Front Seats

DESCRIPTION





Two heated seat switches (2) for the front seats are located in the center stack of the instrument panel. These two switches allow the driver and front seat passenger to select from two different levels of electrical seat heating (HI/LO). The front heated seat switches are an integral part of the instrument panel lower switch pod assembly (1). If either of the switches is damaged or inoperative the complete switch pod assembly must be replaced, Heated Seat Switch - Removal.

When either of the front heated seat switches are depressed a resistance signal is sent to the ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN). The instrument cluster receives this message via the Local Interconnect Network (LIN) data bus. The instrument cluster then sends a message via the Controller Area Network (CAN) data bus to the heated seat module, signaling the module to energize the heating element for the selected seat.

Amber Light Emitting Diodes (LEDs) in each switch indicate the level of heat in use: Two LEDs are illuminated for high, one for low, and none for off. Pressing the switch once will select high-level heating. Pressing the switch a second time will select low-level heating. Pressing the switch a third time will shut the heating elements off. The switch LEDs are controlled by the instrument cluster.

The LED indicator lamps in each heated seat switch cannot be repaired. If the LED lamps are inoperative or damaged, or the switch is inoperative or damaged the complete instrument panel lower switch pod assembly must be replaced, Heated Seat Switch - Removal.