Hyundai Tucson (NX4) 2022-2025 Service Manual / Body Electrical System / Seat Electrical / Air Ventilation Seat

Hyundai Tucson: Seat Electrical / Air Ventilation Seat

- Component Location

1. Air ventilation seat blower
2. Air ventilation seat control unit
3. Air ventilation seat duct

- Components

Pin	Connector A	Connector B
1	IGN 1	Ventilation heater battery (+)
2	Blower power_LH	Heater power_LH
3	Blower speed_LH	Heater power_RH
4	Blower RPM input_LH	-
5	-	Heater ground_LH
6	-	Ventilation heater ground
7	CAN LOW	Ventilation heater battery (+)
8	CAN HIGH	-
9	-	-
10	LIN	-
11	-	Heater ground_RH
12	Blower ground_LH	Ventilation heater ground
13	IGN 2
14	Blower power_RH
15	Blower speed_RH
16	Blower RPM input_RH
17	-
18	-
19
20	NTC (+)_LH
21	NTC (+)_RH
22	NTC (-)_RH
23	NTC (-)_LH
24	Blower ground_RH

- Removal Cushion Blower

1.Remove the front seat assembly.(Refer to Body - "Front Seat Assembly")

2.Remove the cushion blower(A) after loosening the disconnecting the connector.

Air Duct

1.Remove the front seat back cover.(Refer to Body - "Front Seat Back Cover")

2.Remove the air duct (A) after loosening mounting screws.

Air Ventilation Unit

1.Remove the front seat assembly.(Refer to Body - "Front Seat Assembly")

2.Remove the air ventilation unit (A) after loosening mounting screws.

3.Remove the air ventilation unit (A) after disconnecting unit connector.

- Installation Cushion Blower

1.Install the cushion blower.

2.Install the front seat assembly.

Air Ventilation Unit

1.Install the air ventilation unit.

2.Install the front seat assembly.

Air Duct

1.Install the air duct.

2.Install the front seat back cover.

- Inspection Diagnosis mode

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

2.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.

3.After entering the diagnosis mode, you can check what failed by checking the blinking LED.[Ventilation & Heater Switch]

Failure indicator		Inspection items	Detailed inspections
	[Seat heater LED] High : OFF Middle : FLASHING Low : OFF	NTC (Disconnector)	1) NTC (disconnector) 2) Disconnection or missing connector of NTC
	[Seat heater LED] High : OFF Middle : OFF Low : FLASHING	NTC (Short)	1) NTC terminal short
	[Seat heater LED] High : OFF Middle : FLASHING Low : FLASHING	Power disconnection of seat heating wire (Disconnector)	1) Disconnection or missing connector of heating seat power line
	[Seat heater LED] High : FLASHING Middle : FLASHING Low : FLASHING	Short circuit of seat heating wire power (Short)	1) Short circuit of seat heating wire power (short)
	[Ventilation seat LED] High : OFF Middle : FLASHING Low : FLASHING	Power disconnection of ventilation blower	1) Disconnection or missing connector of ventilation power line 2) Disconnection or missing connector of ventilation signal line
	[Ventilation seat LED] High : FLASHING Middle : FLASHING Low : FLASHING	Short circuit of ventilation blowerpower (short)	1) Shor circuit of ventilation blower power (Short)

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

5.The ventilating seat unit will record the malfunctioning that occurred.

6.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.

7.Pressing the IGN OFF button will end the diagnosis mode for the ventilating seat.

8. You can check wheter the ventilating 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 Switch

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