Hyundai Sonata LF Quiz
Body Electrical System

Ventilated Seat Repair Procedures

In this manual: Body Electrical System
General Information — 9Engine Mechanical System — 90Engine Electrical System — 58Emission Control System — 24Engine Control System/Fuel System — 114Drive Shaft and Axle — 15Suspension System — 35Steering — 19Restraints — 50Brake System — 54Body (Interior and Exterior) — 213Body Electrical System — 241Heating, Ventilation, and Air Conditioning — 56DCT (Dual Clutch Transmission) System — 52
26steps
~156min
4/5difficulty
Done 0 of 26

Removal

[Fan]
  1. Disconnect the negative (-) battery terminal.
  2. Remove the front seat. (Refer to Body - "Front Seat Assembly")
  3. Remove the lower cover assembly. (Refer to Body - "Front Seat Cushion Cover")
  4. Remove the blower fan (A) after removing the retaining clip (B) and screws.
  5. Remove the front seat back panel. (Refer to Body - "Front Seat Back Cover")
  6. Remove the duct (A) after removing the screws.
  7. Disconnect the negative (-) battery terminal.
  8. Remove the front seat. (Refer to Body - "Front Seat Assembly")
  9. Remove the screws securing the ventilated seat unit.
  10. Remove the ventilated seat unit (A) after disconnecting the connectors (B).
[Ventilated Seat]

Installation

[Fan]
  1. Install the air duct.
  2. Install the front seatback.
  3. Install the blower fan.
  4. Install the front seat assembly.
  5. Connect the negative (-) battery terminal.
  6. Install the ventilated seat unit.
  7. Install the front seat assembly.
  8. Connect the negative (-) battery terminal.
[Ventilated Seat]

Inspection

The ventilated seat consists of three units: the ventilated seat assembly, the input switch, and the blower for output. Diagnostic Mode
  1. You can enter diagnostic mode by turning on the seat ventilation button.
  2. You can enter diagnostic mode by referring to the timing chart and description below.
    A. Press IGN ON while pressing the seat ventilation button after IGN OFF.
    B. Keep pressing IGN ON for more than two seconds, then press it twice within five seconds.
    C. The LED indicates that the driver and passenger seats will blink in order from low, medium to high.
  3. After entering diagnostic mode, you can check the malfunction by the blinking LED.
    Malfunction Indicator Lamp LED blinks Check Items Detailed Checks
    		Seat heater wire power short (short to ground)
    1. Seat heater wire power short (short to ground)
    		Seat heater wire power open (disconnection)
    1. Open or disconnected seat heater power line connector
    		NTC (open)
    1. NTC (open)
    2. Open or disconnected NTC connector
    		NTC (short)
    1. NTC terminal short
    		Ventilation fan power open
    Ventilation fan signal line short
    1. Open or disconnected ventilation power supply line connector
    2. Open or disconnected ventilation signal line connector
    		Ventilation fan power wire short to ground (short circuit)
    1. Ventilation fan power wire short to ground (short circuit)
    		Ventilation fan signal line ground short and short
    1. Ventilation fan signal line ground short and short
    		Ventilation fan signal line power short
    1. Ventilation fan signal line power short
  4. You can check for a failure by observing the LED blinking pattern.
  5. The ventilated seat unit will store the malfunction that has occurred.
  6. If you press the seat heater button for more than five seconds, the memory malfunction LED will blink four times and the stored memory will be deleted.
  7. Pressing the IGN OFF button will end the ventilated seat diagnostic mode.
  8. You can check whether the seat ventilation system operates correctly after turning on the ignition. If you want to check the trouble code, refer to Procedure 2 above.

Test yourself

A quick Hyundai Sonata LF quiz: every answer comes with an explanation and a link to the manual page.