In-Car Sensor
WARNING: This page is about a different car, the 2001 Isuzu VehiCROSS. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect in-car sensor. Using DVOM, measure resistance across specified terminals of in-car sensor. See Fig 1 . Using graph in illustration, compare resistance value with current ambient temperature. If resistance value is not near specified values, replace in-car sensor.