X ○ X
      U0164 X X ○
      U0327 X X X
      U1133 X X X
      Certification ECU (smart key ECU assembly) U0100 X X X
      U0142 ○ X X
      U0155 X ○ X
      Navigation receiver assembly U0073 X X X
      U0100 X X X
      U0129 X X X
      U0140 ○ X X
      U0155 X ○ X
      Radio and display receiver assembly U0073 X X X
      U0100 X X X
      U0129 X X X
      U0140 ○ X X
      U0155 X ○ X
      DTC Trouble Mode
      Output ECU Output DTC Center Airbag Sensor Communication Stop Mode ECM Communication Stop Mode 4WD Control ECU Communication Stop Mode
      Combination meter assembly U0100 X ○ X
      U0129 X X X
      Air conditioning amplifier assembly U0100 X ○ X
      U0131 X X X
      U0142 X X X
      U0155 X X X
      Skid control ECU (brake actuator assembly) U0073 X X X
      U0100 X ○ X
      U0123 X X X
      U0124 X X X
      U0126 X X X
      Power steering ECU assembly U0100 X ○ X
      U0129 X X X
      AWD control ECU U0073 X X ○*1
      U0100 X ○ ○*1
      U0123 X X ○*1
      U0124 X X ○*1
      U0126 X X ○*1
      U0129 X X ○*1
      Power management control ECU U0100 X ○ X
      Main body ECU (driver side junction block assembly) U0100 X ○ X
      U0101 X ○ X
      U0151 ○ X X
      U0155 X X X
      U0164 X X X
      U0327 X X X
      U1133 X X X
      Certification ECU (smart key ECU assembly) U0100 X ○ X
      U0142 X X X
      U0155 X X X
      Navigation receiver assembly U0073 X X X
      U0100 X ○ X
      U0129 X X X
      U0140 X X X
      U0155 X X X
      Radio and display receiver assembly U0073 X X X
      U0100 X ○ X
      U0129 X X X
      U0140 X X X
      U0155 X X X
      DTC Trouble Mode
      Output ECU Output DTC Skid Control ECU Communication Stop Mode Yaw Rate Sensor Communication Stop Mode Steering Angle Sensor Communication Stop Mode Power Steering ECU Communication Stop Mode
      Combination meter assembly U0100 X X X X
      U0129 ○ X X X
      Air conditioning amplifier assembly U0100 X X X X
      U0131 X X X ○
      U0142 X X X X
      U0155 X X X X
      Skid control ECU (brake actuator assembly) U0073 ○*1, 4 X X X
      U0100 ○*1 X X X
      U0123 ○*1 ○ X X
      U0124 ○*1 ○ X X
      U0126 ○*1 X ○ X
      Power steering ECU assembly U0100 X X X ○*1
      U0129 ○ X X ○*1
      AWD control ECU U0073 X X X X
      U0100 X X X X
      U0123 X ○ X X
      U0124 X ○ X X
      U0126 X X ○ X
      U0129 ○ X X X
      Power management control ECU U0100 X X X X
      Main body ECU (driver side junction block assembly) U0100 X X X X
      U0101 X X X X
      U0151 X X X X
      U0155 X X X X
      U0164 X X X X
      U0327 X X X X
      U1133 X X X X
      Certification ECU (smart key ECU assembly) U0100 X X X X
      U0142 X X X X
      U0155 X X X X
      Navigation receiver assembly U0073 X X X X
      U0100 X X X X
      U0129 ○ X X X
      U0140 X X X X
      U0155 X X X X
      Radio and display receiver assembly U0073 X X X X
      U0100 X X X X
      U0129 ○ X X X
      U0140 X X X X
      U0155 X X X X
      DTC Trouble Mode
      Output ECU Output DTC Certification ECU Communication Stop Mode Power Management Control ECU Communication Stop Mode Navigation Receiver Assembly Communication Stop Mode Audio Receiver Assembly Communication Stop Mode
      Combination meter assembly U0100 X X X X
      U0129 X X X X
      Air conditioning amplifier assembly U0100 X X X X
      U0131 X X X X
      U0142 X X X X
      U0155 X X X X
      Skid control ECU (brake actuator assembly) 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
      Power steering ECU assembly U0100 X X X X
      U0129 X X X X
      AWD 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
      U0129 X X X X
      Power management control ECU U0100 X ○*1 X X
      Main body ECU (driver side junction block assembly) U0100 X X X X
      U0101 X X X X
      U0151 X X X X
      U0155 X X X X
      U0164 X X X X
      U0327 ○ X X X
      U1133 X ○ X X
      Certification ECU (smart key ECU assembly) U0100 X X X X
      U0142 X X X X
      U0155 X X X X
      Navigation receiver assembly U0073 X X ○*1 -
      U0100 X X ○*1 -
      U0129 X X ○*1 -
      U0140 X X ○*1 -
      U0155 X X ○*1 -
      Radio and display receiver assembly U0073 X X - ○*1
      U0100 X X - ○*1
      U0129 X X - ○*1
      U0140 X X - ○*1
      U0155 X X - ○*1

      Tech Tips


      • ○: Set

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

      • -: DTC is not output.

      • *1: DTC is not output during communication error, but will be output as a history DTC (past DTC) when communication returns to normal.

      • *2: DTC is stored only when both communications are simultaneously interrupted.

      • *3: DTC is not output during communication error.

      • *4: DTC U0100, U0123, U0124 or U0126 are not stored when DTC U0073 has already been stored.

      • Skid Control ECU Communication Stop Mode Click here

      • Air Conditioning Amplifier Communication Stop Mode Click here

      • Power Steering 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

      • Main Body ECU Communication Stop Mode Click here

      • Combination Meter ECU Communication Stop Mode Click here

      • Center Airbag Sensor Communication Stop Mode Click here

      • 4WD Control ECU Communication Stop Mode Click here

      • Certification ECU Communication Stop Mode Click here

      • Power Management Control ECU Communication Stop Mode Click here

      • Navigation Receiver Assembly Communication Stop Mode Click here

      • Audio Receiver Assembly Communication Stop Mode Click here