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Home >> Toyota >> 2019 >> Prius XLE AWD-e >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (5 Of 8) >> SFI System >> DTC P050A-00: Cold Start Idle Control System Performance [11/2015 - 11/2017] >> Confirmation Driving Pattern
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Confirmation Driving Pattern

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG).
  7. Turn the Techstream on.
  8. Put the engine in Inspection Mode (Maintenance Mode).

    Refer to INSPECTION MODE PROCEDURE [11/2015 - 12/2018]

  9. Start the engine and warm it up for 5 minutes or more.
  10. Stop the engine.
  11. Leave the vehicle outside overnight.
  12. Turn the power switch on (IG) [A].
  13. Turn the Techstream on.
  14. Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.
  15. Check that the value of the Data List item Coolant Temperature is between -10 and 50°C (14 and 122°F).
  16. Put the engine in Inspection Mode (Maintenance Mode).

    Refer to INSPECTION MODE PROCEDURE [11/2015 - 12/2018]

  17. Start the engine and warm it up until the engine coolant temperature is the same as the coolant temperature in the freeze frame data.
  18. Idle the engine for 1 minute or more [B].
  19. Enter the following menus: Powertrain / Engine / Trouble Codes.
  20. Read the pending DTC.

    HINT: 

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  21. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  22. Input the DTC: P050A-00.
  23. Check the DTC judgment result.
    Techstream Display Description
    NORMAL
    • DTC judgment completed
    • System normal
    ABNORMAL
    • DTC judgment completed
    • System abnormal
    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions
    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT: 

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • If the judgment result is INCOMPLETE or N/A, idle the engine for 3 minutes, let the engine cool down, and then perform steps [A] and [B] again.
  24. If no pending DTCs are output, perform a universal trip and check for permanent DTCs.

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

    HINT: 

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTCs are output, the system is normal.