How to test BMW 320i electronic valve motor, and teach you the test method.

1. Check whether the displayed values of the throttle position and accelerator pedal position sensor of BMW 320i are consistent with the specified values. The engine control unit converts the voltage value of the angle sensor into a percentage (based on 5V) and displays the percentage value (5V is equivalent to 100%).

2. Turn on the ignition switch of BMW 320i, and use multimeter to measure the voltage between terminal 1 and ground, terminal 1 and 5, terminal 2 and ground, and terminal 2 and 3 of the accelerator pedal position sensor as 5V.

3. Connect the BMW 320i detection box VAG 1598/3 1 to the wire harness of the engine control unit, and check whether the wires connected to each terminal of the wire plug are open or short-circuited to ground/positive pole. If necessary, correct the open or short circuit of the wire. If there is no problem with the wiring, replace the accelerator pedal position sensor.