Heated Seat Operation

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

This heated seat system does not utilize a control module for heated seat operation. The seat heating switch directly controls seat heating with one temperature setting. With the ignition ON, ignition voltage is applied to the driver and passenger seat heating switches through 15 A fuse located in the instrument panel fuse block. Ground is supplied to the switches through the switch ground circuit and the ground connection. This ground circuit is used only for the purpose of illuminating heated seat ON indicator. When a heated seat switch is pressed, ignition voltage is applied through the switch contacts and the control circuit activating the seat heating elements.

The heating elements for the seat cushion and back are wired in parallel with a harness and wire connector connecting the two together. This heated seat system utilizes a self-regulating heating element system, which is different from the non-regulated heating element systems with seat temperature sensors used on other GM vehicles. In the self-regulating type of system, the heating element material itself regulates the seat surface temperature based on the effective voltage applied to the heating element.