Air Temp Sensor Resistance

Intake air temperature sensor location.

Air temp sensor resistance.

As the temperature increases the resistance is reduced which reduces the voltage at the sensor. The in car temperature sensor icts is an ntc. Different names for the iat sensor. Never use this to test.

Automotive air conditioning systems use ntc sensors to monitor air temperature. A checking iat sensor resistance. B checking the iat sensor power and ground circuit. Causes and symptoms of a bad intake air temperature iat sensor.

An iat sensor is an important component that is needed while starting up a vehicle s engine. 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. You will need a hair drier and ohmmeter for the testing portion of this process. Use a multimeter and verify the manufacturer s specifications 220 240 ohms at 70 80 f to test this sensor for proper resistance.

The resistance of the temperature sensor changes depending on the intake air temperature. Take a look at the symptoms and understand why such a problem occurs. Temperature and resistance values of an iat sensor. Remove the air intake temperature sensor after first removing the air intake housing.

Let the engine cool before doing this as you can be severely burned. Verify any suspicions with a visual inspection of the sensor and its connector. A faulty sensor can decrease the life of the engine and reduce the efficiency of fuel consumption. The control unit evaluates these voltage values since they are directly related to the intake air temperature low temperatures result in high voltage values.

Testing the iat sensor. Allow the sensor to cool before further testing.