Sunday, November 13, 2016

DTC P0443 Evaporative Emission System Purge Control Valve Circuit

One of the characteristic of gasoline is it easy to evaporate on ambient temperature. For example in the gasoline-drive engine, in the fuel tank, the vapor of gasoline should not be released to outside/atmosphere, because it contains hydrocarbon that very harmful and pollutant.

Suzuki Kizashi has emission control to absorb the gasoline vapor and store it into carbon canister, So the hydrocarbon can not escape to the air. When some conditions meet, the gasoline vapor in the carbon canister is released and is supplied to the engine. Engine Control Module regulates the Evaporative Purge Control Valve to open and close.

Evaporative Purge Control Valve receives power from battery 12 volt and ground-controlled by Engine Control Module. If voltage from Purge control valve is less than 3 volt during duty cycle less than 90%, it means there is open circuit. Resistance value of Purge control valve is 24,1 ohm.

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