Magnum SRT-8 V8-6.1L VIN 3 (2006)
Seat Heater Switch: Description and Operation
The heated seat switches (1) are both mounted in the instrument panel. The two switches are snapped into mounting holes in the instrument panel center
bezel. The two heated seat switches are identical in appearance and construction.
Each heated seat switch provides a resistor-multiplexed signal to the Cab Compartment Node (CCN). Amber Light Emitting Diodes LEDS) 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 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 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 individual heated seat switch assembly must be replaced.
The heated seat switches receive battery current through a fused ignition switch output (run) circuit when the ignition switch is in the On position.
Depressing the heated seat switch provides a hard-wired resistor multiplexed signal to the Cabin Compartment Node (CCN). The CCN is responsible for
supplying the Controller Area Network (CAN) data bus message to the heated seat module, signaling the module to power the heated seat element of the
selected seat and maintain the temperature setting.
If the heated seat switch is depressed to a different position (Low or High) than the currently selected state, the CCN will go through the process again to
change the temperature setting. If a heated seat switch is depressed a second time to the same position as the currently selected state, the CCN and heated
seat module interprets the second input as a request to turn the seat heater OFF. The CCN will then signal the heated seat module to turn the heated seat
elements for that seat off.
