LANE DEPARTURE ALERT SYSTEM, Diagnostic DTC:U0123, U0126, U0129, U0142, U0155

DTC Code DTC Name
U0123 Lost Communication with Yaw Rate Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0129 Lost Communication with Brake System Control Module
U0142 Lost Communication with Body Control Module "B"
U0155 Lost Communication with Combination Meter

DESCRIPTION

When a malfunction is detected between various ECUs and sensors, these DTCs are stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0123 Lost Communication with Yaw Rate Sensor Module While the vehicle is being driven at 5 km/h (4 mph) or more, a communication error between the yaw rate and acceleration sensor (airbag sensor assembly) and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Yaw rate and acceleration sensor (airbag sensor assembly)

  • Forward recognition camera
U0126 Lost Communication with Steering Angle Sensor Module 2 seconds after the ignition switch is turned to ON, a communication error between the steering angle sensor (spiral with sensor cable sub-assembly) and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Steering angle sensor (spiral with sensor cable sub-assembly)

  • Forward recognition camera
U0129 Lost Communication with Brake System Control Module 2 seconds after the ignition switch is turned to ON, a communication error between the skid control ECU (brake actuator assembly) and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Skid control ECU (brake actuator assembly)

  • Forward recognition camera
U0142 Lost Communication with Body Control Module "B" 2 seconds after the ignition switch is turned to ON, a communication error between the combination meter assembly and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Combination meter assembly

  • Forward recognition camera
U0155 Lost Communication with Combination Meter 2 seconds after the ignition switch is turned to ON, a communication error between the combination meter assembly and the forward recognition camera is detected for approximately 50 seconds or more.

  • CAN communication system

  • Combination meter assembly

  • Forward recognition camera

PROCEDURE


  1. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM)


    1. Clear the DTCs.

      Click here


      Chassis > LKA/LDA > Clear DTCs

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

      Tech Tips

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

    3. Check for DTCs.

      Click here


      Chassis > LKA/LDA > Trouble Codes
      Result
      Result Proceed to
      DTC U0123, U0126, U0129, U0142 and U0155 are not output A
      DTC U0123, U0126, U0129, U0142 or U0155 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM for LHD: Click here
    GO TO CAN COMMUNICATION SYSTEM for RHD: Click here