Dakota 4WD V8-4.7L Flex Fuel (2008)
Seat Heater: Description and Operation
Heated Seats - Operation
OPERATION
The heated seat system operates on battery current received through a fuse in the Integrated Power Module (IPM). Fused ignition switch output (run)
circuits are used, so that the heated seat system will only operate when the ignition switch is in the On position. The heated seat system will turn Off
automatically whenever the ignition switch is turned to any position except On.
A Heated Seat Switch/Module is used to control the heated seat system. 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 two hours
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 indefinitely until the switch/module button is pushed to turn the system off.
The system will automatically turn off the heating elements if it detects an OPEN or LOW short in the heating element circuit.
