Functions of Diode and Buzzer Range on Multimeter
The function of the diode buzzer of a multimeter is to detect whether the circuit is connected and to check the Hall resistance of the diode.
Firstly, check whether the line from the controller to the terminal is connected.
For example, detecting the circuit of the handlebar: unlocking, powering on the entire vehicle, turning on the power, the car does not move, and changing the handlebar also does not work. Connect the red probe to the controller handle wire, and connect the other section to the handle terminal to detect if the red, black, and blue colors are connected. If a beep is not heard, it means that the wire is broken.
Secondly, check if the handle and Hall sensor are damaged.
Connect the red probe to the negative signal line of the handle, and connect the black probe to the green signal line of the handle. If there is a signal of 500 to 600, it indicates that the handle is working properly. The motor Hall is connected to the negative signal wire in red, and the black probe is connected to the green wire, yellow wire, and blue wire in sequence. A stable value of 500 to 600 indicates that the Hall is normal. The value of 500-600 represents a positive voltage change of 0.5-0.6
Thirdly, check the quality of the phase line of the controller.
Connect the negative terminal of the controller in red, and connect the yellow, blue, and green phase wires in black at once. If the measured values are the same, it indicates that the phase wires are normal.
Fourth, check the quality of LED bulbs.
The black pen is connected to the negative pole, the red pen is connected to the positive pole, and the light is on normally.
