Fig.1) Normal waveform of PCSV under 27% control condition.

Fig.2) Abnormal data of PCSV when PCSV circuit open.

The Purge Control Solenoid Valve (PCSV) is open or closed by the PCM.

At opening, fuel vapor from canister enters into intake manifold. This photo shows the signal waveform of PCSV operating normally.