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Home >> Lexus >> 2011 >> HS 250h >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0010 - P0420)) >> SFI System >> DTC P0101: Mass Air Flow Circuit Range / Performance Problem >> Confirmation Driving Pattern
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Confirmation Driving Pattern

Fig 1: Identifying Vehicle Speed Driving Pattern / Scantool Operation Diagram
GTY189743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs. Refer to DTC CHECK / CLEAR .
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG) and turn the Techstream on.
  7. Put the engine in inspection mode. Refer to INSPECTION MODE PROCEDURE .
  8. Start the engine and warm it up until the engine coolant temperature reaches 70°C (158°F) or more [A].
  9. Drive the vehicle at approximately 50 mph (80 km/h) to 70 mph (112 km/h) for 5 minutes or more [B].
    WARNING:

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

    HINT: 

    Drive while keeping the engine load as stable as possible.

  10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
  11. Read the pending DTCs [C].

    HINT: 

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  12. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  13. Input the DTC: P0101.
  14. 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
  15. If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [B] and [C] again.