Hyundai Elantra AD Quiz
Engine Control System/Fuel System

Intake Air Temperature (IAT) Sensor Description and Operation

In this manual: Engine Control System/Fuel System
General Information — 9Engine Mechanical System — 84Engine Electrical System — 60Emission Control System — 24Engine Control System/Fuel System — 90Automatic Transmission — 92Drive Shaft and Axle — 20Suspension System — 31Steering — 20Restraints — 50Brake System — 63Body (Interior and Exterior) — 214Body Electrical System — 221Heating, Ventilation, and Air Conditioning — 71
~1min read

Description

The Intake Air Temperature (IAT) sensor is located inside the Manifold Absolute Pressure sensor and detects the intake air temperature. To calculate the exact air volume, air temperature correction is required because air density changes with temperature. Therefore, the ECM uses both the MAP signal and the IAT signal. This sensor uses a negative temperature coefficient (NTC) thermistor, and its resistance changes inversely with temperature.

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A quick Hyundai Elantra AD quiz: every answer comes with an explanation and a link to the manual page.