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Evaporative Emission Control System: Overview Hyundai Elantra III facelift

Testing & Diagnostics 3 illustrations ~176 words

Description

Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor passes through vent hoses or tubes to the canister filled with charcoal and the canister temporarily holds the vapor in the charcoal. If ECM determines to draw the gathered vapor into the combustion chambers during certain operating conditions, it will use vacuum in intake manifold to move it.

Scheme 12

Scheme 12: Schematic Diagram

A ratchet tightening device on the threaded fuel filler cap reduces the chances of incorrect installation, which would seal the fuel filler. After the gasket on the fuel filler cap and the filler neck flange contact each other, the ratchet produces a loud clicking noise indicating the seal has been set.

Scheme 13

Scheme 13: Description

Scheme 14

Scheme 14: Replace
  1. Remove the rear left wheel house inner cover (Refer to «INTERIOR TRIM»(ref-381705-S34865853692010123100000) ).
  2. Disconnect the hose (A) connected with the canister and remove the fuel tank air filter (B) from the filler-neck assembly after unscrewing the mounting bolts (C).