How to measure the pressure sensor of c37 intake pipe in Dongfeng Xiaokang?

1. Use a voltmeter to measure the wire connector of the intake pressure sensor. When the ignition switch is turned to "on", the power supply terminal (pin C) should have a voltage of 5V, indicating that the computer does provide a stable voltage of 5V. 2. Measure pins A and C of the connector again, which should also be 5V, indicating that the grounding circuit of the intake pressure sensor is normal. 3. Continue to measure the signal voltage of the intake pressure sensor with voltmeter, that is, the voltage value between pin B and pin C. After the ignition switch is turned to "on", it should be above 4V. After the engine is started, the range is1~1.5v. When the throttle is gradually opened to increase the engine speed, the voltage value should also be gradually increased to about 4V.