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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IAT
The scan tool range is
-40°C to 120°C (-40°F to 250°F): The IAT sensor is a thermistor. The
PCM monitors the voltage on the IAT sensor signal circuit. When the IAT sensor is cold (internal resistance high), the PCM sees a high signal voltage. The signal voltage and the internal resistance of the sensor decrease as the engine becomes warm. The scan tool displays default values of
-40°C or -40°F when there is an open in the IAT sensor signal circuit.