The purge solenoid is a pneumatic device that meters the air and fuel (purge) vapor flow to the purge port. In a sense, the purge solenoid is comparable to a fuel injector, because the metered purge flow follows the same slope and offset characteristics. However, the purge solenoid normally runs with a duty cycle at a fixed frequency because the opening response is significantly slower than a fuel injector. It would not practical to run the solenoid synchronously with engine events except perhaps at very low RPM. The normal frequencies for the purge solenoid are between 8 and 20 Hz.
If there is Open, Short to ground in PCSV circuit, ECM sets DTC P0444.
Item
Detecting Condition
Possible Cause
DTC Strategy
Circuit continuity check
Poor connection
Open or Short to ground in power circuit
Open in control circuit
PCSV
Enable Conditions
IG ON
Battery voltage 10~16V
Engine speed ? 500rpm
Purge duty < 90%
Threshold Value
short to ground or open circuit
Diagnostic Time
5sec
MIL ON Condition
3 driving cycle
Specification
PCSV Coil Resistance (O)
24.0 [20 ? 68 ?]