CAN COMMUNICATION SYSTEM DIAGNOSIS SYSTEM


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


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

      Connected to Code ECU/Sensor Name GTS Display Applicability
      - CGW Central Gateway ECU (Network Gateway ECU)

      • CAN Gateway1

      • CAN Gateway2

      		 Installed on all vehicles
      V Bus DLC3 DLC3 - Installed on all vehicles
      Bus 2 MET Combination Meter Assembly Combination Meter Installed on all vehicles
      PMN Power Management Control ECU Power Management Installed on all vehicles
      PCN Transmission Control ECU Assembly Transmission Control Installed on all vehicles
      EPS Power Steering ECU Assembly Power Steering (EPS) Installed on all vehicles
      SMT Certification ECU (Smart Key ECU Assembly) Certification (Smart) Installed on all vehicles
      YGS Yaw Rate and Acceleration Sensor Yaw Rate Sensor Installed on all vehicles
      STR Steering Angle Sensor (Spiral Cable with Sensor Sub-assembly) Spiral cable (Steering Angle Sensor) Installed on all vehicles
      SRS Airbag Sensor Assembly Airbag Installed on all vehicles
      BRK Skid Control ECU (Brake Booster with Master Cylinder Assembly) Skid Control (ABS/VSC/TRAC) Installed on all vehicles
      MB Main Body ECU (Multiplex Network Body ECU) Main Body Installed on all vehicles
      ENG ECM ECM (Engine) Installed on all vehicles
      Bus 3 AV Radio Receiver Assembly Display and Navigation (AVN) Vehicles with Navigation Receiver Type
      Vehicles with Radio and Display Type
      DCM DCM (Telematics Transceiver) DCM Vehicles with Manual (SOS) Switch
      Bus 5 DS Driving Support ECU Assembly Driving Support (Cruise Control-ACC) Vehicles with Lexus Safety System +
      F-CAM Forward Recognition Camera Front Camera Module Vehicles with Lexus Safety System +
      F-MR Millimeter Wave Radar Sensor Assembly Front Radar Vehicles with Lexus Safety System +
      CS Clearance Warning ECU Assembly Clearance Warning (Clearance Sonar) Vehicles with LEXUS Parking Assist-sensor System
      CAA Rear Television Camera Assembly Parking Assist Monitor System Vehicles with Parking Assist Monitor System (w/o Parallel Parking Assist Function)
      PMN Power Management Control ECU Power Management Installed on all vehicles
      Sub Bus 1 MB Main Body ECU (Multiplex Network Body ECU) - Vehicles with Seat Position Memory
      MIR-L Outer Mirror Control ECU Assembly (Driver Side) Front Door LH/L-Mirror (FL-Door2/L-Mirror) Vehicles with Seat Position Memory
      MIR-R Outer Mirror Control ECU Assembly (Front Passenger Side) Front Door RH/R-Mirror (FR-Door2/R-Mirror) Vehicles with Seat Position Memory
      DST Position Control ECU and Switch Assembly D-Seat Vehicles with Seat Position Memory
      Sub Bus 12 PMN Power Management Control ECU - Installed on all vehicles
      A/C Air Conditioning Amplifier Assembly Air Conditioning Amplifier Installed on all vehicles
      BRK Skid Control ECU (Brake Booster with Master Cylinder Assembly) Skid Control (ABS/VSC/TRAC) Installed on all vehicles
      ENG ECM ECM (Engine) Installed on all vehicles

      Tech Tips

      The names of ECUs and sensors shown on the GTS display may differ from those shown in the DTC Table by ECU section that follows.

  2. 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 the CAN Bus Check screen.

      Note


      • It may be possible to select buses that do not have ECUs or sensors from the bus selection pull-down menu. This is not a malfunction. (This occurs when optional devices are not on a sub bus that is monitored by a gateway function equipped ECU.)

      • In the bus selection pull down menu, all buses applicable to the model are displayed (e.g. LIN communication buses are also displayed). Therefore, refer to the wiring diagrams to check the names of sub buses for CAN communication.

        Click here

      Tech Tips

      Different connection statuses are indicated by the background color of ECUs and sensors that are displayed.

