PT Cruiser L4-2.4L Turbo VIN 8 (2005)
Seat Heater Switch: Description and Operation
Passenger Heated Seat Switch
The heated seat switches are located on the outboard cushion side shield of the driver and passenger seats. The two, momentary rocker type switches
provide a resistor multiplexed signal to the Heated Seat Module (HSM) through separate hard wired circuits. 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 modes that can be selected with each of the heated seat switches: Off, Low, and High. When the front of the switch rocker is depressed,
the High mode is selected and the high mode LED indicator illuminates. Depressing the front of the switch rocker a second time will turn the heated seat
to Off. When the rear of the switch rocker is depressed, the Low mode is selected and the low mode LED indicator illuminates. Depressing the rear of
the switch rocker a second time will also turn the heated seat to Off. In addition, the heated seats will automatically return to the Off mode anytime the
vehicle ignition switch is turned Off.
Both switches provide separate resistor multiplexed hard wire inputs to the Heated Seat Module to indicate the selected mode. The Heated Seat Module
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).
