RAM 3500 Truck 2WD L6-6.7L DSL Turbo (2010)
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 Control Module (HSCM) is used to control the heated seat system. The HSCM responds to heated seat switch input and ignition switch
status inputs by controlling the 12v output to the seat heating elements through integral solid-state relays.
When any of the heated seat switches are depressed the heating elements for the selected seat are energized. Light Emitting Diodes (LEDS) on the 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 HSCM 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.