      Explanation of CAN Bus Check Screen
      Bus Type Background Color Connection Status
      Bus White Communication has been normal.
      Yellow Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
      Red

      Currently not communicating (either of the following):


      • Not communicating since the start of the CAN bus check

      • Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
      Not displayed

      Either of the following:


      • The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS.*4

      • No ECUs or sensors are connected to the bus.*5
      Sub bus with a gateway function equipped ECU that does not memorize connected ECUs or sensors*2 White Communication has been normal since the start of the CAN bus check.
      Yellow Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
      Red Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
      Not displayed Communication stop has continued since the start of the CAN bus check.*1
      Sub bus with a gateway function equipped ECU that memorizes connected ECUs and sensors*3 White Communication has been normal.
      Yellow Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
      Red

      Currently not communicating (either of the following):


      • Not communicating since the start of the CAN bus check

      • Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
      Not displayed

      Either of the following:


      • The gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU).*6

      • No ECUs or sensors are connected to the sub bus.*7

      • Gateway function equipped ECUs relay signals between ECUs and sensors connected to different buses.

      • *1: An ECU or sensor is installed to the vehicle but is not displayed on the "Communication Bus Check" screen.

      • *2: The gateway function equipped ECU does not memorize ECUs and sensors connected to its respective sub bus.

      • *3: The gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus.

      • *4: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS, the name of buses, sub buses, ECUs and sensors will not be displayed.

      • *5: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.

      • *6: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.

      • *7: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.

      • If there is no communication between the GTS and the vehicle, or no ECUs or sensors are displayed as connected, check the central gateway ECU (network gateway ECU) and V bus (the bus that connects the DLC3 to the central gateway ECU (network gateway ECU)) for malfunctions.

    2. Observe the connection response screen for approximately 2 minutes to check for a change in connection status of the connected ECUs and sensors.

      Tech Tips


      • If an open occurs in one of the lines of a CAN branch (except DLC3), output from the other branch line (the line that is not open) will be unstable and it may interfere with the response (display) of other ECUs and sensors.

      • If the connection status changes during the inspection, repair the open in the branch line of the ECU or sensor that does not respond (is not detected) and then perform the CAN bus check again.

  3. HOW TO INTERPRET CAN BUS CHECK SCREEN


    1. When a communication stop is currently occurring, the probable malfunctioning part can be determined from the CAN bus check and by using the following methods.

      Note

      The following CAN bus wiring diagram is provided only as an example. This wiring diagram is different from the actual wiring diagram for this vehicle.

      Tech Tips


      • When a communication stop is currently occurring, it is easier to determine the probable malfunctioning part from the CAN bus check rather than from communication DTCs.

      • Wait for approximately 2 minutes after turning the power switch on (IG) (or simulate the driving conditions that enable the malfunction to be reproduced) and select "CAN Bus Check". Then observe the communication status of each ECU on the screen.

    2. If a communication error of only 1 ECU or sensor is indicated on the CAN Bus Check screen, a communication stop of the ECU or sensor is suspected.

      Open in both CAN branch lines of HV on the bus 4

      B001M4KC01
      *a Bus 2 *b Bus 4
      *c Sub Bus *d V Bus
      *e Location of Malfunction *f Background color is red

      Tech Tips

      When there are communication stops, ECUs that are present in the vehicle may not be displayed on the CAN Bus Check screen.

    3. If communication errors for multiple ECUs or sensors are indicated on the CAN Bus Check screen, then a communication stop of the ECU or sensor that shows a more serious communication stop (an ECU or sensor whose background color is red) is suspected.

