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