Hyundai Accent: Emission Control System / Evaporative Emission Control System

Schematic Diagrams

- Schematic Diagram

Canister Canister is filled with charcoal and absorbs evaporated vapor in fuel tank. The gathered fuel vapor in canister is drawn into the intake manifold by the ECM/PCM when appropriate conditions are set.Purge Control Solenoid Valve (PCSV) Purge Control Solenoid Valve (PCSV) is installed in the passage connecting canister and intake manifold. It is a duty type solenoid valve and is operated by ECM/PCM signal.To draw the absorbed vapor into the intake manifold, the ECM/PCM will open the PCSV, otherwise the passage remains closed.Fuel Filler Cap A ratchet tightening device on the threaded fuel filler cap reduces the chances of incorrect installation, seals the fuel filler. After the gasket on the fuel filler cap and the fill neck flange make contact, the ratchet produces a loud clicking noise indicating the seal has been set.

Repair procedures

- Inspection [Evaporate Leakage Test]

1.Select "Evap. Leakage Test".

2.The test shall be conducted in accordance with GDS instructions.

Canister

- Removal

1.Turn the ignition switch OFF and disconnect the battery negative (-) cable.

2.Lift the vehicle.

3.Disconnect the canister close velve extension connector (A).

4. Remove the canister protector (B).

5.Disconnect the canister close velve connector (A).

6.Remove the ventilation hose (B).

7.Remove the air filter (A).

8.Disconnect the vapor hose quick-connector (A).

9.Remove the canister assembly (A) after loosening the bolt and nut.

Canister installation bolt :19.6 - 29.4 N.m (2.0 - 3.0 kgf.m, 14.5 - 21.7 lb-ft)

- Inspection

1.Check for the following items visually.

– Cracks or leakage of the canister

– Loose connection, distortion, or damage of the vapor hose/ tube

A : Canister ↔ AtmosphereB : Canister ↔ Fuel TankC : Canister ↔ Intake Manifold

- Installation

1.Install in the reverse order of removal.

Fuel Filler Cap

- Description 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.

1. Cover
2. Torsion spring
3. Retainer
4. Gasket seal
5. Spring
6. Plate seal
7. Vacuum valve
8. Spring

Fuel Tank Air Filter

- Removal

1.Turn the ignition switch OFF and disconnect the battery negative (-) cable.

2.Lift the vehicle.

3.Disconnect the canister close velve extension connector (A).

4. Remove the canister protector (B).

5.Disconnect the canister close velve connector (A).

6.Remove the ventilation hose (B).

7.Remove the air filter (A).

8.Release the lever (A), and then separate the canister close valve (B) from the fuel tank air filter after rotating it in the direction of the arrow in the figure.