DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:U0100, U0122, U0125, U0126, U0129, U0235, U1104

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0122 Lost Communication With Vehicle Dynamics Control Module
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
U1104 Lost Communication with Driving Support ECU

DESCRIPTION

The ECM and driving support ECU assembly communicate signals with each sensor and ECU via CAN communication.

If there are any malfunctions in the communication circuit, one or more CAN communication system DTCs are output.

DTC No. DTC Detection Condition Trouble Area
U0100 While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the ECM and the driving support ECU assembly is detected for approximately 1 second or more.

  • CAN communication system

  • ECM

  • Driving support ECU assembly
U0122 When the engine switch is on (IG) and the dynamic radar cruise control system is operating, a communication error between the skid control ECU (master cylinder solenoid) and the ECM is detected for approximately 2.24 seconds or more.

  • CAN communication system

  • Skid control ECU (master cylinder solenoid)

  • ECM
U0125 While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the yaw rate sensor and the driving support ECU assembly is detected for approximately 1 second or more.

  • CAN communication system

  • Yaw rate sensor (airbag sensor assembly)

  • Driving support ECU assembly
U0126 While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the steering sensor and the driving support ECU assembly is detected for approximately 1 second or more.

  • CAN communication system

  • Steering sensor

  • Driving support ECU assembly
U0129 While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the skid control ECU (master cylinder solenoid) and the driving support ECU assembly is detected for approximately 2.5 seconds or more.

  • CAN communication system

  • Skid control ECU (master cylinder solenoid)

  • Driving support ECU assembly
U0235 While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the millimeter wave radar sensor assembly and the driving support ECU assembly is detected for approximately 1 second.

  • CAN communication system

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly
U1104

    Condition 1:

  • While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 1 second.


    Condition 2:

  • While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and ECM is detected for 1 second or more.

    Condition 1:

  • CAN communication system

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly


    Condition 2:

  • CAN communication system

  • ECM

  • Driving support ECU assembly

PROCEDURE


  1. CHECK FOR DTCs


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Clear the DTCs Click here.

    4. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.


      1. Turn the engine switch on (IG).

      2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON/OFF).

      3. Drive the vehicle at 5 km/h (3 mph) or more for 5 second or more.

    5. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC U0100, U0122, U0125, U0126, U0129, U0235 and U1104 are not output A
      DTC U0100, U0122, U0125, U0126, U0129, U0235 or U1104 is output (for LHD) B
      DTC U0100, U0122, U0125, U0126, U0129, U0235 or U1104 is output (for RHD) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here