Hyundai Elantra: Emission Control System / General Information

Hyundai Elantra AD (2016-2020) Service Manual / Emission Control System / General Information

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.

Specifications

Purge Control Solenoid Valve (PCSV)

? Specification

Item	Specification
Coil Resistance (?)	22.0 ~ 26.0 [20°C(68°F)]

Fuel Tank Pressure Sensor (FTPS)

? Type: Piezo-Resistive Pressure Sensor

? Specification

Pressure [kPa (kgf/cm?, in H2O)]	Output Voltage (V)
-6.67 (-0.068, -26.8)	0.5
0	2.5
+6.67 (0.068, 26.8)	4.5

Canister Close Valve (CCV)

? Specification

Item	Specification
Coil Resistance (?)	19.5 ~ 22.5 [20°C(68°F)]

Tightening Torques

Item	kgf.m	N.m	lb-ft
Positive crankcase ventilation valve installation	0.2 ~ 0.3	1.96 ~ 2.94	1.45 ~ 2.17
Canister installation bolt/nut	2.0 ~ 3.0	19.6 ~ 29.4	14.5 ~ 21.7

Troubleshooting

Symptom	Suspect area
Engine will not start or hard to start	Vapor hose damaged or disconnected
Engine hard to start	Malfunction of the Purge Control Solenoid Valve
Rough idle or engine stalls	Vapor hose damaged or disconnected
Rough idle or engine stalls	Malfunction of the PCV valve
Rough idle	Malfunction of the Evaporative Emission Control System
Excessive oil consumption	Positive crankcase ventilation line clogged

Schematic Diagrams

Schematic Diagram

Components and Components Location

Components Location

1. PCV valve
2. Canister
3. Purge control solenoid valve (PCSV)
4. Fuel tank pressure sensor (FTPS)

5. Canister close valve (CCV)
6. Fuel level sensor (FLS)
7. Fuel tank air filter
8. Catalytic converter

1. PCV Valve	2. Canister

3. Purge Control Solenoid Valve (PCSV)	4. Fuel Tank Pressure Sensor (FTPS)

5. Canister Close Valve (CCV) 7. Fuel Tank Air Filter	6. Fuel Level Sensor (FLS)

8. Catalytic Converter (WCC)	8. Catalytic Converter (UCC)

Emission Control System

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