DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:U0122, U0123, U0126, U0293

DTC Code DTC Name
U0122 Lost Communication with Vehicle Dynamics Control Module
U0123 Lost Communication with Yaw Rate Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0293 Lost Communication with Hybrid Vehicle Control System

DESCRIPTION

The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect obstacles in front of the vehicle. Based on this information, the driving support ECU assembly sends pre-crash safety control operation signals. These DTCs are stored when a communication malfunction occurs between the sensors and ECUs that detect crashes, or between ECUs that perform the pre-crash safety control.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0125 Lost Communication with Yaw Rate Sensor Module When the power switch is on (IG), a communication error between the airbag ECU assembly and the driving support ECU assembly is detected for approximately 1 second.

  • CAN communication system

  • Airbag ECU assembly

  • Driving support ECU assembly
U0126 Lost Communication with Steering Angle Sensor Module When the power switch is on (IG), a communication error between the spiral with sensor cable sub-assembly (steering angle sensor) and the driving support ECU assembly is detected for approximately 1 second.

  • CAN communication system

  • Spiral with sensor cable sub-assembly

  • Driving support ECU assembly
U0129 Lost Communication with Brake System Control Module When the power switch is on (IG), a communication error between the brake booster with master cylinder assembly and the driving support ECU assembly is detected for approximately 3 seconds.

  • CAN communication system

  • Brake booster with master cylinder assembly

  • Driving support ECU assembly
U0293 Lost Communication with Hybrid Vehicle Control System When the power switch is on (IG), a communication error between the hybrid vehicle control ECU and driving support ECU assembly is detected for approximately 11.2 seconds.

  • CAN communication system

  • Hybrid vehicle control ECU

  • Driving support ECU assembly
U1104 Lost Communication with Driving Support ECU When the power switch is on (IG), a communication error between the hybrid vehicle control ECU or brake booster with master cylinder assembly and the driving support ECU assembly is detected for approximately 1 second.

  • CAN communication system

  • Hybrid vehicle control ECU

  • Brake booster with master cylinder assembly

  • Driving support ECU assembly

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Powertrain > Radar Cruise > 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.

    3. Check the DTCs.

      Click here


      Powertrain > Radar Cruise > Trouble Codes
      Result
      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output (for LHD) B
      CAN communication system DTCs are 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