DYNAMIC RADAR CRUISE CONTROL SYSTEM(except 2AR-FE), Diagnostic DTC:U0100, U0125, U0126, U0129

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0125 Lost Communication with Yaw Rate Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0129 Lost Communication with Brake System Control Module

DESCRIPTION

The millimeter wave radar sensor 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
U0100 Lost Communication with ECM / PCM "A" 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 millimeter wave radar sensor assembly is detected for approximately 0.1 seconds or more.

  • CAN communication system

  • ECM

  • Millimeter wave radar sensor assembly
U0125 Lost Communication with Yaw Rate Sensor Module 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 and acceleration sensor (airbag sensor assembly) and millimeter wave radar sensor assembly is detected for approximately 0.1 seconds or more.

  • CAN communication system

  • Yaw rate and acceleration sensor (airbag sensor assembly)

  • Millimeter wave radar sensor assembly
U0126 Lost Communication with Steering Angle Sensor Module 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 millimeter wave radar sensor assembly is detected for approximately 0.1 seconds or more.

  • CAN communication system

  • Steering sensor

  • Millimeter wave radar sensor assembly
U0129 Lost Communication with Brake System Control Module 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 actuator assembly) and millimeter wave radar sensor assembly is detected for approximately 0.1 seconds or more.

  • CAN communication system

  • Skid control ECU (Brake actuator assembly)

  • Millimeter wave radar sensor assembly

PROCEDURE


  1. CHECK FOR DTCs


    1. Clear the DTCs.


      Powertrain > Radar Cruise2 > Clear DTCs

    2. Perform the following procedure.

      Tech Tips

      If the following procedure is not performed, the previously output DTC cannot be detected.


      1. Turn the engine switch on (IG).

      2. Turn the dynamic radar cruise control system on using the cruise control main switch.

      3. Drive the vehicle at 5 km/h (3 mph) or more for 1 second or more.

    3. Check for DTCs.


      Powertrain > Radar Cruise2 > Trouble Codes
      Result
      Result Proceed to
      DTC U0100, U0125, U0126 and U0129 are not output A
      DTC U0100, U0125, U0126 or U0129 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here