Detection method of automobile intake pressure sensor

A, unplug the vacuum tube; Set SW to on; The AC terminal inputs a working voltage of 5V.

B. Apply a negative pressure of13.3-66.7 kPa to MAP with a manual vacuum pump (that is, the pressure when the throttle valve is fully open and closed), and measure the servo voltage value of terminals B and C. The voltage value should be proportional to the absolute pressure; Is inversely proportional to the degree of vacuum.

C, when there is no vacuum pump, use the vehicle-mounted vacuum gauge to cooperate with the measurement under dynamic conditions. Or use nozzle hose, the general vacuum degree can reach about 20Kpa; The corresponding voltage value of 4.4V is better.