Kia Optima: Seat Electrical / Ventilated and Heated Seat

Kia Optima DL3 2019-2021 Service and Repair Manual / Body Electrical System / Seat Electrical / Ventilated and Heated Seat

Schematic diagrams

Connector and Terminal Function

Pin	Function
Pin	Connector A	Connector B
1	Driver heater ground (-)	Driver blower speed (+)
2	Passenger heater ground (-)	-
3	Driver cushion heater power (+)	CAN (Low)
4	Driver back heater power (+)	CAN (High)
5	Passenger cushion heater power (+)	-
6	Passenger back heater power (+)	LIN
7	ECU (Ground)	Detent
8	ECU (Ground)	IGN1
9		Driver blower speed
10		Passenger blower speed
11		Illumination (-)
12		Driver NTC (-)
13		Passenger NTC (-)
14		-
15		-
16		-
17		-
18		-
19		-
20		IGN2
21		-
22		Driver NTC (+)
23		Passenger NTC (+)
24		-

Repair procedures

Removal

Ventilation Seat Unit

1.	Remove the heater unit. (Refer to Seat Electrical - "Heated Seats Only")

Ventilation Seat Blower

1.	Disconnect the negative battery terminal.

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

3.	Disconnect the ventilation seat blower connector (A).

4.	Remove the ventilation seat blower (B) by removing the clips.

Installation

1.	Install in the reverse order of removal.

Ventilated and Heated Seat Switch

Schematic diagrams Connector and Terminal Function [Front Seat] [Ventilation+Heater Type / Non-Heater Type] Pin Function Pin Fun ...

Lumbar Support System

Repair procedures Inspection 1. Remove the front seat back. (Refer to Body - "Front Seat Back Cover") 2. Disconnect the connector (A). ...

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