Kia Forte: Seat Electrical / Seat Heater Unit

Kia Forte 2019-2020 (BD) Service Manual / Body Electrical System / Seat Electrical / Seat Heater Unit

Components and components location
Components
Front Seat Heater

1. Front seat heater unit
2. Front heat & ventilation unit
3. Front seat back heater
4. Front seat cushion heater

Rear Seat Heater

1. Rear seat heater unit
2. Rear seat cushion heater

Schematic diagrams
Circuit Diagram
Front Seat

No.
Connector A
1
Battery (+)
2
Battery (+)
3
RH seat heater (+)
4
RH seat heater indicator (Low)
5
RH seat heater indicator (Mid)
6
RH seat heater indicator (High)
7
RH seat NTC (+)
8
-
9
RH seat heater switch
10
-
11
RH NTC (-)
12
RH seat heater (-)
13
Ground
14
IGN1
15
IGN2
16
LH seat heater (+)
17
LH seat heater indicator (Low)
18
LH seat heater indicator (Mid)
19
LH seat heater indicator (High)
20
LH seat NTC (+)
21
-
22
LH seat heater switch
23
Detent
24
LH seat NTC (-)
25
LH seat heater (-)
26
Ground

[Ventilation Unit]

No.
Connector A
Connector B
Connector C
1
LH seat ventilation switch
NTC (-)
LH seat cushion heater power
2
RH seat ventilation switch
RH seat heater indicator (High)
LH seat back heater power
3
RH seat ventilation indicator (High)
LH seat heater indicator (Low)
RH seat cushion heater power
4
LH seat ventilation indicator (Low)
RH seat heater switch
RH seat back heater power
5
RH seat blower speed
RH seat heater indicator (Low)
LH seat blower power
6
LH seat blower speed
RH seat heater indicator (Mid)
RH seat blower power
7
LH seat ventilation indicator (Mid)
-
Battery (+)
8
LH seat ventilation indicator (High)
Illumination (-)
LH seat heater ground
9

Detent
Ground
10
Ventilation / Heater unit_IGN 1
RH seat heater ground
11
-

12
LH seat heater indicator (Mid)
13
LH seat heater indicator (High)
14
LH seat heater switch
15
RH seat ventilation indicator (Low)
16
RH seat ventilation indicator (Mid)
17
-
18
RH seat NTC (+)
19
LH seat NTC (+)
20
Ventilation / Heater unit_IGN 2

[Rear Heater Unit]

No.
Connector A
1
Battery (+)
2
Battery (+)
3
RH seat heater (+)
4
RH seat heater indicator (Low)
5
-
6
RH seat heater indicator (High)
7
RH seat NTC (+)
8
-
9
RH seat heater switch
10
-
11
RH NTC (-)
12
RH seat heater ground
13
Ground
14
IGN1
15
IGn2
16
LH seat heater power
17
LH seat heater indicator (Low)
18
-
19
LH seat heater indicator (High)
20
LH seat NTC (+)
21
-
22
LH seat heater switch
23
Detent
24
LH seat NTC (-)
25
LH seat heater ground
26
Ground

Schematic Diagrams

Front Seat

[Heater Unit]

[Ventilation Unit]

Rear Heater Unit

Repair procedures
Inspection

Driver/Passenger Seat Heater

1.

Check for continuity and measure the resistance between terminals.

Standard value

Driver / Passenger (cushion) : 2.98Ω±10% / 22°C

Driver / Passenger (back) : 3.80Ω±10% / 22°C

Driver / Passenger (cushion + back) : 1.67Ω±10% / 22°C

No.
Heater
Ventilation
1
-
NTC (+)
2
-
-
3
Heater power
NTC (-)
4
NTC (+)
Cushion heater power
5
NTC (-)
Back heater power
6
Ground
Ground

Rear Seat Heater

1.

Check for continuity and measure the resistance between terminals No 1 and No 4.

Standard value : 3.74Ω±10%/22°C

Removal

Driver / Passenger Seat Heater Unit

1.

Remove the passenger seat cushion.

(Refer to Body - "Front Seat Cushion Cover")

2.

Remove the cover (A) after loosening the bolts.

3.

Remove the heater unit (B) by loosening the screws after disconnecting the connector (A).

Rear Seat Heater Unit

1.

Remove the rear seat cushion.

(Refer to Body - "Rear Seat Cushion Cover")

2.

Remove the rear seat heater unit (B) after disconnecting the connector (A).

Installation
1.

Install in the reverse order of removal.

Seat Electrical
...

Seat Heater Switch
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