Charger V8-5.7L (2008)
Seat Heater Switch: Description and Operation
Operation
Front Seats
OPERATION
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.
Rear Seats
OPERATION
A Heated Seat Switch/Module is used to control the heated rear seat system. The heated seat switch/modules receive battery current through a fused
ignition switch output (run) circuit when the ignition switch is in the On position. The switch/module responds to heated seat switch/module button input
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 switch/module buttons are depressed the heating element for the selected seat is energized. Amber Light Emitting Diodes
(LEDS) on the side of each switch/module indicate the level of heat in use: Two LEDs are illuminated for high, one for low, and none for off. Pressing
the switch/module button once will select high-level heating. Pressing the button a second time will select low-level heating. Pressing the button a third
time will shut the heating elements off.
The heated seat switch/module energizes an integral solid-state relay, which supplies battery current to the heating elements. When high-temperature
heating is selected, the heaters provide a boosted heat level during the first four minutes of operation after heating is activated. The heat output then
drops to the normal high-temperature level. If high-level heating is selected, the control system will automatically switch to the low level after thirty
minutes of continuous operation. At that time, the number of illuminated LEDs changes from two to one, indicating the change. Operation on the low
setting will continue for another thirty minutes and the system will then be automatically turned off.
