Hyundai Sonata LF: Emission Control System / General Information

Hyundai Sonata LF 2014-2019 Service Manual / Emission Control System / General Information

Description and Operation

Description
Emissions Control System consists of three major systems.
•
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).
•
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.
•
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

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 (?)
19.8 ~ 21.8 [20°C(68°F)]

Tightening Torques
Item
kgf.m
N.m
lb-ft
Positive Crankcase Ventilation (PCV) Valve installation
0.8 ~ 1.2
7.8 ~ 11.8
5.8 ~ 8.7
Canister installation bolt
0.4 ~ 0.6
3.9 ~ 5.9
2.9 ~ 4.3

Troubleshooting

Troubleshooting
Symptom
Suspect area
Engine will not start or stuggle to start
Vapor hose damaged or disconnected
Engine stuggle to start
Malfunction of the Purge Control Solenoid Valve
Rough idle or engine stalls
Vapor hose damaged or disconnected
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 Sender (FLS)
7. Fuel Tank Air Filter
8. Catalytic Converter (WCC+UCC)

1. PCV Valve
2. Canister

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

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

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


    Emission Control System

    ..

    Crankcase Emission Control System

    Schematic Diagrams Schematic Diagram Repair procedures Inspection 1. After disconnecting the vapor hose from the PCV valve, remove the PCV valve...

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