Seat Heater (Air Ventilation)

Components and Component Location

Components

Driver/Passenger Seat Heater

1. Seat Cushion Heater 2. Seat Heater Unit (Passenger Only)

3. Seat Back Heater

2nd Row Seat Heaters

1. Seat Heater Unit (passenger only) 2. Seat Cushion Heater

3. Seat Back Heater

Circuit Diagrams

Wiring Diagram

Driver/Passenger Seat Heater

Second Row Heated Seats

[Seat Ventilation Control Unit (Driver / Passenger Seat Heater)]

No	Connector A	Connector B	Connector C
1	-	-	Driver Cushion Heater
2	-	-	Driver Back Heater
3	-	-	Auxiliary Cushion Heater
4	DELAY	-	Auxiliary Back Heater
5	Illumination	-	Fan Driver
6	Driver Ventilation PWM Control	LIN	Auxiliary Fan
7	Auxiliary Heater Power	-	Battery (+)
8	Driver Heater Power	-	Driver Heater (-)
9	-	-	Ground
10	-	IGN 1	Auxiliary Heater (-)
11	-	-
12	-	-
13		-
14		-
15		-
16		-
17		NTC (-)
18		NTC Assistant (+)
19		NTC Driver (+)
20		IGN 2

[2nd Row Seat Ventilation Control Unit

No	Connector A	Connector B
1	Heater (-)	Heater Ventilation Unit IGN 2
2	Cushion Heater Power	Heater Ventilation Unit IGN 1
3	Seat Back Heater Power	-
4	Cushion Fan Power	-
5	Seat Back Fan Power	-
6	Heater Ventilation Power	Cushion Blower
7	Heater (-)	Seat Back Blower Fan
8	Heater Vent Mass	-
9	Heater Vent Mass	-
10	-	-
11	-	-
12	Heater Ventilation Power	LIN
13		-
14		-
15		-
16		-
17		-
18		-
19		-
20		-
21		-
22		NTC (+)
23		-
24		NTC (-)

Repair Procedures

Inspection

Front Seat

1. 1
   Check continuity and measure the resistance between the terminals.

   

   No	Description	No	Description
   1	NTC (+)	4	Heater (+)
   2	-	5	Rear Heater (+)
   3	NTC (-)	6	Ground

   
   

   Driver / Passenger	NTC sensor (± 5%)
   High	1.693 kΩ
   Middle	2.802 kΩ
   Low	5.922 kΩ

2. 2
   Turn on the seat heater after connecting the connector, then check the thermostat by measuring the seat surface temperature.

   Driver / Passenger	Cloth (± 2%)	Leather (± 2%)
   High	42 / 50°C	42 / 50°C
   Middle	39 / 45°C	39 / 45°C
   Low	36 / 40°C	36 / 40°C

3. 3
   Check continuity and measure the resistance between the terminals.

   

   No	Description	No	Description
   1	-	4	NTC (+)
   2	-	5	NTC (-)
   3	Heater Power	6	Ground

   
   

   Driver / Passenger	NTC sensor (± 5%)
   High	1.204 kΩ
   Middle	3.213 kΩ
   Low	6.472 kΩ

2nd Row Seat