Hyundai i-30: Seat Electrical / Seat Heater

Hyundai i30 (PD) 2018-2025 Service Manual / Body Electrical System / Seat Electrical / Seat Heater

Components and components location

Component Location

Front Seat Heater

1. Seat heater unit (Assist seat only)
2. Front seat cushion heater

3. Front seat back heater

Front Seat Heater (Air Ventilation)

1. Air veneilation seat unit (Assist seat only)
2. Front seat cushion heater

3. Front seat back heater

Schematic diagrams

Circuit Diagram

[Front Seat Heater]

Repair procedures

Removal

Front Seat Heater Unit

1.	Disconnect the negative (-) battery terminal.

2.	Remove the front assist seat assembly. (Refer to body - "Front Seat Assembly")

3.	Remove the front seat heater unit after loosening the mounting screws and disconnecting the unit connectors.

Installation

Front Seat Heater Unit

1.	Install the front seat heater unit.

2.	Install the front assist seat.

Connect the negative (-) battery terminal.

•	Make sure that the connectors are plugged in properly.

•	Check the seat heater system for normal operation.

Inspection

Front Seat Heater

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

Standard value

Driver / Assists (cushion + back) : 1.76Ω±10%/23°C

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

HIGH : ON
MID : Flashing
LOW : Flashing

Low voltage detection

–	IGN1 voltage of 8.5 V or lower

Over voltage detection

–	IGN1 voltage of 16.5 V or lower

HIGH : ON
MID : Flashing
LOW : OFF

Fuse (Disconnector)

–	Disconnection in the IGN fuse

HIGH : Flashing
MID : ON
LOW : OFF

NTC (Disconnector)

–	HEATER CHSU/BACK Disconnection

–	Disconnection in the NTC (+) wiring

–	Disconnection in the NTC (-) wiring

–	Disconnection in the heating wire (+)

–	Disconnection in the heating wire (-)

High : OFF
MID : ON
LOW : Flashing

NTC (Short )

–	Short-circuit in the NTC (+) / NTC (-) wiring

–	Short-circuit in the NTC (+) / Heater (-) wiring

–	Short-circuit in the Heater (+) / Heater (-) wiring

–	Short-circuit in the Heater (+) / NTC (-) wiring

–	Short-circuit in the NTC (+) / NTC (-) wiring

–	Short-circuit in the NTC (+) / Heater (-) wiring

–	Short-circuit in the Heater (+) / Heater (-) wiring

HIGH : Flashing
MID : ON
LOW : OFF

–	Short-circuit in the NTC/heating wire (+)

HIGH : Flashing
MID : ON
LOW : Flashing

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.

Power Seat Control Switch

Schematic diagrams Circuit Diagram [Driver power seat switch] Repair procedures Inspection Seat Control Switch 1...

Components and components location Components [Front seat switch] 1. Driver seat heater switch 2. Assist seat heater switch Schematic diagrams Circuit Diagram [Front Seat Heater Switch(Driver)] [Front Seat Heater Switch(Assist)] Repair procedures Removal [Front Seat] 1...

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