Heated Seats System Components
The heated seats system for the driver and passenger seat consists of
the following components:
• | Seat cushion heater element |
• | Seat back heater element |
• | Heated seat cushion thermistor |
Heated Seats System Operation
Both the driver and passenger seats have 2 heating elements. One is
in the seat cushion and the other is in the seat back. The heated seats are
capable of obtaining temperatures of 98°F in LOW mode and 107°F in
HIGH mode. Battery voltage is supplied to the heated seat module from the
SEO2 30A fuse and through a PTC device. The PTC is hardwired in the battery
voltage supply circuit in the seat harness assembly and provides extra circuit
protection. Ignition voltage is supplied to the heated seat switch from the
IGN3 10A fuse. When the heated seat switch is pressed ignition voltage is
supplied to the solid state switching device within the heated seat switch
assembly. The first time the heated seat switch is activated the solid state
switching device supplies voltage to illuminate the high LED indicator and
a signal voltage to the heated seat module indicating the high mode is active.
The second time the heated seat switch is activated the solid state switching
device supplies voltage to illuminate the low LED indicator and a voltage
signal to the heated seat module indicating the low mode is active. When
the heated seat module receives a high or low mode active signal from the
heated seat switch signal circuit, battery voltage is supplied to the seat
cushion and back heater elements. The heated seat cushion thermistor provides
a signal to the heated seat module used to determine the seat cushion temperature.
The heated seat module regulates the supply voltage to the heater elements
according to the inputs from the heated seat switch and the seat cushion
thermistor.