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

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 Lost Communication with Hybrid Vehicle Control System

DESCRIPTION

The driving support ECU assembly communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0125 Lost Communication with Yaw Rate Sensor Module

    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 0.8 seconds or more.


    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 0.8 seconds or more.

  • CAN communication system

  • Airbag sensor assembly (Yaw rate and acceleration sensor)

  • Driving support ECU assembly

  • Network gateway ECU
U0126 Lost Communication with Steering Angle Sensor Module

    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 0.8 seconds or more.


    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.

  • CAN communication system

  • Steering sensor

  • Driving support ECU assembly

  • Network gateway ECU
U0129 Lost Communication with Brake System Control Module

    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 (brake booster with master cylinder assembly) and the driving support ECU assembly is detected for approximately 2.3 seconds or more.


    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 (brake booster with master cylinder assembly) and the driving support ECU assembly is detected for approximately 2.3 seconds or more.

  • CAN communication system

  • Skid control ECU (brake booster with master cylinder assembly)

  • Driving support ECU assembly

  • Network gateway ECU
U0293 Lost Communication with Hybrid Vehicle Control System

    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 hybrid vehicle control ECU and the driving support ECU assembly is detected for approximately 0.8 seconds or more.


    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 hybrid vehicle control ECU and the driving support ECU assembly is detected for approximately 0.8 seconds or more.

  • CAN communication system

  • Hybrid vehicle control ECU

  • Driving support ECU assembly

  • Network gateway ECU

PROCEDURE


  1. CHECK FOR DTCs (RADAR CRUISE 2)


    1. Clear the DTCs.

      Click here


      Powertrain > Radar Cruise2 > Clear DTCs

    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 button).

      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


      Powertrain > Radar Cruise2 > Trouble Codes
      Result
      Result Proceed to
      DTC U0125, U0126, U0129, U0293 and U1104 are not output A
      DTC U0125, U0126, U0129, U0293 or U1104 is not output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here