Hyundai Sonata LF 2014-2019 Service Manual: Occupant Classification Sensor (OCS) Repair procedures
Removal
OCS ECU
1.
Disconnect the battery negative cable, and wait for at least three minutes before beginning work.
2.
Remove the front passenger seat assembly.
(Refer to Body - "Front Seat Assembly")
3.
Disconnect the OCS ECU connector (A).
4.
Remove the OCS mounting bolts (B)
...
Hyundai Sonata LF 2014-2019 Owners Manual: Good Braking Practices
WARNING
Whenever leaving the vehicle or parking, always come to a complete stop and
continue to depress the brake pedal. Move the shift lever into the P (Park) position,
then apply the parking brake, and place the ignition switch in the OFF position.
Vehicles with the parking brake not fully engag ...