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Home >> Lexus >> 2006 >> GS 300 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine Control System (3UZ-FE)) >> SFI System >> DTC P043E Evaporative Emission System Leak Detection Reference Orifice Low Flow; DTC P043F Evaporative Emission System Reference Orifice High Flow >> Typical Enabling Conditions
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Typical Enabling Conditions

WARNING: This page is about a different car, the 2006 Lexus GS 430. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL ENABLING CONDITIONS

Enable conditions of EVAP key-OFF monitor -
P043E (0.02 inch reference orifice - low flow)
P043F (0.02 inch reference orifice - high flow)
P0441 (EVAP canister purge valve - open stuck)
P0441 (EVAP canister purge valve - close stuck)
P0451 (EVAP pressure sensor - noise)
P0455 (EVAP gross leak)
P0456 (EVAP 0.2 inch leak)
P2401 (EVAP leak detection pump - stuck OFF)
P2402 (EVAP leak detection pump - stuck ON)
P2419 (EVAP canister vent valve - stuck ON)
P2420 (EVAP canister vent valve - stuck OFF)
-
Atmospheric pressure 70 to 110 kPa (525 to 825 mmHg)
Battery voltage 10.5 V or higher
Vehicle speed 4 km/h (2.5 mph) or less
Engine switch Off
Time after key off 5 or 7 or 9.5 hours
EVAP pressure sensor malfunction (P0450, P0452, P0453) Not detected
EVAP canister purge valve Not operated by scan tool
EVAP canister vent valve Not operated by scan tool
EVAP leak detection pump Not operated by scan tool
Both of the following conditions 1 and 2 are met before key off -
1. Duration that vehicle has been driven 5 minutes or more
2. EVAP purge operation Performed
ECT 4.4 to 35°C (40 to 95°F)
IAT 4.4 to 35°C (40 to 95°F)
  1. Key-off monitor sequence 1 to 8 
    1. Atmospheric pressure measurement 
      ATMOSPHERIC PRESSURE MEASUREMENT SPECIFICATIONS

      Next sequence is run if the following condition is met -
      Atmospheric pressure change Within 0.3 kPa (2.25 mmHg) in 1 second
    2. First reference pressure measurement 
      FIRST REFERENCE PRESSURE MEASUREMENT SPECIFICATIONS

      Next sequence is run if the following conditions are met -
      EVAP pressure just after reference pressure measurement start -1 kPa (-7.5 mmHg) or lower
      Reference pressure -4.85 to -1.05 kPa- (-36.37 to -7.92 mmHg)
      Reference pressure Saturated within 60 seconds
    3. EVAP canister vent valve closed stuck check 
      EVAP CANISTER VENT VALVE CLOSED STUCK CHECK SPECIFICATIONS

      Next sequence is run if the following condition is met -
      EVAP pressure change after vent valve is ON 0.3 kPa (2.25 mmHg) or more
    4. Vacuum introduction 
      VACUUM INTRODUCTION

      Next sequence is run if the following condition is met -
      EVAP pressure Saturated within 15 minutes
    5. EVAP canister purge valve closed stuck check 
      EVAP CANISTER PURGE VALVE CLOSED STUCK CHECK SPECIFICATIONS

      Next sequence is run if the following condition is met -
      EVAP pressure change after purge valve is open 0.3 kPa (2.25 mmHg) or more
    6. Second reference pressure measurement 
      SECOND REFERENCE PRESSURE MEASUREMENT SPECIFICATIONS

      Next sequence is run if the following conditions are met -
      EVAP pressure just after reference pressure measurement -1 kPa (-7.5 mmHg) or lower
      Reference pressure -4.85 to -1.05 kPa (-36.37 to -7.92 mmHg)
      Reference pressure Saturated within 60 seconds
      Difference between first reference pressure Less than 0.7 kPa (5.25 mmHg)
    7. Leak check 
      LEAK CHECK SPECIFICATIONS

      Next sequence is run if the following condition is met -
      EVAP pressure when vacuum introduction is complete Lower than second reference pressure
    8. Atmospheric pressure measurement 
      ATMOSPHERIC PRESSURE MEASUREMENT SPECIFICATIONS

      EVAP monitor is complete if the following condition is met -
      Atmospheric pressure difference between sequence 1 and 8 Within 0.3 kPa (2.25 mmHg)