How does a intake air temp sensor work?

How does a intake air temp sensor work?

HOW THE INTAKE-AIR TEMPERATURE SENSOR WORKS: FUNCTIONAL PRINCIPLE. The intake-air temperature sensor determines the temperature in the suction pipe and forwards the voltage signals arising from the temperature to the control unit. The resistance of the temperature sensor changes depending on the intake-air temperature.

Where is the intake air temperature sensor located?

Intake Air Temperature Sensor located in the intake air duct from the air filter box or in the intake manifold to the engine. It’s job is to report the temperature of the outside air being drawn into the engine. The intake air temperature sensor reports its findings directly to the powertrain control module or engine control module.

How can I test my air temperature sensor?

You can test an intake air temperature sensor using a digital Ohm Meter set on the DC volts scale. Turn the IGN switch to the ON position and backprobe the return wire to see the voltage being reported to the PCM/ECM. You can also test the sensor’s resistance, but that’s not as accurate as reading the actual return voltage.

How are temperature sensors connected to MegaSquirt controller?

To start, both the temperature sensors (IAT, CLT) have one or two connections. The recommended sensors have two connections. With these, one goes to ground, the other to the MegaSquirt® EFI controller (the pins on the sensor are not oriented, you can connect the wires either way).

How to test the intake air temperature sensor?

P0113: Intake air temperature sensor circuit high (voltage) input Basically, your IAT sensor may fail in one or more of these ways: Whether you find a sensor-related DTC or not, if you suspect a problem with the IAT sensor, you should: Check the sensor itself. if necessary, inspect the wiring and connectors in the sensor’s circuit.

What should intake air temp be with engine off?

With the engine off, measure the sensor resistance across its terminals. At about 68 F (20 C), you should get around 37K ohms At about 86 F (30 C), you should get around 24K ohms Plug in the sensor electrical connector.

What should the temperature be on the IAT sensor?

After turning it on, check for the temperature of the IAT sensor. It should be 10°F above or below the ambient temperature of the vehicle. If this is not the case, you may have a problem with the sensor.

How to fix a bad intake air temperature ( IAT )?

If this does not happen, it means that the internal computer is to blame, and that it is not producing the voltage that the IAT sensor needs to function. To fix a faulty intake air temperature sensor, remove all carbon and oil accumulation. If this does not fix the problem, replacing the unit is the best option. Like it? Share it!