Hyundai i-30: Seat Electrical / Air Ventilation Seat

Hyundai i30 (PD) 2018-2024 Service Manual / Body Electrical System / Seat Electrical / Air Ventilation Seat

Components and components location
Component Location

1. Ventilation seat blower.
2. Ventilation seat unit (Assist seat only).

Schematic diagrams
Circuit Diagram

Air Ventilation Unit Connector

No
Connecter A
Connecter B
Connecter C
1
Seat vent unit IGN 1
Driver vent switch led (Low)
vent / heater power
2
Driver blower power
Driver vent switch led (Mid)
Driver heater power
3
Driver blower speed
Driver vent switch led (High)
Driver heater ground
4
Driver RPM input
Driver NTC (+)
Driver / Assist, Vent / Heater ground
5
Driver heater switch
-
vent / heater power
6
Driver vent switch
Illumination (-)
-
7
Illumination (+)
Driver NTC (-)
Assist heater power
8
Driver heater LED (Low)
Driver blower ground
-
9
Driver heater LED (Mid)
Driver vent led (Low)
Assist heater ground
10
Driver heater LED (High)
Driver vent led (Mid)
Driver / Assist, Vent / Heater ground
11
Vent seat unit IGN 2
Driver vent led (High)

12
Assist blower power
Assist NTC (+)
13
Assist blower speed
-
14
Assist blower RPM input
-
15
Assist heater switch
Assist NTC (-)
16
Assist vent switch
Assist blower ground
17
Detent

18
Assist heater LED (Low)
19
Assist heater LED (Mid)
20
Assist heater LED (High)

Repair procedures
Removal
[Ventilation Blower]
1.
Disconnect the negative (-) battery terminal.
2.
Remove the front seat.
(Refer to Body - "Front Seat Assembly")
3.
Remove the blower duct (A).

4.
Remove the blower FAN (A) after removing the screws.

[Ventilation Seat Unit]
1.
Disconnect the negative (-) battery terminal.
2.
Remove the front assist seat.
(Refer to Body - "Front seat Assembly")
3.
Loosen the screws from the ventilation seat unit (A).

4.
Remove the ventilation seat unit (A) after disconnecting the connectors (B).

Installation
[Ventilation Blower]
1.
Install the blower fan.
2.
Install the duct.
3.
Install the front seat assembly.
4.
Connect the negative (-) battery terminal.
[Ventilation Seat Unit]
1.
Install the ventilation seat unit.
2.
Install the front seat assembly.
3.
Connect the negative (-) battery terminal.
Inspection
Ventilating seat consists of three units : the ventilating seat unit for control, switch for input and and blower for output.
Diagnosis mode
1.
You can enter the diagnosis mode by turning the heater seat button on.
2.
You can enter the diagnosis mode by referring to following description.
3.
Press the heating wire switch as shown 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.

4.
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.

5.
After entering the diagnostic mode, check the LED status to identify the error.

Failure Indicator
LED (Flashing)
Inspection Items
Detailed Inspections



Low voltage detection

Low voltage that deviates from the operating voltage range was supplied.

Over voltage detection

Overvoltage that deviates from the operating voltage range was supplied.

Fuse (Short)


B+ fuse disconnection




IGN2 fuse disconnection


NTC/HEATER MAT (Short)
1)
NTC element failure
2)
Heater mat disconnection
3)
Heater+ wiring disconnection
4)
Heater system NTC disconnection (4.9 V or higher)

NTC/HEATER MAT (Disconnector)
1)
Short-circuit between the controller connector terminal and NTC
2)
Short-circuit between the controller connector terminal and heater
3)
Short-circuit in the heater system NTC wiring
4)
Short-circuit in the heater system heater+ wiring

Target temperature not reached
Target temperature not reached within 40 minutes

Short circuit of Ventilation blower power line
Short circuit of ventilation blower power line (short)

Power disconnection of ventilation blower
Disconnection or missing connector of ventilation power line

Short circuit of ventilation blower speed signal
Short circuit of ventilation blower speed signal (short)

Disconnection or missing connector of ventilation blower speed signal
Disconnection or missing connector of ventilation blower speed signal (VCC)

Disconnection or missing connector of ventilation blower speed signal
Disconnection or missing connector of ventilation blower speed signal (GND)

Short circuit of ventilation blower RPM signal (short)
Short circuit of ventilation blower RPM signal (short)

Disconnection or missing connector of ventilation blower RPM signal
Disconnection or missing connector of ventilation blower RPM signal (GND)

Disconnection or missing connector of ventilation blower RPM signal
Disconnection or missing connector of ventilation blower RPM signal (GND)

6.
You can check the malfunctioning by checking the blinking LED.
7.
The failure data is recorded to the memory by the ventilation seat unit.
8.
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.
9.
Pressing the IGN OFF button will end the diagnosis mode for the heater seat.
10.
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.

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