      Example: Open in a CAN branch line for HV on the bus 4

      B001LOKC01
      *a Background color is red *b Background color intermittently becomes yellow or red
      *c Not displayed or background color is yellow or red - -
      Explanation of CAN Bus Check Screen
      Bus Type Background Color Connection Status
      Bus White Communication has been normal.
      Yellow Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
      Red

      Currently not communicating (either of the following):


      • Not communicating since the start of the CAN bus check

      • Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
      Not displayed

      Either of the following:


      • The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS.*4

      • No ECUs or sensors are connected to the bus.*5
      Sub bus with a gateway function equipped ECU that does not memorize connected ECUs or sensors*2 White Communication has been normal since the start of the CAN bus check.
      Yellow Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
      Red Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
      Not displayed Communication stop has continued since the start of the CAN bus check.*1
      Sub bus with a gateway function equipped ECU that memorizes connected ECUs and sensors*3 White Communication has been normal.
      Yellow Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
      Red

      Currently not communicating (either of the following):


      • Not communicating since the start of the CAN bus check

      • Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
      Not displayed

      Either of the following:


      • The gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU).*6

      • No ECUs or sensors are connected to the sub bus.*7

      • Gateway function equipped ECUs relay signals between ECUs and sensors connected to different buses.

      • *1: An ECU or sensor is installed to the vehicle but is not displayed on the "Communication Bus Check" screen.

      • *2: The gateway function equipped ECU does not memorize ECUs and sensors connected to its respective sub bus.

      • *3: The gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus.

      • *4: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS, the name of buses, sub buses, ECUs and sensors will not be displayed.

      • *5: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.

      • *6: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.

      • *7: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.

      • The example of the CAN Bus Check screen in the illustration shows the result of electrical noise on the CAN bus which is caused by an open in a CAN branch line of HV is also unstable. In addition, in this example, MB is equipped with a gateway function. Therefore, communication is also unstable between the Sub bus ECUs of MB and the bus 4.

      • The example in the illustration shows that HV has a red background color on the CAN Bus Check screen. This indicates a more significant communication stop. In this case, a communication stop of HV is suspected.

    4. If a communication error is indicated on both the bus 4 and Sub bus on the CAN Bus Check screen, suspect any communication stop displayed for the bus 4 first.

      Example: Open in both CAN branch lines of MB on the bus 4

      B001LSCC01
      *a Background color is red *b Not displayed

      Tech Tips


      • In the CAN bus check, it is possible to confirm the communication status of ECUs connected to the bus after connecting the GTS to the DLC3. As for sub bus, it is possible to confirm which sub bus connected ECUs can communicate with a gateway function equipped ECU on the bus.

      • If a gateway function equipped ECU has a communication error, ECUs connected to the gateway function equipped ECU are also affected, and communication stops will be indicated.

      • The CAN Bus Check screen in the illustration shows that MB has a gateway function and a communication stop in MB is suspected.

    5. If the CAN Bus Check screen indicates a communication stop only in the sub bus, a communication stop in the sub bus is suspected.

      Example: Open in both CAN branch lines of MIR-R on the sub bus

      B001N83C01
      *a Background color is red - -

      Tech Tips


      • A communication error in a sub bus does not affect the other buses.

      • When a gateway function equipped ECU has memorized the ECUs that are connected to the sub bus, if any of the ECUs connected to the gateway function equipped ECU has a communication error, the background color changes to yellow or red. (The displayed name will not disappear.)

    6. If both of the bus 2 main bus lines are open, ECUs or sensors that are located farther away from the central gateway ECU (network gateway ECU) than the open part will be displayed as a communication stop on the CAN Bus Check screen.

      (In this case, HVB, R-MGC and ENG background color changes to red.)

      B001KPGC01
      *a Bus 2 *b Bus 4
      *c Sub Bus *d V Bus
      *e Location of Malfunction *f Background color is red

      Tech Tips

      If a communication error occurs in an ECU, it is not displayed on the CAN Bus Check screen even though the ECU is present.

    7. If both of the sub bus main bus lines are open, ECUs that are located farther away from the gateway function equipped ECU than the open part will be displayed as a communication stop on the CAN Bus Check screen.

      (In this case, MIR-L background color changes to red.)

      B001LTAC01
      *a Bus 2 *b Bus 4
      *c Sub Bus *d V Bus
      *e Location of Malfunction *f Background color is red

    8. When any of the following malfunctions occur, CAN communication cannot be established and almost all ECUs and sensors on the bus show a communication error on the CAN Bus Check screen.

