LEV II EVAP Monitor Process
WARNING: This page is about a different car, the 2006 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
| Sequence | Operation | Description |
|---|---|---|
| 1 | Fuel vapor measurement | EVAP VSV is turned OFF (closed) and EVAP pressure is measured. If EVAP pressure is not stable, EVAP monitor is cancelled to prevent inaccurate monitor. |
| 2 | Vacuum introduction | EVAP VSV is turned ON (open) and CCV is truned ON (closed). As a result, intake manifold pressure (vacuum) is introlduced to EVAP system. |
| 3 | EVAP leak check | EVAP VSV is turned OFF (closed) to seal EVAP system. EVAP pressure increase is measure for 5 seconds when EVAP pressure is -20 mmHg and -17 mmHg. If increase is large, ECM concludes EVAP system has a leak. |
| 4 | Restore | CCV is turned OFF (open) to finish EVAP Monitor |