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
- 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. - 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 - 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 - 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 - 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 - 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 - Leak check LEAK CHECK
Next sequence is run if following condition met - FTP when vacuum introduction was complete Second reference pressure or less - 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