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Hyundai Tucson: Seat  heater (Ventilation)

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Body Electrical System / Seat Electrical / Seat  heater (Ventilation)

Components

  1. Seat cushion heater (Ventilation)
  2. Seat heater (Ventilation) unit
  3. Seat back heater (Ventilation)

Circuit Diagram

Inspection

Inspection

Driver/Passenger

  1. Check for continuity and measure the resistance between terminals.

  1. Operate the seat heater after connecting the connector, and then check the thermostat by measuring the temperature of seat surface.

Second Line Seat

Second Line Seat

  1. Check for continuity and measure the resistance between terminals.

Cushion

Back

Back

Cushion

Cushion

Back

Back

  1. Operate the seat heater after connecting the connector, and then check the thermostat by measuring the temperature of seat surface.

Diagnosis mode

Diagnosis mode

  1. Enter the diagnostic mode referring to below description.
  • In failure mode, press the ventilation seat button for 4 seconds and release it.
  • Press the ventilation seat button for 2 seconds and release it.
  • Lastly, press the ventilation seat button for 4 seconds and release it.
  • When entering the failure mode, the LED of the ventilation seat button turns ON/OFF/blinks at each stage.
  1. After entering the diagnosis mode, you can check what failed by checking the blinking LED.
  2. The table below indicates the failure based on priority, upper item means higher priority.
  3. If more than one failure is detected, higher priority failure is displayed through the LED flashing pattern.
  4. Lower priority failure will be displays if higher priority failure is reset.

Heater Switch

Driver/Passenger

Driver/Passenger

Second line seat heater

Second line seat heater

  1. If you press the seat heater button for more than five seconds, the LED for malfunctioning memory will blink four times and the recorded memory will be deleted.
  2. Pressing the IGN OFF button will end the diagnosis mode for the seat.
  3. You can check whether the heating seat system works properly after turning the IGN ON. If you want to check the error code, you can refer to the procedure of 2 above.

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