To release the EPB (Electronic Parking Brake), press the EPB switch in the following condition:
Make sure the Parking Brake Warning Light goes off.
To release EPB (Electronic Parking Brake) automatically:
1. Start the engine.
2. Fasten the driver’s seat belt.
3. Close the driver’s door, engine hood and trunk.
4. Depress the accelerator pedal while the shift lever is in D (Drive) or Manual shift mode.
The Parking Brake Warning Light should be turned off when the EPB is released.
If the Parking Brake Warning Light is still on even though the EPB has been released, have your vehicle checked by an authorized HYUNDAI dealer.
Information
NOTICE
When the EPB (Electronic Parking Brake) does not release:
Contact an authorized HYUNDAI dealer by loading the vehicle on a flatbed tow truck and have the system checked.
EPB (Electronic Parking Brake) may be automatically applied when:
Information
If the driver turns the engine off while Auto Hold is operating, EPB will be automatically applied. However, if you press the EPB switch within one second after the engine is turned off, the EPB will not be applied.
Hyundai Sonata LF 2014-2019 Service Manual: Cruise Control Switch Repair procedures
Inspection
[Measuring Resistance]
1.
Disconnect the cruise control switch connector from the control switch.
2.
Measure resistance between terminals on the control switch when each function switch is ON (switch is depressed).
Function switchTerminalResistanceSET -3 - 5550?±5%RES +3 - ...
Hyundai Sonata LF 2014-2019 Service Manual: Center Facia Upper Panel Components and Components Location
Component Location
1. Center Facia Upper panel assembly
...