The evaporative emissions system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Canister Closing Valve (CCV) closes off the air inlet into the canister for leak detection of the evaporative emission system. The CCV also prevents fuel vapors from escaping from the canister. When the engine purges the HC vapors from the canister, the clean air comes into the canister through the canister air-filter and the CCV.
If there is Short to ground in CCV circuit, PCM sets DTC P0447.
Item
Detecting Condition
Possible cause
DTC Strategy
Circuit check, low
Poor Connection
Open or Short in Power Circuit
Open or short in Control Circuit
CCV
ECM
Enable Conditions
-
Threshold value
Short circuit to GND
Diagnosis Time
MIL On Condition
2 driving cycles
Specification
Coil Resistance(?)
23~26 ? (20?(68?))