Intake Air Temperature Sensor

Fig 8 Intake Manifold Air Temperature Sensor:

PURPOSE
The sensor provides an input voltage to the powertrain control module (PCM) indicating intake manifold air temperature. The input is used along with inputs from other sensors to determine injector pulse width.

OPERATION
As the temperature of the air-fuel stream in the manifold varies, the sensor resistance changes. This results in a different input voltage to the PCM.

LOCATION
The intake manifold air temperature sensor is installed in the intake manifold with the sensor element extending into the air stream.