Circuit Description

The manifold absolute pressure (MAP) and the intake air temperature (IAT) sensor 2 are an integrated sensor. The IAT sensor 2 is a variable resistor that measures the temperature of the air entering the engine intake manifold. The powertrain control module (PCM) supplies 5 volts to the IAT sensor 2 signal circuit and a ground for the IAT sensor 2 low reference circuit. When the sensor is cold the resistance is greater. This results in a greater voltage on the signal circuit, that is interpreted by the PCM as a colder IAT. As the sensor becomes warmer the resistance decreases. This results in a lesser voltage on the IAT signal circuit, that is interpreted by the PCM as a warmer IAT. If the PCM detects an IAT sensor 2 signal voltage that is not within a calibrated range of the IAT sensor 1 signal voltage, DTC P0096 sets.