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Home >> Suzuki >> 2007 >> Swift + >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls & Fuel - 1.6L - Introduction (2 Of 2) >> Description and OperationEngine Control Module Description >> Evaporative Emission Control System DescriptionEVAP System Operation >> Canister Vent Restriction TestPurge Valve Leak Test
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Canister Vent Restriction TestPurge Valve Leak Test

After the small leak test has passed, a vacuum is retained in the evaporative emission (EVAP) system. The control module tests for a restricted vent path by commanding the purge valve OFF closed and the vent valve OFF open. The fuel tank pressure (FTP) sensor is monitored for a decrease in EVAP system vacuum. If the vacuum does not decrease to near 0 inch H2O in a calibrated time, a DTC sets.

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