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Home >> Toyota >> 2021 >> Prius LE >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Clearance Sonar System - Diagnostic Codes >> Intelligent Clearance Sonar System >> DTC U0073: Control Module Communication Bus "A" Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0164: Lost Communication with HVAC Control Module; DTC U0293: Lost Communication With Hybrid Powertrain Control Module [11/2015 - ] >> Procedure
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DTC U0073: Control Module Communication Bus "A" Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0164: Lost Communication with HVAC Control Module; DTC U0293: Lost Communication With Hybrid Powertrain Control Module [11/2015 - ]: Procedure

  1. CHECK DTC OUTPUT 
    1. Using the Techstream, check for DTCs according to the prompts on the screen.

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

      HINT: 

      After turning the power switch from off to on (IG), wait 10 seconds or more before checking for DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

    2. Clear the DTCs according to the screen on the Techstream.

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

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs 

    3. Recheck for DTCs.

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

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

      OK

      No DTCs are output.

      HINT: 

      • If CAN communication system DTCs are stored, they may also be stored in other systems.
      • If the CAN communication system has been inspected and repaired in other systems, the DTCs will not be output when rechecking for DTCs.
      • If these DTCs are output frequently, duplicate the conditions that caused the problem symptoms and perform the inspection again, even though DTCs were not output when rechecking for DTCs.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    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 - ] 

    Result: 

    NG 

    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]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - 06/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2021 - ]