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DESCRIPTION
Ambient air temperature is monitored by the Electronic Vehicle Information Center (EVIC) by ambient temperature messages obtained from the Body Control Module (BCM) over the Programmable Communications Interface (PCI) information bus community. The BCM receives a tough wired enter from the ambient temperature sensor. The ambient temperature sensor is a variable resistor mounted to a bracket that’s secured with a screw to the fitting facet of the headlamp mounting module grille opening, behind the radiator grille and in entrance of the engine compartment. The ambient temperature sensor can’t be adjusted or repaired and, if defective or broken, it have to be changed.
OPERATION
The ambient temperature sensor is a variable resistor that operates on a five-volt reference sign despatched to it by the BCM. The resistance within the sensor adjustments as temperature adjustments, altering the temperature sensor sign circuit voltage to the BCM. Based upon the resistance within the sensor, the BCM senses a selected voltage on the temperature sensor sign circuit, which it’s programmed to correspond to a selected temperature. The BCM then sends the correct ambient temperature messages to the EVIC over the PCI information bus.
The temperature operate is supported by the ambient temperature sensor, a wiring circuit, the Body Control Module (BCM), the Programmable Communications Interface (PCI) information bus, and a portion of the Electronic Vehicle Information Center (EVIC) module. If any portion of the ambient temperature sensor circuit fails, the BCM will self-diagnose the circuit. A temperature studying of 130° F will seem within the EVIC show rather than the temperature when the sensor circuit is shorted. A temperature studying of 40° F will seem within the EVIC show rather than the temperature when the sensor circuit is open.
