Durango 2WD V8-5.7L Hybrid (2009)
Seat Heater: Description and Operation
Heated Seats - Operation
Front Heated Seat System
OPERATION
The heated seat system operates on battery current received through a fuse in the Integrated Power Module (IPM). Fused ignition switch output (run-acc)
circuits are used, so that the heated seat system will only operate when the ignition switch is in the On or Accessory positions. The heated seat system
will turn Off automatically whenever the ignition switch is turned to any position except On or Accessory.
A Heated Seat Module is used to control the heated seat system. The module responds to heated seat switch messages 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 switches are depressed a resistance signal is sent to the Cab Compartment Node (CCN) or instrument cluster. The Cab
Compartment Node (CCN) then sends a CAN bus message to the heated seat module, signaling the module to energize the heating element for the
selected seat. The Cab Compartment Node (CCN) also turns on the HI and LO LED indicators on each of the heated seat switches.
The heated seat module energizes an integral solid-state relay, which supplies battery current to the heating elements. When the pre-programmed
duty-cycle has been achieved (approx. 2 hours), the module de-energizes the solid-state relay. The module will continue to cycle the solid-state relay as
needed to maintain the temperature set point. No heated seat sensors are used with the heated seat system option.
The module will automatically turn off the heating elements if it detects an OPEN or LOW short in the heating element circuit. See the vehicle glove box
for more information on the features, use and operation of the heated seat system.
Second Row Heated Seat System
OPERATION
The heated second row 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 second row seat system will only operate when the ignition switch is in the On position. The 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 second row 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 second row 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.
The system will automatically turn off the heating elements if it detects an OPEN or LOW short in the heating element circuit.
