Seat Heater Repair Procedures

Inspection

1. 1
   Check the continuity and measure the resistance between terminals No. 3 and No. 6.

   

   Standard value Driver/Assistant (cushion + back): 2.00Ω±10%/23 °C 1.79Ω±10%/23 °C
2. 2
   Turn on the seat heater after connecting the connector, then check the thermostat by measuring the seat surface temperature. Standard value 1st: cushion: 36±2 °C, back: 40±2 °C 2nd: cushion: 39±2 °C, back: 45±2 °C 3rd: cushion: 42±2 °C, back: 50±2 °C
3. 3
   You can enter diagnostic mode by turning the seat heater button on.
4. 4
   You can enter diagnostic mode by referring to the following description.

   • Press IGN ON while pressing the seat heater button from IGN OFF.
   • Keep pressing IGN ON for more than three seconds, then press again for more than three seconds within 2 seconds.
   • All LED indicators on the driver and passenger seat buttons will blink once.
5. 5
   After entering diagnostic mode, you can check the failed item by the blinking LED. [Driver/Passenger Seat Heater]

   

   Failure Indicator	Check Items	Detailed Checks
   Low: BLINKING Medium: BLINKING High: ON	Low Voltage Detection	IGN1 voltage 8.5 V or less
   	Overvoltage Detection	IGN1 voltage 16.5 V or more
   Low: OFF Medium: BLINKING High: ON	Fuse (Short)	Open or disconnected seat heater line B(+) connector
   Low: OFF Medium: ON High: BLINKING	NTC/Heater (Disconnect)	Heating Mat Disconnect NTC Wiring Disconnect (+) NTC Wiring Disconnect (-) Heater Wiring Disconnect (+) Heater Wiring Disconnect (-)
   Low: FLASHES Mid: ON High: OFF	NTC/Heater (Short)	NTC (+)/ NTC (-) Short
   Low: OFF Medium: ON High: BLINKING		NTC (+)/ Heater (+) Short Circuit
   Low: FLASHES Mid: ON High: OFF		NTC (+)/ Heater (-) Short Circuit Heater (+)/ Heater (-) Short Circuit Heater (+)/ NTC (-) Short Circuit NTC (-)/ NTC (-) Wiring Short Circuit
   Low: OFF Medium: ON High: BLINKING		NTC (+)/Heater (+) Wiring Short Circuit
   Low: FLASHES Mid: ON High: OFF		NTC (+)/Heater (-) Wiring Short Circuit Heater (+)/ Heater (-) Wiring Short Circuit Heater (-)/ NTC (-) Wiring Short Circuit
   Low: FLASHES Mid: ON High: FLASHES	Loss of Temperature Feedback	Target temperature not reached within 40 minutes

6. 6
   You can check for a failure by observing the LED blinking pattern.
7. 7
   Pressing the IGN OFF button ends the diagnostic mode for the seat heater.
8. 8
   The seat heater system can be checked after turning the ignition on. To check the trouble code, refer to Procedure 2 above.