Operation

HEATED SEAT SYSTEM

The heated seat system operates on battery current received through a fuse in the Integrated Power Module (IPM). Fused ignition switch output (run-acc) circuits are used, so that the heated seat system will only operate when the ignition switch is in the On or Accessory positions. The heated seat system will turn Off automatically whenever the ignition switch is turned to any position except On or Accessory.

A Heated Seat Module is used to control the heated seat system. The module responds to heated seat switch messages and ignition switch status inputs by controlling the 12v output to the front seat heating elements through integral solid-state relays.

When either of the heated seat switches are depressed a resistance signal is sent to the Cab Compartment Node (CCN) or instrument cluster. The Cab Compartment Node (CCN) then sends a CAN bus message to the heated seat module, signaling the module to energize the heating element for the selected seat. The Cab Compartment Node (CCN) also turns on the HI and LO LED indicators on each of the heated seat switches.

The heated seat module energizes an integral solid-state relay, which supplies battery current to the heating elements. When the pre-programmed duty-cycle has been achieved (approx. 2 hours), the module de-energizes the solid-state relay. The module will continue to cycle the solid-state relay as needed to maintain the temperature set point. No heated seat sensors are used with the heated seat system option.

The module will automatically turn off the heating elements if it detects an OPEN or LOW short in the heating element circuit. See the owner's manual in the vehicle glove box for more information on the features, use and operation of the heated seat system.