General Information

Component Location





General Description

The evaporative emission control 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 PCM controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the engine for combustion. This valve is actuated by the purge control signal from the PCM and controls fuel vapor flow from the canister to the intake manifold.

DTC Description

PCM sets DTC P0444 if the PCM detects that the PCSV control circuit is open.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data




1 PCSV Control Waveform (Key-On)
2 PCSV Control Waveform (Idle)
3 PCSV Control Waveform (Control Circuit Open / Key-On / PCM Side)