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Home >> Toyota >> 2022 >> Prius LE AWD-e >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Dynamic Radar Cruise Control System - Diagnostic Codes & Circuit Tests >> Dynamic Radar Cruise Control System >> DTC U0122-87: Lost Communication with Vehicle Dynamics Control Module Missing Message; DTC U0293-87: Lost Communication With Hybrid Powertrain Control Module Missing Message; DTC U1104-87: Lost Communication with Driving Support ECU Missing Message [11/2015 - 11/2017] >> Procedure
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DTC U0122-87: Lost Communication with Vehicle Dynamics Control Module Missing Message; DTC U0293-87: Lost Communication With Hybrid Powertrain Control Module Missing Message; DTC U1104-87: Lost Communication with Driving Support ECU Missing Message [11/2015 - 11/2017]: Procedure

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

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

      Powertrain > Cruise Control > 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 > Cruise Control > Trouble Codes 

      Result

      Result Proceed to
      DTC U0122-87, U0293-87 and U1104-87 are not output A
      DTC U0122-87, U29387 or U1104-87 is not output B

    Result: 

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

    Result: 

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