Front Seats, Heated Seat Switch

Heated Seat Switch

Description






The two heated seat switches (3) for the front seats are located in the center stack (4) rear heating, ventilation and air conditioning control unit (2). 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 HVAC control unit. If the switches are inoperative or damaged in any way the complete HVAC control unit must be replaced.

Operation

The heated seat switches for the front row seats are located in rear HVAC control unit. The rear HVAC control unit is mounted in the lower portion of the instrument panel center stack. Amber light emitting diodes in the top portion of 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 the highest level setting. Pressing the switch a second time will select the lowest level setting. Pressing the switch a third time will shut the heating elements off.

When either of the two momentary, push button type heated seat switches are depressed a resistance signal is sent to the electromechanical instrument cluster, also known as the cab compartment node. The instrument cluster receives this message via the controller area network data bus. The instrument cluster then sends a message via the local interconnect network data bus to the heated seat module, signaling the module to energize the heating element for the selected seat.

The front heated seat switches are an integral part of the HVAC control unit. If the switches are inoperative or damaged in any way the complete HVAC control unit must be replaced.