SENSOR-AMBIENT TEMPERATURE
DESCRIPTION
The ambient temperature sensor is a variable resistor type sensor. It is mounted to the lower front fascia behind the radiator 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 five-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 (TIPM). Based upon the resistance in the sensor, the instrument cluster or Cab Compartment Node (CCN) display senses a specific voltage on the Controller Area Network (CAN) data bus circuit, which corresponds to a specific temperature. The compass/temperature display unit then displays the proper ambient temperature.
REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Remove the belly pan.
3. Disconnect the wire harness connector (1) from the ambient temperature sensor (2).
4. Remove the fastener that secures the ambient temperature sensor bracket to the front fascia.
5. Remove the ambient temperature sensor from the vehicle.
INSTALLATION
1. Position the ambient temperature sensor in the vehicle.
2. Install the fastener that secures the ambient temperature sensor to the front fascia.
3. Connect the wire harness connector (1) to the ambient temperature sensor (2).
4. Install the belly pan.
5. Connect the battery negative cable.