Air Temp Sensor Resistance

Let the engine cool before doing this as you can be severely burned.

Air temp sensor resistance.

Verify any suspicions with a visual inspection of the sensor and its connector. Two types of iat sensors. Temperature and resistance values of an iat sensor. Testing the iat sensor.

The intake air temperature sensor or iat sensor has the core function of monitoring the temperature of the air that is entering the engine of your vehicle. Allow the sensor to cool before further testing. You will need a hair drier and ohmmeter for the testing portion of this process. A faulty sensor can decrease the life of the engine and reduce the efficiency of fuel consumption.

Automotive air conditioning systems use ntc sensors to monitor air temperature. A checking iat sensor resistance. The in car temperature sensor icts is an ntc. As the temperature increases the resistance is reduced which reduces the voltage at the sensor.

Use a multimeter and verify the manufacturer s specifications 220 240 ohms at 70 80 f to test this sensor for proper resistance. The control unit evaluates these voltage values since they are directly related to the intake air temperature low temperatures result in high voltage values. Never use this to test. This information is very useful for the engine control unit or ecu for many functions and calculations such as calculating the air density for effective ignition timing and fuel efficiency.

The resistance of the temperature sensor changes depending on the intake air temperature. Intake air temperature sensor location. Testing the iat sensor off the vehicle. Causes and symptoms of a bad intake air temperature iat sensor.

Take a look at the symptoms and understand why such a problem occurs. B checking the iat sensor power and ground circuit.