In-Car Temperature Sensor: Operation
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
Air is drawn from the passenger compartment by the aspirator motor, and flows over the in-car temperature sensor thermistor. The thermistor changes resistance with air temperature. The BCM measures this resistance and calculates the temperature of the air drawn into the A/C-heater control. The ATC system then makes adjustments to maintain the optimum passenger compartment comfort. Refer to the In-Car Sensor Aspirator Motor Operation table for when the aspirator motor is operating.
IN-CAR SENSOR ASPIRATOR MOTOR OPERATION
| CONDITION | MOTOR OPERATION |
| IGNITION SWITCH IS ON | Motor always operates, even when atc control head "off" button is pushed. |
| VEHICLE IS DRIVEN, THEN THE IGNITION SWITCH IS TURNED OFF | Motor turns off when the ignition switch is turned off. |
| VEHICLE DOOR IS OPENED, AND LEFT OPEN, WITHOUT TURNING ON THE IGNITION SWITCH | Motor will turn on, and then turn off approximately 2 minutes from the time the door was opened. |
| VEHICLE DOOR IS OPENED, AND THEN CLOSED, WITHOUT TURNING ON THE IGNITION SWITCH | Motor will turn on, and then turn off approximately 2 minutes after the door was closed. |
The in-car temperature sensor thermistor and aspirator motor are part of the A/C-heater control and cannot serviced separately. If faulty or damaged, the A/C-heater control must be replaced.