The warmer the air, the lower the resistance of the IAT sensor.The cooler the air, the higher the resistance of the IAT sensor.
Its resistance changes in response to changes in the air's temperature. The IAT sensor is a resistor (technically a thermistor).One wire supplies 5 Volts from the PCM.The intake air temperature (IAT) sensor has two wires in its connector.To better understand the intake air temperature (IAT) sensor's job, here's a brief explanation of how it works: Why does the fuel injection computer need to know this temperature? This is because the warmer the air, the less fuel the PCM (Powertrain Control Module = Fuel Injection Computer) needs to inject into the cylinders. Yeah, minus 38 degrees Fahrenheit.Īs you may already be aware, the IAT sensor's job is to sense and report the temperature of the air entering the engine. When the PCM see this high voltage, which is usually 5 Volts DC, it thinks that the temperature is around -38 ☏ (-39 ☌). Specifically, that the IAT sensor is reporting a high voltage.
#88 toyota diagnostic codes code#
One of the most important things we need to know is that code P0113 is referring to a malfunction in the temperature value that the intake air temperature sensor (IAT) is reporting to the PCM.
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