DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:U0125, U0126, U0129, U0293, U1104

DTC Code DTC Name
U0125 Lost Communication with Yaw Rate Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0129 Lost Communication with Brake System Control Module
U0293 HV ECU Communication
U1104 Lost Communication with Driving Support ECU

DESCRIPTION

This DTC is output when a communication malfunction occurs between the sensors and ECUs.

DTC Code DTC Detection Condition Trouble Area
U0125

    w/ Full-speed range following function:

  • 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 seconds or more


    w/o Full-speed range following function:

  • While the vehicle speed is 36 km/h (22 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 seconds or more

  • CAN communication system

  • Yaw rate sensor

  • Driving support ECU assembly
U0126

    w/ Full-speed range following function:

  • 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 0.8 seconds or more


    w/o Full-speed range following function:

  • While the vehicle speed is 36 km/h (22 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

    w/ Full-speed range following function:

  • 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 assembly and the driving support ECU assembly is detected for approximately 2.5 seconds or more


    w/o Full-speed range following function:

  • While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the skid control ECU assembly and the driving support ECU assembly is detected for approximately 2.5 seconds or more

  • CAN communication system

  • Skid control ECU assembly

  • Driving support ECU assembly
U0293

    w/ Full-speed range following function:

  • 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 power management control ECU and the driving support ECU assembly is detected for approximately 1 second or more


    w/o Full-speed range following function:

  • While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the power management control ECU and the driving support ECU assembly is detected for approximately 1 second or more

  • CAN communication system

  • Power management control ECU

  • Driving support ECU assembly
U1104

    w/ Full-speed range following function:

  • 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 0.2 seconds or more


    w/o Full-speed range following function:

  • While the vehicle speed is 36 km/h (22 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 0.2 seconds or more

  • CAN communication system

  • Driving support ECU assembly

  • Millimeter wave radar sensor assembly

PROCEDURE


  1. CHECK FOR DTCs


    1. Clear the DTCs Click here.

    2. 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 power switch on (IG).

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

      3. w/ Full-speed range following function: Drive the vehicle at 5 km/h (3 mph) or more for 5 seconds or more.

        w/o Full-speed range following function: Drive the vehicle at 36 km/h (22 mph) or more for 5 seconds or more.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC U0125, U0126, U0129, U0293 and U1104 are not output A
      DTC U0125, U0126, U0129, U0293 or U1104 is output (for LHD) B
      DTC U0125, U0126, U0129, U0293 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