FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Heated Seats


The controls for the heated seats are located on the side of each seat. The system offers two seat temperature settings of approximately 98.6 F (LO) and approximately 107.6 F (HI).

As the temperature in the seat rises, the Negative Temperature Coefficient (NTC) resistance decreases and the voltage reading detected by the MHSMM increases. The seat heater output is deactivated once the voltage reading reaches it's upper threshold for either setting, high or low.

As the temperature decreases, the voltage reading decreases until the lower threshold is reached for either setting high or low. At this point the seat heat output is activated once again and this cycle repeats itself as long as the seat heat request is ON. The thresholds for low and high settings are preprogrammed into the MHSMM memory.

The heated seat switch contain resistors pulled up to ignition which are processed by the MHSMM as voltage readings indicating desired heat setting high or low.