Note. For circuit reference, see WIRING DIAGRAMS - 4.3L article.
Circuit Description
Intake Air Temperature (IAT) sensor is a thermistor that varies resistance based on temperature. As temperature of sensor increases, resistance decreases. High temperature will result in a low signal voltage.
Conditions for setting DTC
- Vehicle speed at least 2 MPH.
- No VSS DTCs are set.
- Engine run time greater than 100 seconds.