Hyundai Accent (HC): Emission Control System

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

Contents:

Specifications ➤

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 ➤

Troubleshooting

Specifications

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: Blower Unit

- Component Location 1. Blower unit assembly - Components 1. Seal2. Intake duct case3. Intake actuator4. Intake door5. Intake lower case6. Blower upper case7. Blower unit pad8. Blower lower case9. Blower motor10. Air filter11. Air filter cover12. PWM Blower module - Replacement     When prying with a flat-tip screwdriver or use a prying trim tool, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Heater Unit

- Component Location 1. Heater unit assembly - Compoents 1. Heater core cover2. Heater core & seal assembly3. Heater case [LH]4. Mode control actuator5. Air guide [LH]6. Heater unit pad7. Deforster door assembly8. Vent door assembly9. Floor door assembly10. Temperature door assembly11. Lower case12. Drain hose13. Heater case [RH]14.

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