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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Ambient Outside Air Temperature Sensor

The outside air temperature sensor is a temperature-sensitive resistor. The resistance of the outside air temperature sensor varies inversely with the outside air temperature. As the outside air temperature increases, the resistance decreases. As the outside air temperature decreases, the resistance increases.

The Electronic Climate Control (ECC) module monitors the outside temperature signal and uses this information in order to help determine command signals.

NOTE: The sensor will not update when the vehicle is traveling less than 5 mph.