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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IAT Sensor

The scan tool range is -40 to +151°C (-40 to +304°F). The PCM converts the resistance of the intake air temperature sensor to degrees. The Intake Air Temperature (IAT) is used by the PCM in order to adjust the fuel delivery and the spark timing according to the incoming air density.