2005 Toyota Avalon LimitedFACTORY OEM SERVICE PROCEDURE

Typical Enabling Conditions: Overview

TYPICAL ENABLING CONDITIONS

Monitor runs whenever these DTCs not present See LIST OF DISABLE A MONITOR 
EVAP key-off monitor runs when all of following conditions met -
Atmospheric pressure 525 to 825 mmHg (70 to 110 kPa)
Battery voltage 10.5 V or more
Vehicle speed Below 2.5 mph (4 km/h)
Ignition switch OFF
Engine condition Not running
FTP sensor malfunction (P0450, P0452, P0453) Not detected
Purge VSV Not operated by scan tool
Vent valve Not operated by scan tool
Leak detection pump Not operated by scan tool
Both of following conditions 1 and 2 met before ignition OFF Conditions 1 and 2
1. Duration that vehicle is driven 5 min. or more
2. Purge flow Executed
ECT 4.4° to 35°C (40° to 95°F)
IAT 4.4° to 35°C (40° to 95°F)
Time after engine stopped 5 hours

Example of restart time

RESTART TIME

First time 7 hours
Second time 9 hours and 30 minutes

Key-off monitor sequence is 1 to 8 

  1. Atmospheric pressure 
    ATMOSPHERIC PRESSURE

    Next sequence is run if following condition met -
    Atmospheric pressure change for 10 sec. Less than 2.25 mmHg (0.3 kPa) for 1 seconds.
  2. First reference pressure 
    REFERENCE PRESSURE

    Next sequence is run if all of following conditions met Condition 1, 2 and 3
    1. FTP when 4 seconds after reference pressure measurement -7.5 mmHg (-1 kPa) or less
    2. Reference pressure -36.38 to -7.93 mmHg (-4.85 to -1.057 kPa)
    3. Reference pressure Saturated
  3. Vent valve stuck closed check 
    VENT VALVE STUCK CLOSED CHECK

    Next sequence is run if following condition met -
    FTP change for 10 seconds after vent valve ON (closed) 2.25 mmHg (0.3 kPa) or more
  4. Vacuum introduction and leak 
    VACUUM INTRODUCTION AND LEAK

    Next sequence is run if both of following conditions met Condition 1 and 2
    1. Vacuum introduction time 12 minutes or less
    2. FTP FTP was saturated
  5. Purge VSV stuck closed check 
    PURGE VSV STUCK CLOSED CHECK

    Next sequence is run if following condition met -
    FTP change for 10 seconds after purge VSV ON (open) 2.25 mmHg (0.3 kPa) or more
  6. Second reference pressure measurement 
    PRESSURE MEASUREMENT

    Next sequence is run if all of following conditions met Condition 1, 2, 3 and 4
    1. FTP when 4 sec. after reference pressure measurement -7.5 mmHg (-1 kPa) or less
    2. Reference pressure -36.4 to -7.92 mmHg (-4.85 to -1.057 kPa)
    3. Reference pressure Saturated
    4. Reference pressure difference between first and second 5.25 mmHg (0.7 kPa) or less
  7. Leak check 
    LEAK CHECK

    Next sequence is run if following condition met -
    FTP when vacuum introduction was complete Second reference pressure or less
  8. Atmospheric pressure 
    ATMOSPHERIC PRESSURE

    Monitor is complete if following 2.25 mmHg (0.3 kPa) or less
    Atmospheric pressure difference between sequence 1 and 8 2.25 mmHg (0.3 kPa) or less
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