      Details of Malfunction
      Short between CAN lines (CANH and CANL)
      Short between a CAN line (CANH or CANL) and +B
      Short between a CAN line (CANH or CANL) and ground
      Open in a CAN main bus line
      B001MJKC01
      *a When any of the following malfunctions occur on the bus 4 *b When any of the following malfunctions occur on a sub bus
      *c Background color is red *d Not displayed

      Tech Tips


      • When a malfunction occurs in the bus, almost all ECUs and sensors on the bus and sub bus indicate a communication error (almost all ECUs are not displayed). As communication with the gateway function equipped ECU that is connected to the bus stops, communication from the ECUs connected to the sub bus that is monitored by the gateway function equipped ECU also stops (these ECUs are not displayed).

      • When a malfunction occurs in a sub bus, almost all ECUs connected to the sub bus indicate a communication error.

      • A communication error in a sub bus does not affect the other buses.

      • The malfunctioning part can be determined by checking for a short circuit between CAN bus lines or between a CAN bus line and ground or +B short using an electrical tester.

    9. If a communication error of all ECUs and sensors is indicated on the CAN Bus Check screen, a communication stop of the V bus (DLC3 - central gateway ECU (network gateway ECU)) is suspected.

      Open in both CAN branch lines in the V bus

      B001M6LC01
      *a Bus 2 *b Bus 4
      *c Sub Bus *d V Bus
      *e Location of Malfunction *f Not displayed

      Tech Tips

      When there is no communication between the GTS and the vehicle, no ECUs or sensors will be displayed.

  4. DTC TABLE BY ECU

    Tech Tips


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

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

    • If there is a malfunction currently, DTCs can be checked by performing steps in the DTC check procedure.


    1. Power Management Control ECU / GTS Display "Hybrid Control"

      DTC Code Detection Item
      U0100-211 Lost Communication with ECM/PCM "A"
      U0100-212 Lost Communication with ECM/PCM "A"
      U0100-530 Lost Communication with ECM/PCM "A"
      U0104-728*4 Lost Communication with Cruise Control Module
      U0110-159*1 Lost Communication with Driver Motor Control Module
      U0110-160*2 Lost Communication with Driver Motor Control Module
      U0110-656*1 Lost Communication with Driver Motor Control Module
      U0110-657*1 Lost Communication with Driver Motor Control Module
      U0129-220 Lost Communication with Brake System Control Module
      U0129-222 Lost Communication with Brake System Control Module
      U0129-527 Lost Communication with Brake System Control Module
      U0129-528 Lost Communication with Brake System Control Module
      U0140-146 Lost Communication with Body Control Module
      U0151-763 Lost Communication with Airbag ECU
      U0164-594 Lost Communication with A/C ECU
      U0164-827 Lost Communication with A/C ECU
      U0424-537*3 Invalid Data Received from HVAC Control Module
      U1107-436 Lost Communication with Power Management Module

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • *1: Refer to Hybrid Control System Click here.

      • *2: Refer to Hybrid Control System Click here.

      • *3: Refer to Hybrid Control System Click here.

      • *4: Dynamic radar cruise control system DTC.

    2. Power Management Control ECU / GTS Display "Power Source Control"

      DTC Code Detection Item
      U0129 Vehicle Speed Signal Communication
      U0293* HV ECU Communication

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Entry and Start System Click here.

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

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM
      U0129 Lost Communication with Brake System Control Module
      U0164 Lost Communication with A/C ECU
      U1002 Lost Communication with Gateway Module (Power Management2)

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • "PM2 Gateway" stores DTCs when a communication error is detected in the sub bus 12.

    4. Power Management Control ECU / GTS Display "Cruise Control"

      DTC Code Detection Item
      U0122 Lost Communication with Vehicle Dynamic Control Module

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    5. ECM / GTS Display "Engine and ECT"

      DTC Code Detection Item
      U0293 Lost Communication with HV ECU

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    6. Transmission Control ECU Assembly / GTS Display "ECT"

      DTC Code Detection Item
      U0146 Lost Communication with Body ECU

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

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

      DTC Code Detection Item
      U0129 Lost Communication with Brake System Control Module
      U0293 Lost Communication with HV ECU
      U023A Lost Communication with Front Camera Module

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    8. Skid Control ECU (Brake Booster with Master Cylinder Assembly) / GTS Display "ABS/VSC/TRC"

      DTC Code Detection Item
      U0073 Control Module Communication Bus OFF
      U0120 Lost Communication with Starter / Generator Control Module
      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 Communication Error from HV ECU

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

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

      Tech Tips

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

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

      Tech Tips

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

    11. Airbag Sensor Assembly / GTS Display "-"

      Tech Tips

      The airbag sensor assembly is connected to the CAN communication system, but the airbag sensor assembly does not store or output CAN communication DTCs.

