Typical Enabling Conditions
All:
TYPICAL ENABLING CONDITIONS
| The monitor will run whenever the following DTCs are not present | None |
Enable conditions of EVAP key-off monitor
ENABLE CONDITIONS OF EVAP KEY-OFF MONITOR
| Atmospheric pressure | 70 to 110 kPa (525 to 825 mmHg) [absolute pressure] |
| Battery voltage | 10.5 V or higher |
| Vehicle speed | 2.5 mph (4 km/h) or less |
| Ignition switch | OFF |
| Time after key off | 5 hours |
| EVAP pressure sensor malfunction (P0450, P0452, P0453) | Not operated |
| 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 set before key off | Conditions 1 and 2 |
| 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) |
EVAP key-off monitor sequence 1 to 8
- Atmospheric pressure measurement ATMOSPHERIC PRESSURE MEASUREMENT
Next sequence is run if the following condition is set: - Atmospheric pressure change for 10 seconds Less than 0.3 kPa (2.25 mmHg) in 1 second - Reference pressure measurement REFERENCE PRESSURE MEASUREMENT
Next sequence is run if the following conditions are set: - EVAP pressure just after reference pressure measurement start -1 kPa (-7.5 mmHg) or lower Reference pressure -4.5 to -1 kPa (-33.75 to -7.5 mmHg) Reference pressure Saturated within 60 seconds - EVAP canister vent valve close stuck check EVAP CANISTER VENT VALVE CLOSE STUCK
Next sequence is run if the following condition is set: - EVAP pressure change after vent valve is ON 0.3 kPa (2.25 mmHg) or more - Vacuum introduction and EVAP leak check VACUUM INTRODUCTION AND EVAP LEAK
Next sequence is run if the following condition is set: - EVAP pressure Saturated within 12 minutes - EVAP canister purge valve close stuck check EVAP CANISTER PURGE VALVE CLOSE STUCK
Next sequence is run if the following condition is set: - EVAP pressure change after purge valve is open 0.3 kPa (2.25 mmHg) or more - Second reference pressure measurement SECOND REFERENCE PRESSURE MEASUREMENT
Next sequence run if all of following conditions set: Condition 1,2,3 and 4 1. EVAP pressure just after reference pressure -1 kPa-g (-7.5 mmHg-g) or less 2. Reference pressure -4.85 to -1.057 kPa-g (-36.4 to -7.93 mmHg-g) 3. Reference pressure Saturated within 60 seconds 4. Reference pressure difference between first and second Less than 0.7 kPa-g (5.25 mmHg-g) - Leak check REFERENCE PRESSURE SPECIFICATIONS
Next sequence run if following condition set: - EVAP pressure when vacuum introduction complete Second reference pressure or less - Atmospheric pressure measurement ATMOSPHERIC PRESSURE MEASUREMENT
EVAP monitor complete if following condition set: - Atmospheric pressure difference between sequence 1 and 8 Within 0.3 kPa-g (2.25 mmHg-g)