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Leak Diagnostics - Denso Engine Management System (B5244S; 2001-2002) : Notes

Overview 

Vapor which evaporates from the fuel in the fuel tank is routed to and stored in the EVAP canister from where it is guided into the combustion process via the canister purge (CP) valve and negative pressure in the intake manifold. The diagnosis is designed to detect leaks between 0.5-1 mm, depending on the model year.

The tank system consists of the fuel tank, fuel tank filler cap, fuel filler pipe, roll-over valve, EVAP canister, EVAP components, fuel tank pressure sensor, and EVAP canister shut-off valve.

The diagnostic is divided into different phases under which the various components are tested and faulty components are isolated with a diagnostic trouble code (DTC).

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