Diagnosis Mode

You can enter the diagnosis mode by turning the heater seat button on.
You can enter the diagnosis mode by referring to following description.
Press the heating wire switch as shown in illustration below.
1. Press and hold the heating wire switch for 3 seconds or more.
2. Release the switch for 3 seconds or less and press and hold it again for 1.5-3 seconds.
3. Release the switch for 3 seconds or less and press and hold it again for 3 seconds or more.
Courtesy of HYUNDAI MOTOR AMERICA
When the vehicle enters the diagnostic mode, the three LEDs (Low, Mid, High) in the heating wire section blinks once for 0.5 seconds.
1. When the vehicle enters the self-diagnostic mode, LEDs only work as those for heating wire seat switches.
2. When two or more errors are detected, the LEDs sequentially blink at a 2-second interval for each error code.
Courtesy of HYUNDAI MOTOR AMERICA

After entering the diagnostic mode, check the LED status to identify the error.

Courtesy of HYUNDAI MOTOR AMERICA

You can check the malfunctioning by checking the blinking LED.
The failure data is recorded to the memory by the ventilation seat unit.
Press the heating wire seat switch on the passenger side for 5 seconds or more to make the LED blink four times and delete the failure data in the memory.
Pressing the IGN OFF button will end the diagnosis mode for the heater seat.
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 above (step 2).

Failure Indicator	LED (Flashing)	Inspection Items	Detailed Inspections
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Low voltage detection	Low voltage that deviates from the operating voltage range was supplied.
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Over voltage detection	Overvoltage that deviates from the operating voltage range was supplied.
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Fuse (Short)	B+ fuse disconnection
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Fuse (Short)	IGN2 fuse disconnection
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	NTC/HEATER MAT (Short)	NTC element failure Heater mat disconnection Heater+ wiring disconnection Heater system NTC disconnection (4.9 V or higher)
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	NTC/HEATER MAT (Disconnector)	Short-circuit between the controller connector terminal and NTC Short-circuit between the controller connector terminal and heater Short-circuit in the heater system NTC wiring Short-circuit in the heater system heater+ wiring
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Target temperature not reached	Target temperature not reached within 40 minutes
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Short circuit of Ventilation blower power line	Short circuit of ventilation blower power line (short)
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Power disconnection of ventilation blower	Disconnection or missing connector of ventilation power line
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Short circuit of ventilation blower speed signal	Short circuit of ventilation blower speed signal (short)
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Disconnection or missing connector of ventilation blower speed signal	Disconnection or missing connector of ventilation blower speed signal (VCC)
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Disconnection or missing connector of ventilation blower speed signal	Disconnection or missing connector of ventilation blower speed signal (GND)
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Short circuit of ventilation blower RPM signal (short)	Short circuit of ventilation blower RPM signal (short)
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Disconnection or missing connector of ventilation blower RPM signal	Disconnection or missing connector of ventilation blower RPM signal (GND)
Courtesy of HYUNDAI MOTOR AMERICA	Courtesy of HYUNDAI MOTOR AMERICA	Disconnection or missing connector of ventilation blower RPM signal	Disconnection or missing connector of ventilation blower RPM signal (GND)