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Home >> Toyota >> 2021 >> Prius LE >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Dynamic Radar Cruise Control System - Diagnostic Codes & Circuit Tests >> Dynamic Radar Cruise Control System >> DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System [11/2015 - 07/2020] >> Procedure
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DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System [11/2015 - 07/2020]: Procedure

  1. CHECK FOR DTCs (RADAR CRUISE 2) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [11/2015 - 07/2020]

      Powertrain > Radar Cruise2 > Clear DTCs 

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

      HINT: 

      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.

      Refer to DTC CHECK / CLEAR [11/2015 - 07/2020]

      Powertrain > Radar Cruise2 > Trouble Codes 

      Result

      Result Proceed to
      DTC U0125, U0126, U0129 and U0293 are not output A
      DTC U0125, U0126, U0129 or U0293 is not output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - 12/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2018 - 07/2020] 

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - 12/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2018 - ]