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Home >> Mazda >> 1995 >> B2300 2WD L4-2.3L VIN A >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Description and Operation >> Sub-System Description >> Fuel Evaporative Emission System
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Fuel Evaporative Emission System




DESCRIPTION
The fuel evaporative emission system consists of the fuel vapor valve, evaporative emission canister, evaporative emission canister purge solenoid, [1][2]purge flow sensor, powertrain control module (PCM) and input devices. The amount of evaporative fumes introduced into the engine and burned is controlled by the solenoid corresponding to the engine's operating conditions. To provide the best engine performance, the solenoid is controlled by the PCM using an input signal from the purge flow sensor.

OPERATION
The evaporative emission canister purge solenoid is controlled by signals from the PCM to perform purging of the evaporative emission canister. The [1][2]purge flow sensor monitors vapor flow through the evaporative emission canister purge solenoid and signals the PCM of flow or no flow conditions. The PCM monitors this signal and other input signals regarding engine condition. Purging is done when the following conditions are met:
- After warm up
- Accelerator pedal depressed (off idle)


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