Hyundai Tucson: Introduction of Quick Brake Warning System (ESS)

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Brake System / ESC (Electronic Stability Control) System / Introduction of Quick Brake Warning System (ESS)


In case of quick brake by driver, the brake lamp or turn signal is blinked to warn against the vehicle at rear.

  1. Basic function (Blinking the brake lamp/emergency lamp)
  • Operation condition : In case of quick brake or operation of ABS above in a certain speed
  • Releasing condition : In case of stopping the quick brake or releasing the ABS operation
  1. Additional function (Blinking the turn signal)
  • Operation condition : In case of quick brake in low speed
  • Releasing condition : Releasing at the start of driving

System Configuration

System Configuration

ESS Circuit Diagram

ESS Circuit Diagram

Body (Interior and Exterior)


     Body (Interior and Exterior)

     General Information

    Troubleshooting Specifications Tightening Torque Special Service Tools


    Component Location Fender assembly Replacement WARNING When removing the fender, wrap protective tape around a screwdriver or remover not to damage components Put on gloves to prevent hand injuries Remove the front bumper


      Repair procedures

    Compession Pressure Inspection WARNING If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure. Start the engine and turn the coolant temperature to 80 - 95 ºC and stop. Remove the e

     Configuration of eCall Controller

    Input button & Indicator SOS button : Press the button to place a call to the call center. LED indicator lamp : The red and green LEDs turn on for 3 seconds after the ACC is on and stay turned off in standby until the key is turned off