PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:U0123, U0126, U0129, U0155, U023A, U0293

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
U0155 Lost Communication with Combination Meter
U023A Lost Communication with Front Camera Module
U0293 Lost Communication with Hybrid Vehicle Control System

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0123 The pre-crash safety city sensor is unable to receive data from the yaw rate sensor continuously for 1 second or more.

  • CAN communication system

  • Yaw rate sensor

  • Pre-crash safety city sensor
U0126 The pre-crash safety city sensor is unable to receive data from the spiral with sensor cable sub-assembly (steering angle sensor) continuously for 1 second or more.

  • CAN communication system

  • Spiral with sensor cable sub-assembly (steering angle sensor)

  • Pre-crash safety city sensor
U0129 The pre-crash safety city sensor is unable to receive data from the brake booster with master cylinder assembly (skid control ECU) for 5 seconds or more.

  • CAN communication system

  • Brake booster with master cylinder assembly (skid control ECU)

  • Pre-crash safety city sensor
U0155 The pre-crash safety city sensor is unable to receive data from the combination meter assembly continuously for 80 seconds or more.

  • CAN communication system

  • Combination meter assembly

  • Pre-crash safety city sensor
U023A The brake booster with master cylinder assembly (skid control ECU) is unable to receive data from the pre-crash safety city sensor for 2 seconds or more.

  • CAN communication system

  • Pre-crash safety city sensor
U0293 The hybrid vehicle control ECU is unable to receive data from the pre-crash safety city sensor for 6 seconds or more.

  • CAN communication system

  • hybrid vehicle control ECU

  • Pre-crash safety city sensor

CAUTION / NOTICE / HINT

Tech Tips

Communication may be suspended if the temperature of the pre-crash city sensor is abnormal. In this case, DTC U023A will be stored, however when the temperature returns to normal, communication will return.

PROCEDURE


  1. CHECK FOR DTCs (CAN COMMUNICATION SYSTEM)


    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.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC U0123, U0126, U0129, U0155, U023A and U0293 are not output A
      DTC U0123, U0126, U0129, U0155, U023A or U0293 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here