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Home >> Pontiac >> 1999 >> Firefly (CANADA) L4-1.3L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions - Powertrain Systems >> IAT
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IAT

Scan Tool Range -40°C to 120°C (-40°F to 250°F). The PCM displays the electrical resistance of the Intake Air Temperature sensor (IAT) as degrees. The PCM uses the IAT sensor in order to calculate incoming air density. The PCM uses air density information in order to adjust fuel delivery and ignition timing.
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