2. GDS Data Analysis

WARNING: This page is about a different car, the 2017 Genesis G90. However, it is still accessible from the selected car via links, so may be relevant.

Analyze GDS data and check if there is anything wrong with the stop lamp switch.
1. Connect the GDS to the self-diagnosis connector.
2. Turn the spark switch on
3. Step on the brake pedal.
4. Inspect the "brake switch" category that displays the "sensor data" GDS.)
  Normal Waveform : The pressure sensor signal value will change according to the brake ON/OFF switch.
  
  Fig 1: Screen Display - GDS Data Analysis
  Courtesy of HYUNDAI MOTOR AMERICA