Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection

INTAKE AIR TEMPERATURE SENSOR (IAT SENSOR)
The intake air temperature sensor (IAT Sensor), built-in type in the MAP sensor, is a resistor-based sensor which detects the intake air temperature According to the intake air temperature reading, the ECM will control the necessary amount of fuel injection.

Circuit Diagram:

TROUBLESHOOTING HINTS
The MIL is ON or the DTC is displayed on the HI-SCAN under the following condition;
- When the intake air temperature is detected below -40°C or higher than 12O°C.

Harness Inspection Procedures:

SENSOR INSPECTION




1. Using a multi meter, measure the IAT sensor resistance between terminals 3 and 4.
2. If the resistance deviates from the standard value replace the intake air temperature sensor assembly.