    12. Main Body ECU (Multiplex Network Body ECU) / 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
      U0163 Lost Communication with Navigation Control Module
      U0164 Lost Communication with HVAC Control Module
      U0198 Lost Communication with Telematic Control Module
      U0199 Lost Communication with "Door Control Module A"
      U0200 Lost Communication with "Door Control Module B"
      U0208 Lost Communication with "Seat Control Module A"
      U023A Lost Communication With Image Processing Module "A"
      U0293 Lost Communication with Hybrid Powertrain Control Module
      U0327 Software Incompatibility with Vehicle Security
      U1002 Lost Communication with Gateway Module (Main body)
      U1133 Lost Communication with PMN Module

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    13. 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
      U0293 Lost Communication with HV ECU

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    14. 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 Combination Meter
      U0293 Lost Communication with HV ECU

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

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

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0103 Lost Communication with Gear Shift Module "A"
      U0129 Lost Communication with Skid Control ECU
      U0131 Lost Communication with Power Steering Control Module
      U0142 Lost Communication with Main Body ECU
      U0151 Lost Communication with Airbag ECU
      U0163 Lost Communication With Navigation Control Module
      U023A Lost Communication with Front Camera Module
      U1104 Lost Communication with Driving Support ECU

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    16. Radio Receiver Assembly (for Navigation Receiver Type) / GTS Display "Navigation System"

      DTC Code Detection Item
      U0073 Sending Malfunction (Navigation to APGS)
      U0100 Engine ECU Communication
      U0126 Steering Sensor Communication
      U0129 VSC (ECB) ECU Communication
      U0140 Lost Communication with Body Control Module
      U0142 Lost Communication with Body Control Module "B"
      U0155 Meter ECU Communication
      U0163 Lost Communication with Navigation Control Module
      U0164 Air Conditioner ECU Communication
      U0198 Lost Communication with Telematic Control Module
      U0293 HV ECU Communication
      U1110 Clearance Sonar ECU Communication

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    17. Radio Receiver Assembly (for Radio and Display Type) / GTS Display "Navigation System"

      DTC Code Detection Item
      U0073 Sending Malfunction (Navigation to APGS)
      U0100 Lost Communication with ECM
      U0140 Lost Communication with Body Control Module
      U0155 Meter ECU Communication
      U0164 Air Conditioner ECU Communication
      U0293 HV ECU Communication
      U1110 Clearance Sonar ECU Communication

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    18. Driving Support ECU Assembly / GTS Display "Pre-Collision 2"

      DTC Code Detection Item
      U0125 Lost Communication with Yaw Rate Sensor Module
      U0126 Lost Communication with Steering Angle Sensor Module
      U0129 Lost Communication with Brake System Control Module
      U0235* Lost Communication with Cruise Control Front Distance Range Sensor
      U023A* Lost Communication with Image Processing Module "A"
      U0293 Lost Communication with Hybrid Vehicle Control System
      U1002* Lost Communication with Gateway Module
      U1104* Lost Communication with Driving Support ECU

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Pre-collision System.

        Click here

    19. Power Management Control ECU / GTS Display "Radar Cruise 1"

      DTC Code Detection Item
      U0104 Lost Communication with Cruise Control Module
      U0122 Lost Communication with Vehicle Dynamics Control Module
      U0293 Lost Communication with Hybrid Vehicle Control System

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    20. Driving Support ECU Assembly / GTS Display "Radar Cruise 2"

      DTC Code Detection Item
      U0125 Lost Communication with Yaw Rate Sensor Module
      U0126 Lost Communication with Steering Angle Sensor Module
      U0129 Lost Communication with Brake System Control Module
      U0235* Lost Communication with Cruise Control Front Distance Range Sensor
      U0293 Lost Communication with Hybrid Vehicle Control System
      U1104* Lost Communication with Driving Support ECU

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Dynamic Radar Cruise Control System.

