Circuit Description

The Manifold Absolute Pressure (MAP) sensor measures change in intake manifold pressure (vacuum). PCM applies 5 volts to MAP sensor. Change in pressure that results from engine load and RPM changes is converted into a voltage signal that is monitored by PCM. By monitoring sensor output voltage, PCM can detect a change in manifold pressure.

DTC will set when signal voltage is greater than 4.8 volts with throttle position less than 10 degrees, or signal voltage less than 0.2 volt with throttle position greater than 5 degrees.