Battery positive voltage (B+) is supplied all times to both front heated seat modules via the battery positive voltage (B+) circuit and the rear fuse block HTDST LF Fuse for the left seat, or the HTDST RF Fuse for the right seat. Both heated seat modules are grounded via the heated seat ground circuit and G30. With the ignition switch in the ON position, Battery positive voltage (B+) is also supplied to both heated seat modules via the ignition 3 circuit and the rear fuse block IGN 3 RR Fuse.

Each heated seat is controlled by a separate heated seat switch. The heated seat switch provides a path to ground when pressed. When the heated seat High/Low switch is pressed, the high/low heated seat switch signal of the module is momentarily grounded via the high/low heat switch circuit and the high/low heat switch contacts. The heated seat module then applies battery positive voltage (B+) to the heated seat heating elements. The heated seat module monitors the seat surface temperature through a thermistor and maintains a pre-determined temperature through the controled ground circuit of the heating element.

When the heated seat is off and the heated seat High/Low heat switch is pressed once, the heated seat module will set the heated seat temperature to HIGH. The heated seat module supplies battery positive voltage (B+) via the high heat LED feed circuit and the heated seat switch high heat LED. When pressed again, the heated seat temperature is then set to LOW. The heated seat module supplies battery positive voltage (B+) via the low heat LED feed circuit and the heated seat switch low heat LED. When the heated seat OFF switch is pressed, the heated seat module removes battery positive voltage (B+) from the heated seat heating elements and the appropriate LED. The heated seat module will also turn off the heated seat whenever the ignition switch has been turned the OFF position.

The ON/OFF status of the heated seat is reported to the rear integration module (RIM) via the output status circuit and the heated seat module. During Load Shed 2 all heated seats are turned off by the RIM via the inhibit control signal circuit to the heated seat module. The heated seat module will deactivate the heated seats and the appropriate heated seat switch LED.