Section 139 (Power Liftgate System): Chime/Thermistor: Operation
WARNING: This page is about a different car, the 2005 Dodge Grand Caravan, 2005 Dodge Caravan, and 2005 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
The chime/thermistor assembly performs two different functions for the power liftgate system. First, the chime portion provides an audible chime sound which is controlled by the power liftgate control module. The chime/thermistor assembly is hardwired to the power liftgate control module. Second the thermistor provides a outside temperature reading by way of a resistance reading supplied to the power liftgate control module. As temperature increases the resistance reading increases, as temperature decreases the resistance reading decreases.