Seat Temperature Element: Description and Operation

Seat Heaters System Description

The front seat heater system consists of the seat heater control unit, the driver's seat heater (seat cushion and seat-back), the front passenger's seat heater (seat cushion), the seat heater relay, and the climate control unit with built-in driver's seat heater switch and the front passenger's seat heat heater switch.

The front seat heater system controls the driver's seat heater and the front passenger's seat heater operation based upon signals from the ignition switch, the seat thermistors, and the climate control unit

Seat Heater Control Unit

The seat heater control unit is installed under the driver's seat, and controls the seat heaters.

Climate Control Unit

The climate control unit is located on the center of dash, and sends a seat heater switch signal to the seat heater control unit using the B-CAN line.

Seat Heaters

The seat-back heater is installed in the driver's seat, and the seat cushion heater is installed in the driver's seat and the front passenger's seat. Also the thermistor is built into the seat cushion.

The thermistor outputs the seat heater temperature signal to the seat heater control unit.