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Home >> Toyota >> 2011 >> Avalon Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System SFI System (Diagnostic Codes (P0136 - P0441)) >> SFI System >> DTC P0171: System Too Lean (Bank 1) (FROM 12/2010); DTC P0172: System Too Rich (Bank 1) (FROM 12/2010); DTC P0174: System Too Lean (Bank 2) (FROM 12/2010); DTC P0175: System Too Rich (Bank 2) (FROM 12/2010) >> Confirmation Driving Pattern
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Confirmation Driving Pattern

Fig 1: View Of Confirmation Driving Pattern Graph
GTY302639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON 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 ignition switch off and wait for 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on [A].
  6. Start the engine and warm it up (until the engine coolant temperature is 75°C (167°F) or higher) with all the accessories switched off [B].
  7. With the engine warmed up, idle the engine for 2 minutes or more [C].
  8. Drive the vehicle at between 37 and 75 mph (60 and 120 km/h) and at an engine speed of between 1400 and 3200 rpm for 5 minutes or more [D].
  9. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
  10. Read the pending DTCs [E].

    HINT: 

    If a pending DTC is output, the system is malfunctioning

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