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Home >> Toyota >> 2017 >> Mirai >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Dynamic Radar Cruise Control System - Diagnostic Codes & Circuit Tests >> Dynamic Radar Cruise Control System >> DTC U0104: Lost Communication with Cruise Control Module; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0293: Lost Communication with Hybrid/EV Powertrain Control Module [11/2018 - ] >> Procedure
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DTC U0104: Lost Communication with Cruise Control Module; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0293: Lost Communication with Hybrid/EV Powertrain Control Module [11/2018 - ]: Procedure

  1. CHECK FOR DTCs 
    1. Clear the DTCs.

      Powertrain > Radar Cruise 1 > 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.

    3. Check for DTCs.

      Powertrain > Radar Cruise 1 > Trouble Codes 

      Result

      Result Proceed to
      DTC U0104, U0122 and U0293 are not output A
      DTC U0104, U0122 or U0293 is output B

    Result: 

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

    Result: 

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