Outside Temperature Sensor

This sensor is located just to the rear of the grille, in a protective housing. To help eliminate false temperature readings due to engine heat, programing techniques are used to minimize unwanted temperature variations.

A temperature memory feature is used in the BCM outside temperature sensor programing to help provide greater accuracy under engine restart conditions. If engine coolant is less than 50°F (10°C) above the outside temperature sensor reading, the actual sensed outside temperature is displayed.

Yet, if engine coolant is greater than 50°F (10°C) above the sensed reading, memorized outside temperature is displayed. This is the previous temperature sensed when the engine was last running.

At speeds less than or equal to 20 MPH, the BCM limits the displayed temperature value to an increase of 1 degree every 100 seconds. This compensates for false high temperature readings during heavy traffic or extended idle.

At speeds between 20 to 45 MPH, the outside temperature display is allowed to increase but only after a built-in 2 minute sensor cool down time delay. At speeds over 45 MPH there is no time delay.