Hyundai Accent (HC): Emission Control System

Hyundai Accent (HC) (2017 - 2022) Service Manual / Emission Control System

Contents:

Specifications

- Specifications Purge Control Solenoid Valve (PCSV) â–· Specification

ItemSpecification
Coil Resistance (Ω)12.5 ~ 16.5 [20°C (68°F)]

- Tightening Torques
Itemkgf.mN.mlb-ft
Positive Crankcase Ventilation (PCV) valve1.0 - 1.29.8 - 11.72.2 - 2.6
Canister mounting bolt2.2 - 2.421.5 - 23.54.8 - 5.2
Exhaust manifold hit protecter mounting bolt1.0 - 1.29.8 - 11.72.2 - 2.6
EGR cooler pipe mounting bolt1.9 - 2.418.6 - 23.54.1 - 5.2
Exhaust manifold & Catalytic Converter stay mounting bolt4.0 - 5.039.2 - 49.08.8 - 11.0
Engine mounting support braket mounting nut9.0 - 11.088.2 - 107.819.8 - 24.2
Engine mounting support braket mounting bolt / nut6.0 - 7.558.8 - 73.513.2 - 16.5
Exhaust manifold & Catalytic Converter mounting nut3.0 - 4.029.4 - 39.26.6 - 8.8
Catalytic Converter & Center muffler mounting nut4.0 - 6.039.2 - 58.88.8 - 13.2

Description and Operation

- Description Emissions Control System consists of three major systems.

• The Crankcase Emission Control System prevents blow-by gas from releasing into the atmosphere. This system recycles gas back into the intake manifold (Closed Crankcase Ventilation Type).

• The Evaporative Emission Control System prevents evaporative gas from releasing into the atmosphere. This system burns gas at appropriate engine operating condition after gathering it in the canister.

• The Exhaust Emission Control System converts the three pollutants [hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx)] into harmless substances by using the 3-way catalytic converter.

Troubleshooting

- Troubleshooting

SymptomSuspect area
Engine will not start or struggle to startVapor hose damaged or disconnected
Engine struggles to startMalfunction of the Purge Control Solenoid Valve
Rough idle or engine stallsVapor hose damaged or disconnected
Malfunction of the PCV valve
Rough idleMalfunction of the Evaporative Emission Control System

Schematic Diagrams

- Schematic Diagram

Components and Components Location

- Components Location

1. Canister
2. Purge Control Solenoid Valve (PCSV)
3. Fuel Level Sensor (FLS)
4. Fuel Tank Air Filter
5. Catalytic converter (WCC)
6. Catalytic converter (UCC)
7. Vapor Tube (Canister ↔ Intake Manifold)
8. Vapor Hose (Canister ↔ Fuel Tank)
9. Ventilation Hose (Canister ↔ Atmosphere)


1. Canister
4. Fuel Tank Air Filter		2. Purge Control Solenoid Valve (PCSV)

3. Fuel Level Sensor (FLS)5. Catalytic converter (WCC)

6. Catalytic converter (UCC)

7. Vapor Tube (Canister ↔ Intake Manifold)
8. Vapor Hose (Canister ↔ Fuel Tank)
9. Ventilation Hose (Canister ↔ Atmosphere)


Evaporative Emission Control System ➤

Exhaust Emission Control System ➤

Cruise Control System

Evaporative Emission Control System

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: General Service Information

- General Service Information Protection of the VehicleAlways be sure to cover fenders, seats, and floor areas prior to beginning work.     • The support rod must be inserted into the hole near the edge of the hood whenever you inspect the engine compartment to prevent the hood from falling and causing possible injury. • Make sure that the support rod has been released prior to closing the hood.

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