Ambient Temp Sensor: Description
WARNING: This page is about a different car, the 2003 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
Ambient air temperature is monitored by the Compass Mini-Trip Computer (CMTC) through ambient temperature sensor messages received from the Body Control Module (BCM) over the Programmable Communications Interface (PCI) data bus network. The BCM receives a hard wired input from the ambient temperature sensor. The ambient temperature sensor (Fig 1 ) is a variable resistor mounted in front the radiator, behind the grille, near the center of the vehicle.
Refer to BODY CONTROL MODULE in ELECTRONIC CONTROL MODULES information. For complete circuit diagrams, refer to SYSTEM WIRING DIAGRAMS information. The ambient temperature sensor cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.