Concorde V6-3.5L VIN V (2003)
Fig.7 Heated Seat Element - Typical
HEATED SEAT ELEMENT
The heated seat element is the component which produces the heat felt in the front seats The heated seat system includes four seat heating elements.
Two elements are located in each front seat, one for the seat cushion and the other for the seat back.
These individual heating elements are electrically connected in series with the Memory Heated Seat/ Mirror Module. With the elements electrically
connected in this way if a break anywhere in the heating element circuit occurs, neither the seat cushion or seat back heating element will function.
The heating elements are made of carbon fiber, which provides a strong and dependable design. Refer to Heated Seat Element Diagnosing and Testing
for detailed diagnostic procedures.
A heated seat sensor is integral to the individual heated seat cushion elements. The heated seat sensor cannot be replaced separately If a problem is
found with the sensor the complete heated seat element must be replaced. On some models, this can also include the leather trim cover. Refer to
Heated Seat Sensor in this section for more information.
Some LH models have the heating elements stuck to the seat cushion foam, while others have the element permanently sewn into the seat cushion/back
leather trim covers. The heated seat elements and temperature sensor cannot be adjusted or repaired and, if faulty or damaged, the heated seat element
must be replaced.
The heated seat elements resist the flow of electrical current. When battery current is passed through the elements, the energy lost by the resistance of
the elements is released in the form of heat. The heated seat temperature sensor is a NTC thermistor. When the temperature of the seat cushion cover
rises, the resistance of the sensor decreases. The Memory Heated Seat/Mirror Module supplies five volts to one side of each sensor, and monitors the
voltage drop through the sensor on a signal/return circuit. The Memory Heated Seat/Mirror Module uses this temperature sensor input to monitor the
temperature of the seat, and regulates the current flow to the heated seat elements accordingly.
HEATED SEAT SENSOR
Two heated seat sensors are used per vehicle. One is located in each front seat cushion heating element. Refer to Heated Seat Element in this section
for more information. The heated seat temperature sensors are Negative Temperature Coefficient (NTC) thermistors that are permanently attached to
the individual cushion heating elements.
The heated seat sensors cannot be repaired or adjusted and if found to be faulty, the complete heated seat cushion element must be replaced.
When the temperature of the heated seat element rises, the resistance of the heated seat sensor decreases. The memory heated seat/mirror module
supplies five volts to one side of each sensor, and monitors the voltage drop through the sensor on a return circuit. The module uses this temperature
sensor input to monitor the temperature of the seat, and regulates the current flow to the seat heating elements accordingly.