Outside Air Temperature Sensor Check
WARNING: This page is about a different car, the 2005 Mitsubishi Montero. However, it is still accessible from the selected car via links, so may be relevant.
Measure the resistance between the sensor terminals under at least two temperatures. The resistance values should meet the values shown.
NOTE:
The temperature should be within the shown range.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.