Kia Niro: Seat Electrical / Air Ventilation Seat Repair procedures

Kia Niro 2017 (DE HEV) Service Manual / Body Electrical System / Seat Electrical / Air Ventilation Seat Repair procedures

Removal

[Ventilation Blower]

1.	Disconnect the negative (-) battery terminal.

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

3.	Disconnect the ventilation blower connector (A).

4.	Remove the ventilation blower ducts (A) after removing the screw and clips.

5.	Remove the blower fan (A) after removing the screws.

[Ventilation Seat Unit]

1.	Disconnect the negative (-) battery terminal.

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

3.	Remove the front seat cushion cover. (Refer to Body - "Front Seat Cushion Cover")

4.	Remove the front seat cushoin panel (A) after loosening the mounting bolts.

5.	Disconnect the ventilation seat unit connectors (A).

6.	Remove the ventilation seat unit (A) after loosening the mounting screws.

Installation

[Ventilation Blower]

1.	Install the blower fan.

2.	Install the blower 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 cushion panel.

3.	Install the front seat cushion cover.

4.	Install the assist front seat assembly.

5.	Connect the negative (-) battery terminal.

Inspection

Ventilation Seat Diagnostic Mode

Ventilated seat is largely composed of seat ventilation unit for control, switch for input and blower for output.

The diagnostic mode for checking normal operation of these three components has the following functions.

1.	Operate seat heater switch to enter diagnostic mode.

2.	Enter diagnostic mode by referring to below timing chart and explanation.

Press seat heater switch as below.

(1)	Press seat heater switch for over 3 seconds.

(2)	Release the switch for less than 3 seconds, and press again for 1.5-3 seconds.

(3)	Release the switch for less than 3 seconds, and press again for over 3 seconds.

Diagnostic mode will start immediately after 3 LED lamps of seat heater switch (Low, Mid, High) blink once.

(1)	In self-diagnostic mode, only the seat heater switch LED lamps will operate.

(2)	If two or more errors are detected, the lamps will blink in sequence with intervals of 2 seconds for each error code.

After entering diagnostic mode, check LED blinking status to check errors.

Failure Indication

Blinking of LED

Inspection Item

Cause of Failure

Detect low voltage

Low voltage compared to operating voltage range

Detect over voltage

Over voltage compared to operating voltage range

Disconnected fuse

Disconnected B+ fuse

Disconnected IGN2 fuse

Short in NTC/HEATER MAT

1)	Faulty NTC element

2)	Disconnected heater mat

3)	Disconnected heater + wiring

4)	Disconnected heater system NTC (Over 4.9V)

Short in NTC/HEATER MAT

1)	Short between controller connector terminal and NTC

2)	Short between controller connector terminal and heater

3)	Short in heater system NTC wiring

4)	Short in heater system heater + wiring

Detect loss of temperature

Target temperature not reached in 40 minutes

Disconnected ventilation blower power

Disconnected blower power wiring

Short in ventilation blower power

Short in blower power wiring

Disconnected ventilation blower speed signal

Disconnected blower speed signal

Short in ventilation blower speed signal

Short in ventilation blower speed signal (VCC)

Short in ventilation blower speed signal

Short in ventilation blower speed signal (GND)

Disconnected ventilation blower rpm signal

isconnected ventilation blower rpm signal

Short in ventilation blower rpm signal

Short in ventilation blower rpm signal (VCC)

Short in ventilation blower rpm signal

6.	Inspect cause of failure indicated by LED status.

7.	Trouble code will be recorded by seat ventilation unit.

8.	When the passenger side seat heater switch is pressed for over 5 seconds, the LED will blink 4 times and trouble code will be deleted.

9.	Switch "OFF" ignition to exit diagnostic mode of ventilated seat.

10.	Switch "ON" ignition and check that seat ventilation system works properly. To check trouble code, refer to step 2 again.

Air Ventilation Seat Schematic diagrams

Circuit Diagram ...

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