Hyundai Kona: Seat Electrical / Seat Heater Repair procedures

Hyundai Kona (OS) 2018-2024 Service Manual / Body Electrical System / Seat Electrical / Seat Heater Repair procedures

Inspection

Front Seat Heater

Check for continuity and measure the resistance between terminals No 3 and No 6.

Standard value

Driver / Assists (cushion + back) :

2.00Ω±10%/23°C (non Air ventilation seat)

1.79Ω±10%/23°C (Air ventilation seat)

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

Standard value

1st : cushion : 36±2°C, back : 40±2°C

2st : cushion : 39±2°C, back : 45±2°C

3st : cushion : 42±2°C, back : 50±2°C

Seat Heater Unit Diagnosis Mode

1.	You can enter the diagnosis mode by turning the seat heater button on.

You can enter the diagnosis mode by referring to following description.

•	Push IGN ON while pressing the seat heater button from IGN OFF.

•	Keep pressing IGN ON for more than three seconds before pressing it once againe for more than three seconds within 2 seconds.

•	All LED indicators on the driver and passenger seat button will blink 1 times.

After entering the diagnosis mode, you can check what failed by checking the blinking LED.

[Driver / Passenger Seat Heater]

Failure Indicator	Inspection Items	Detailed Inspections
Low : FLASING Mid : FLASING High : ON	Low voltage detection	IGN1 voltage of 8.5 V or lower
Low : FLASING Mid : FLASING High : ON	Over voltage detection	IGN1 voltage of 16.5 V or lower
Low : OFF Mid : FLASING High : ON	Fuse (Short)	Disconnection or missing connector of heating seat B(+) line
Low : OFF Mid : ON High : FLASING	NTC/Heater (Disconnector)	Heater mat disconnector NTC (+) wiring disconnector NTC (-) wiring disconnector Heater (+) wiring disconnector Heater (-) wiring disconnector
Low : FLASING Mid : ON High : OFF	NTC/Heater (Short)	NTC (+)/ NTC (-) Short
Low : OFF Mid : ON High : FLASING		NTC (+)/ Heater (+) Short
Low : FLASING Mid : ON High : OFF		NTC (+)/ Heater (-) Short Heater (+)/ Heater (-) Short Heater (+)/ NTC (-) Short NTC (-)/ NTC (-) Short wiring Short
Low : OFF Mid : ON High : FLASING		NTC (+)/ Heater (+) wiring Short
Low : FLASING Mid : ON High : OFF		NTC (+)/ Heater (-) wiring Short Heater (+)/ Heater (-) wiring Short Heater (-)/ NTC (-) wiring Short
Low : FLASING Mid : ON High : FLASING	Loss of temperature feedback	Target temperature not reached within 40 minutes

4.	You can check the malfunctioning by checking the blinking LED.

5.	Pressing the IGN OFF button will end the diagnosis mode for the heater seat.

6.	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.

Seat Heater Schematic diagrams

Circuit Diagram [Front Seat Heater (Non-Air Ventilation)] ...

Seat Heater Switch Components and components location

Components [Front Seat] ...

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