Circuit/System Description
WARNING: This page is about a different variant/trim than selected.
The intake air temperature (IAT) sensor 3 is a variable resistor that changes an engine control module (ECM) supplied 5 V signal. The signal varies with intake manifold air temperature and is displayed by the scan tool as °C (°F). The IAT sensor 3 is integrated with the manifold absolute pressure sensor in the intake manifold. The ECM provides a ground for the IAT sensor 3 low reference circuit.
IAT Sensor 3 - Temperature, Resistance, Voltage Table
| IAT Sensor 3 | IAT Sensor 3 Resistance | IAT Sensor 3 Signal Voltage |
|---|---|---|
| Cold | High | High |
| Warm | Low | Low |