Circuit/System Description

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Battery positive voltage is supplied at all times to the heated seat module through the battery positive voltage circuit and the HTD SEATS fuse located in the underhood fuse block. When commanded ON, the heated seat module uses this voltage to heat the seat heating elements. The heated seat module and the seat heating elements are grounded through the module ground circuit to G301.

When the heated seat switch is placed in either the high or low temperature position, battery positive voltage is applied through the heated seat switch signal circuit to the heated seat module. At the same time, battery voltage is also applied through one of two resistors in the switch and the heated seat HI/LO signal circuit to the module. In response to these switch signals, the heated seat module closes its contacts and applies battery positive voltage through the heated seat element supply voltage to the seat heating elements. When the heated seat switch is in the HIGH heat position, battery voltage is applied through a 200 ohm resistor and the module sets the seat temperature to high heat. When the heated seat switch is in the LOW heat position, battery voltage is applied through a 2,850 ohm resistor and the module sets the seat temperature to low heat.