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Home >> Lexus >> 2011 >> CT 200h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0010-P0420)) >> SFI System >> DTC P0401: Exhaust Gas Recirculation Flow Insufficient Detected >> Confirmation Driving Pattern
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Confirmation Driving Pattern

Fig 1: Identifying Power Switch On (IG) Graph
GTY324696Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure). Refer to DTC CHECK / CLEAR .
  4. Turn the power switch off and wait for 30 seconds.
  5. Turn the power switch on (IG) and turn the Techstream on.
  6. Put the engine in inspection mode (maintenance mode). Refer to INSPECTION MODE PROCEDURE .
  7. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].

    HINT: 

    The A/C switch and all accessory switches should be off and shift lever in P or N.

  8. Accelerate the vehicle to 60 km/h (37 mph) or more by depressing the accelerator pedal for at least 10 seconds [B].
    WARNING:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    HINT: 

    When accelerating the vehicle, depress the accelerator pedal more than normal to start the engine.

  9. Idle the engine for 30 seconds or more [C].
  10. Accelerate the vehicle to 60 km/h (37 mph) with the shift lever in B [D].
  11. Perform fuel cut operation for 5 seconds or more, with the accelerator pedal fully released [E].
    WARNING:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    HINT: 

    When fuel cut is operating "Idle Fuel Cut" in Data List is ON.

  12. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / Exhaust Gas Recirculation/VVT / Status2 [F].
  13. Check that the Exhaust Gas Recirculation/VVT / Current monitor is Complete.

    HINT: 

    If the monitor is Incomplete, perform the driving pattern again.

  14. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / Exhaust Gas Recirculation/VVT /Details.
  15. Check the Details (EGR FLOW INSUFFICIENCY).

    HINT: 

    Make sure that the value is between MIN and MAX.

  16. If the monitor is still Incomplete, perform the following procedure.
  17. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
  18. Read the pending DTCs.

    HINT: 

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  19. Enter the following menus: Power train / Engine and ECT / Utility / All Readiness.
  20. Input the DTC: P0401.
  21. 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
    UNKNOWN
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

    HINT: 

    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows NORMAL, the system is normal.
    • If the DTC judgment result is INCOMPLETE or UNKNOWN, perform steps [D] through [E] again.
  22. If the judgment result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to DTC CHECK / CLEAR .

    HINT: 

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