Concorde V6-2.7L VIN V (2001)
Seat Heater Switch: Description and Operation
Memory And Heated Switch Location
DRIVER SEAT HEATER SWITCH
The heated seat switches are located on the outboard cushion side shield of the driver and passenger seats,. The two, three-position rocker type
switches provide a resistor multiplexed signal to the Body Control Module (BCM) through separate hard wired circuits. Each switch has an OFF,
Low and High setting. Each switch contains two light emitting diodes (LED), one for each High and Low setting to let the occupant know that the
seat heater system is ON.
The heated seat switches and their LED's cannot be repaired. If either switch is faulty or damaged the entire switch must be replaced.
There are three positions that can be selected with each of the heated seat switches: OFF, Low, and High.
When the front of the switch rocker is fully depressed, the High position is selected and the high position LED indicator illuminates. When the rear
of the switch rocker is fully depressed, the Low position is selected and the low position LED indicator illuminates. When the switch rocker is
moved to its neutral position, or middle, OFF is selected and both LED indicators are extinguished.
Both switches provide separate resistor multiplexed hard wire inputs to the BCM to indicate the selected switch position. The BCM monitors the
switch inputs and sends heated seat switch status messages to the Heated Seat Module (HSM) or the Memory Heated Seat Module (MHSM) over
the Programmable Communications Interface (PCI) data bus. The HSM or MHSM responds to the heated seat switch status messages by
controlling the output to the seat heater elements of the selected seat. The Low heat position set point is about 36 °C (97 °F), and the High heat
position set point is about 41 °C (105 °F).
