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Home >> Toyota >> 2013 >> Prius Two >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Dynamic Radar Cruise Control System (Diagnostic Codes & Circuit Tests) (Except Plug-In) >> Dynamic Radar Cruise Control System >> DTC C1A0A: Front Radar Sensor Region Code Mismatch >> Procedure
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DTC C1A0A: Front Radar Sensor Region Code Mismatch: Procedure

  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Radar Cruise / Data List / Country# (F Radar Sens).
    5. Read the Data List and check the country specification information of the front millimeter wave radar sensor and vehicle.
      RADAR CRUISE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Country# (F Radar Sens) Millimeter wave radar sensor country signal/JPN, NA, EURO, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC, NOFIX Actual country code -
      RESULT

      Result Proceed to
      Country specification information for vehicle and millimeter wave radar sensor match A
      Country specification information for vehicle and millimeter wave radar sensor do not match B

    B → See step   3 

    A: Go to next step 

  2. CHECK WHETHER DTC OUTPUT RECURS (DTC C1A0A) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Clear the DTCs. Refer to DTC CHECK / CLEAR .
    4. Perform the following to make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the malfunction cannot be detected.

      1. Drive the vehicle at a speed for which cruise control operation is possible.
      2. Turn the cruise control main switch on.
      3. Push the -SET switch to activate the cruise control.
    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
    6. Read the DTCs.

      Result

      Result Proceed to
      DTC is not output A
      DTC C1A0A is output B

    B → See step   4 

    A → END 

  3. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY. Refer to  REMOVAL 
  4. REPLACE DRIVING SUPPORT ECU. Refer to  REMOVAL