Manifold Absolute Pressure And Temperature Sensor
WARNING: This page is about a different variant/trim than selected.
The MAPT is located in the intake manifold. The sensor is secured with a single screw and sealed with an o-ring seal. The sensor provides a voltage signal to the PCM relative to the intake manifold pressure and temperature.
The MAPT has a 4-pin connector.
The 4-pin electrical connector provides the following connections:
- A 5V reference voltage from the PCM .
- A pressure signal to the PCM .
- A temperature signal to the PCM .
- A ground connection.
The MAPT allows the PCM to calculate the charge air density immediately before it enters the combustion chamber. This is used to adjust the ignition timing relative to the charge air pressure and to monitor the performance of the charge air cooler.
The MAPT uses a diaphragm transducer to measure the air pressure and a NTC resistor type sensor to measure the temperature.