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 meteredpurge flow follows the same slope and offset characteristics. However, the purge solenoidnormally 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 Short to ground in PCSV circuit, ECM/PCM sets DTC P0445.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Circuit continuity check, low | 1. Poor connection 2. Short to ground in control circuit 3. PCSV |
Enable Conditions |
•
Engine speed >240
•
Battery voltage 10.7~16V | |
Threshold Value |
•
Short circuit to ground or to battery | |
Diagnostic Time |
•
Continuous | |
MIL ON Condition |
•
3 driving cycle |
Item | Specification |
PCSV Coil Resistance (Ω) | 24 ± 2 [20 ℃ 68 ℉] |
