Avenger L4-2.4L (2009)
Seat Heater: Description and Operation
Heated Seats - Operation
OPERATION
The heated seat system operates on battery current received through a fuse in the Totally Integrated Power Module (TIPM). 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 Module (2) is used to control the heated seat system. The module is located under the driver front seat mounted to the seat pan (4). The
heated seat 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 (4) are depressed a switch status message is sent to the instrument cluster, sometimes referred to as the Cab
Compartment Node (CCN), via the Local Interface Network (LIN) data bus. The CCN then sends a message via the LIN data bus to the heated seat
module, signaling the module to energize the heating element for the selected seat. 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. The heated seat module sends the LED
illumination message to the CNN via the LIN data bus. The CNN then sends the LED illumination message to the accessory switch bank so that the
appropriate LEDs are illuminated for any given heating level. 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.
