An automobile network signal detection method

Abstract

The invention relates to an automobile network signal detection method. A detector is connected to an OBD diagnosis seat of an automobile. Firstly, the voltage of an automobile storage battery is detected;, when the voltage is normal, software communication between the CAN data and the mobile terminal can be realized in a wireless manner; whether the CAN data communication LED lamps RX and TX on the detector flicker or not is observed, if the CAN data communication LED lamps RX and TX flicker, it is indicated that CAN data communication is normal, fault codes of all ECUs of an automobile are read through wireless communication, the network fault of the automobile can be accurately detected and positioned, and the network fault reason on a positioning node can be judged through the detector; And after the cable fault is eliminated, the automobile ECU still cannot communicate with the network, and whether the CAN waveform transmitted and received by each ECU meets the standard or not isdetected through the detector. The cable fault problem is judged through flickering cooperation of the LED lamp, simplicity and clearness are achieved, a deep relevant professional basic theory does not need to be mastered, and the problems that diagnosis is time-consuming, labor-consuming and low in efficiency are solved.

Description

technical field [0001] The invention relates to the technical field of automobile fault diagnosis, in particular to a method for detecting automobile network signals. Background technique [0002] The car network is a very important part of controlling and realizing various functions of our cars, but it is usually invisible to us. If the car network fails, we need a fast and effective tool to detect the status of the car network. There is no detection tool specifically for the automotive network in the market. Traditional oscilloscopes can detect the waveform of the automotive network, but the operation is complicated, the adjustment of parameters is troublesome, and the most important thing is that it is impossible to judge the location of the network fault point. Secondly, the decoder is expensive. Through data communication, it is possible to finally determine whether the network signal can be analyzed and communicated, but it is also impossible to determine the location ...

AI Technical Summary

Problems solved by technology

There is no detection tool specifically for the automotive network in the market. Traditional oscilloscopes can detect the waveform of the automotive network, but the operation is complicated, the adjustment of parameters is troublesome, and the most important thing is that it is impossible to judge the location of the network fault point. Secondly, the decoder is expensive. Through data communication, it is possible to finally determine whether the network signal can be analyzed and communicated, but it is also impossible to determine the location of the network fault point.

Images