Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Ambient Temperature Sensor / Switch HVAC: Description and Operation

Fig.21 Ambient Temp Sensor:




The ambient air temperature sensor is located on the inside of front bumper beam. This sensor informs the ATC system of the ambient temperature outside vehicle.

The ambient temp sensor is used by the ATC system to adjust blower speed, temperature offsets, evaporator temperatures and mode control.