Durango 4WD V8-4.7L VIN P Flex Fuel (2007)
Ambient Temperature Sensor / Switch HVAC: Description and Operation
Overhead Module
Description
DESCRIPTION
The ambient temperature sensor is a variable resistor mounted to a bracket that is secured with a screw to the right side of the radiator yoke, behind the
radiator grille and in front of the engine compartment.
For complete circuit diagrams refer to Diagrams/Electrical. The ambient temperature sensor cannot be adjusted or repaired and, if inoperative or
damaged, it must be replaced.
Operation
OPERATION
The ambient temperature sensor is a variable resistor that operates on a five-volt reference signal sent to it by the A/C-heater control. The resistance in
the sensor changes as temperature changes, changing the temperature sensor signal circuit voltage to the A/C-heater control. Based upon the resistance in
the sensor, the A/C-heater control senses a specific voltage on the temperature sensor signal circuit, which it is programmed to correspond to a specific
temperature.
