July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Purge flow monitor

If EVAP system pressure change is less than 7.5 mmHg (1 kPa) when the engine is running and the EVAP VSV is turned ON (closed), the ECM (Included in HV control ECU) determines that the purge flow is insufficient.

Fig 1: Purge Flow Diagram