Ambient Temperature Sensor

Ambient Temperature Sensor

Description






The ambient temperature sensor (2) is a variable resistor mounted to a bracket that is secured to the center of the lower radiator support, behind the grille and in front of the engine compartment.






The ambient temperature sensor cannot be adjusted or repaired and, if inoperative or damaged, it must be replaced.

Operation

The ambient temperature sensor is a variable resistor that operates on a 5 volt reference signal. The resistance in the sensor changes as temperature changes, changing the temperature sensor signal circuit voltage to the totally integrated power module. Based upon the resistance in the sensor, the instrument cluster, sometimes referred to as the cab compartment node, display senses a specific voltage on the controller area network data bus circuit, which corresponds to a specific temperature. The applicable instrument cluster display then displays the proper ambient temperature.