        Click here

    21. Clearance Warning ECU Assembly / GTS Display "Clearance Sonar"

      DTC Code Detection Item
      U0101* Lost Communication with TCM
      U0155 Lost Communication with Instrument Panel Cluster Control Module (Combination Meter)

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • *: Shift state signal cannot be received from power management control ECU.

    22. Position Control ECU and Switch Assembly / GTS Display "-"

      Tech Tips

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

    23. Outer Mirror Control ECU Assembly (Driver Side) / GTS Display "Mirror L" (for LHD), "Mirror R" (for RHD)

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

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    24. Outer Mirror Control ECU Assembly (Front Passenger Side) / GTS Display "Mirror R" (for LHD), "Mirror L" (for RHD)

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

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

    25. Rear Television Camera Assembly / GTS Display "IPA/Parking Assist Monitor"

      DTC Code Detection Item
      U0100 Lost Communication with ECM/PCM "A"
      U0126 Lost Communication with Steering Angle Sensor Module
      U0129 Lost Communication with Brake System Control Module
      U0140 Lost Communication with Body Control Module
      U0163 Lost Communication with Navigation Control Module
      U0293 Lost Communication with HV ECU
      U1000* CAN Communication Failure (Message Registry)
      U1110 Lost Communication with Intuitive Parking Assist Module

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • *: The rear television camera assembly stores this DTC if an internal error related to the CAN communication system is detected Click here.

    26. DCM (Telematics Transceiver) / GTS Display "-"

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • The DCM (telematics transceiver) informs the radio receiver assembly of output DTCs through the USB communication line.

    27. Millimeter Wave Radar Sensor Assembly / GTS Display "-"

      Tech Tips

      The millimeter wave radar sensor assembly is connected to the CAN communication system, but the millimeter wave radar sensor assembly does not store or output CAN communication DTCs.

    28. Central Gateway ECU (Network Gateway ECU) / GTS "Central Gateway"

      Tech Tips

      The central gateway ECU (network gateway ECU) is connected to the CAN communication system, but the central gateway ECU (network gateway ECU) does not store or output CAN communication DTCs.

    29. Forward Recognition Camera / GTS "LKA/LDA"

      DTC Code Detection Item
      U0101 Lost Communication with TCM
      U0123 Lost Communication with Yaw Rate Sensor Module
      U0126 Lost Communication with Steering Angle Sensor Module
      U0129 Lost Communication with Brake System Control Module
      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 (Combination Meter)
      U0235*1 Lost Communication with Cruise Control Front Distance Range Sensor
      U023A*2 Lost Communication with Image Processing Module "A"
      U0293 Lost Communication with Hybrid Vehicle Control System
      U1104*1 Lost Communication with Driving Support ECU

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • *1: Refer to Lane Departure Alert System.

        Click here

      • *2: Refer to Lane Departure Alert System.

        Click here

    30. Forward Recognition Camera / GTS "Front Recognition Camera"

      DTC Code Detection Item
      U0101 Lost Communication with TCM
      U0123 Lost Communication with Yaw Rate Sensor Module
      U0129 Lost Communication with Brake System Control Module
      U0142 Lost Communication with Body Control Module "B"
      U0235* Lost Communication with Cruise Control Front Distance Range Sensor
      U0293 Lost Communication with Hybrid Vehicle Control System
      U1104* Lost Communication with Driving Support ECU

      Tech Tips


      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Forward Recognition Camera System.

        Click here

    31. Forward Recognition Camera / GTS Display "Road Sign Assist"

      Forward Recognition Camera / GTS Display "Road Sign Assist"
      DTC Detection Item
      U0101 Lost Communication with TCM
      U0123 Lost Communication with Yaw Rate Sensor Module
      U0129 Lost Communication with Brake System Control Module
      U0142 Lost Communication with Body Control Module "B"
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module (Combination Meter)
      U0293 Lost Communication with Hybrid Vehicle Control System

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.