ALWAYS use the Floor Mat Anchors to attach the front floor mats to the vehicle. The anchors on the front floor carpet keep the floor mats from sliding forward.
WARNING
The following must be observed when installing ANY floor mat to the vehicle.
IMPORTANT - Your vehicle was manufactured with driver’s side floor mat anchors that are designed to securely hold the floor mat in place. To avoid any interference with pedal operation, HYUNDAI recommends that the HYUNDAI floor mat designed for use in your vehicle be installed.
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 Service Manual: Heater & A/C Control Unit (Manual) Components and Components Location
Components
Connector [A]
Pin NOFunctionPin NOFunction1ILL+ (TAIL)21Detent OUT (+)2Sensor REF (+5V)22HTD3Mode control actuator (Vent)23Rear defog switch4Mode control actuator (Defrost)24C_CAN High5Mode control actuator (Feedback)25C_CAN Low6Intake actuator (Fresh)26ECV+7Intake actuator (Recircula ...