Kia Optima DL3: Seat Electrical / Relaxion Comfort Seat

Kia Optima DL3 2019-2025 Service and Repair Manual / Body Electrical System / Seat Electrical / Relaxion Comfort Seat

Components and components location

Component Location

1. Relaxion comfort switch
2. Walk-in switch

3. Relaxion comfort seat unit (RCSU)

Schematic diagrams

Connector and Terminal Function

Pin	Function
Pin	Connector A	Connector B
1	Battery (+)	Slide motor switch (Forward)
2	Slide motor (Forward)	Slide motor switch (Backward)
3	Slide motor (Backward)	Relaxion comfort switch (Forward)
4	Recline motor (Forward)	Relaxion comfort switch (Backward)
5	Recline motor (Backward)	Rear height motor switch (Up)
6	Ground	Rear height motor switch (Down)
7	Battery (+)	Relaxion comfort switch
8	-	Return switch
9	Rear height motor (Up)	-
10	Rear height motor (Down)	-
11	-	Sensor power
12	Ground	IGN2
13		IGN1
14		ECU (Battery +)
15		Walk-in switch Slide (Forward)
16		Walk-in switch Slide (Backward)
17		Walk-in switch Recline (Forward)
18		Walk-in switch Recline (Backward)
19		Walk-in relaxion comfort switch
20		Walk-in return switch
21		ECU (Ground)
22		-
23		-
24		Limit set power
25		Slide motor sensor
26		Recline motor sensor
27		Rear height motor sensor
28		Virtual limit set switch

Repair procedures

Removal

Walk-in Switch

1.	Remove the walk-in switch. (Refer to Seat Electrical - "Walk-in Switch")

Relaxion Comfort Switch

1.	Remove the relaxion comfort switch. (Refer to Seat Electrical - "Power Seat Control Switch")

Relaxion Comfort Seat Unit (RCSU)

1.	Disconnect the negative battery terminal.

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

3.	Loosen the occupant detection sensor mounting screws (A).

4.	Remove the occupant detection sensor (B) by disconnecting the connector (A).

5.	Disconnect the side airbag connector (B) by removing the fixing clip (A).

6.	Remove the relaxion comfort seat unit fixing clips (A).

7.	Disconnect the relaxion comfort seat unit connectors (A).

8.	Loosen the relaxion comfort seat unit mounting screws (A).

9.	Remove the relaxion comfort seat unit (A).

Installation

1.	Install in the reverse order of removal.

❮Walk-in Switch

Components and components location Component Location 1. Walk-in switch Repair procedures Removal When prying with a flat-tip screwdriver or use a prying trim tool, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.

Smart Key System❯

Specifications Specifications Smart Key Unit Items Specification Rated voltage DC 12 V Operation voltage DC 9 - 16 V Operation temperature -40 to 185°F (-40 to 85°C) RF Receiver Items Specification Frequency 433.

Other information:

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Schematic diagrams Connector and Terminal Function Pin Function 1 B-CAN (Low) 2 B-CAN (High) 3 Ground (Assist safety) 4 Assist safety 5 LIN (For IMS)