Typical Enabling Conditions
WARNING: This page is about a different car, the 2007 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 (Canister 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 | Less than 4 km/h (2.5 mph) |
| Engine switch | Off |
| Time after key off | 5 or 7 or 9.5 hours |
| EVAP canister pressure sensor malfunction (P0450, P0452, P0453) | Not detected |
| EVAP purge VSV | 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
- Atmospheric pressure measurement TYPICAL ENABLING CONDITIONS
Next sequence is run if the following condition is met - Atmospheric pressure change Within 0.3 kPa (2.25 mmHg) in 1 second - First reference pressure measurement TYPICAL ENABLING CONDITIONS
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 - EVAP canister vent valve closed stuck check TYPICAL ENABLING CONDITIONS
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 - Vacuum introduction TYPICAL ENABLING CONDITIONS
Next sequence is run if the following condition is met - EVAP pressure Saturated within 15 minutes - EVAP purge VSV closed stuck check TYPICAL ENABLING CONDITIONS
Next sequence is run if the following condition is met - EVAP pressure change after purge VSV is open 0.3 kPa (2.25 mmHg) or more - Second reference pressure measurement TYPICAL ENABLING CONDITIONS
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 Difference between first reference pressure and second reference pressure Less than 0.7 kPa (5.25 mmHg) - Leak check TYPICAL ENABLING CONDITIONS
Next sequence is run if the following condition is met - EVAP pressure when vacuum introduction is complete Lower than second reference pressure - Atmospheric pressure measurement TYPICAL ENABLING CONDITIONS
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)