Hyundai Sonata: Evaporative Emission Control System / Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Emission Control System / Evaporative Emission Control System / Repair procedures

Inspection

[System Inspection]

Disconnect the vapor hose from the intake manifold and connect a vacuum pump to the nipple on the intake manifold.

· At Cold Engine [Engine Coolant Temperature < 60°C(140°F)]

Engine Operating Condition	Applied Vacuum	Result
Idle	Min. 20 inHg (Min. 0.7 kgf/cm?, Min. 67.7 kPa)	Vacuum is held
3,000rpm	Min. 20 inHg (Min. 0.7 kgf/cm?, Min. 67.7 kPa)	Vacuum is held

Check the following points with applied vacuum at the purge control solenoid valve (PCSV).

· At Warmed Engine [Engine Coolant Temperature > 80°C(176°F)]

Engine Operating Condition	Applied Vacuum	Result
Idle	Min. 20 inHg (Min. 0.7 kgf/cm?, Min. 67.7 kPa)	Vacuum is held
Within 3 minutes after engine start at 3,000 rpm	Try to apply vacuum	Vacuum is released
In 3 minutes after engine start at 3,000 rpm	Min. 20 inHg (Min. 0.7 kgf/cm?, Min. 67.7 kPa)	Vacuum will be held momentarily, after which, it will be released

[PCSV Inspection]

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

2.	Disconnect the PCSV connector (A).

3.	Disconnect the vapor hose (B) which is connected to the intake manifold from the PCSV.

4.	After connecting a vacuum pump to the nipple, apply vacuum.

With the PCSV control line grounded, check the valve operation with battery voltage applied to the PCSV(Open) and removed(Closed).

Battery Voltage	Valve	Vacuum
Connected	Open	Released
Disconnected	Close	Maintained

Measure the coil resistance of the PCSV.

Specifications:

22.0 ~ 26.0? [20°C(68°F)]

[EVAP. Leakage Test]

1.	Select "Evap. Leakage Test".

2.	Proceed with the test according to the screen introductions.

Schematic Diagrams

Schematic Diagram Canister The Canister is filled with charcoal and absorbs evaporated fuel vapor from the fuel tank. The gathered fuel vapor in canister is drawn into the intake manifold by t ...

Canister Repair procedures

Removal 1. Turn the ignition switch OFF and disconnect the negative (-) battery cable. 2. Remove the fuel tank. (Refer to Engine Control / Fuel System - " Fuel Tank") 3. Disconnect th ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Injector Troubleshooting
Signal Waveform The three waveforms below are taken from the #1 and #4 injectors. The top waveform is from the high side (feed side) of the #1 and #4 injectors, while the middle waveform is from the low side (ground side) of the #1 injector and the bottom waveform is from the low side of ...

Hyundai Sonata LF 2014-2019 Service Manual: Front Seat Belt Retractor Components and Components Location
Component Location 1. Front seat belt retractor ...