The MAP sensor provides information to the PCM about engine load (about vacuum in the suction manifold). The signal from the sensor changes from 0.5 to 3 V. The voltage of the signal from the sensor should correspond to that shown in the graph (photo). To remove the sensor, disconnect the hoses from the sensor and unscrew the screws.
Graph of the dependence of the MAP sensor signal voltage on the degree of vacuum: 1. Voltage (V); 2. Vacuum (mmHg); 3. Sensor