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Home >> Toyota >> 2009 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine Control System (1AR-FE) - DTC P0705 - P2A00, DTC U0101) >> DTC P2A00 A/F Sensor Circuit Slow Response (Bank 1 Sensor 1) >> Confirmation Driving Pattern

Confirmation Driving Pattern

WARNING: This page is about a different variant/trim than selected.

HINT:

Performing this confirmation pattern will activate the air fuel ratio sensor response monitor.

Fig 1: Vehicle Speed Driving Pattern
G06023292Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off.
  6. Turn the ignition switch to ON and turn the Techstream on.
  7. Enter the following menus: Powertrain/Engine/Monitor/O2 Sensor.
  8. Check that the Status 2 of O2 Sensor is Incomplete.
  9. Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher) [A].
  10. Drive the vehicle at a constant speed of between 47 and 62 mph (75 and 100 km/h) for 10 minutes [B].
  11. Those items will change to Complete after completing the drive pattern.
  12. If the values indicated on the Techstream do not change, perform Readiness Monitor Drive Pattern for the air fuel ratio sensor and heated oxygen sensor (See READINESS MONITOR DRIVE PATTERN ).
  13. Check the monitor result values on the Techstream by entering the following menus: Powertrain/Engine/Monitor/O2 Sensor/Details/RANGE B1S1.
  14. Note the value of the Monitor Result.
  15. Enter the following menus: Powertrain/Engine/Utility/All Readiness.
  16. Input the DTC: P2A00.
  17. Check the DTC judgment result [C].
    TECHSTREAM DISPLAY DESCRIPTION

    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 memory limit

    HINT:

    If the judgment result shows ABNORMAL, the system has a malfunction.

  18. If the test result is UNKNOWN, enter the following menus: Powertrain/Engine/Trouble Codes/Pending.
  19. Read Pending DTCs.

    HINT:

    If a pending DTC is output, the system is malfunctioning.

  20. If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs (See 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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