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In order for the FCA system to operate properly, always make sure the sensor or sensor cover is clean and free of dirt, snow, and debris. Dirt, snow, or foreign substances on the lens may adversely affect the sensing performance of the sensor.
✽ NOTICE

When the sensor is covered or the sensor lens is dirty with foreign substances, such as snow or rain, the FCA system may not be able to detect vehicles or pedestrians. In this case, a warning message ("Forward Collision Avoidance Assist (FCA) system disabled. Radar blocked") will appear to notify the driver. Remove the foreign substances to allow the FCA system to function.
Remove any dirt, snow, or debris and clean the radar sensor cover before operating the FCA system.
The FCA may not properly operate in an area (e.g. open terrain), where any substances are not detected after turning ON the engine.
Kia Stinger (CK) 2018-2023 Owner's Manual: Smart Cruise Control (Stop & Go) (SCC) Unit-Radar
Specifications Specification Item Specification Power supply(V) 12 Operation voltage (V) 9 - 16 Description and operation Description The smart cruise control unit is installed on the front right-hand side of the chassis. A radar sensor is embedded in the front section of the unit.Service data Service data Item Specification Master cylinder Type Tandem Cylinder I.D. Ø 23.81 mm (0.937 in) Piston stroke 36±1 mm (1.41 ± 0.039 in) Fluid level switch Provided Brake booster Type 8+8" Tandem Boosting ratio 9 : 1 Front disc brake (17 in) Type Ventilated disc Disc O.