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A streamlined vehicle fault diagnosis and troubleshooting method

A fault diagnosis and fault maintenance technology, which is applied in the field of vehicle fault diagnosis and fault maintenance, and improves the efficiency of fault diagnosis and maintenance. Efficient effect

Active Publication Date: 2017-07-25
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects and problems of low diagnosis and maintenance efficiency in the prior art, and provide a process-based vehicle fault diagnosis and fault repair method with high diagnosis and maintenance efficiency

Method used

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  • A streamlined vehicle fault diagnosis and troubleshooting method
  • A streamlined vehicle fault diagnosis and troubleshooting method

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Experimental program
Comparison scheme
Effect test

Embodiment

[0061] A process-based vehicle fault diagnosis and troubleshooting method, which includes a fault diagnosis method and a fault repair method, and the fault diagnosis method includes reading a fault code, including the following steps:

[0062] The first step, fault diagnosis: first ask the driver about the fault phenomenon, then use the vehicle maintenance electronic device (diagnostic instrument) to read the fault code inside the ECU, and then perform the following processing respectively:

[0063] If there is a fault code: if the fault code clearly points to a certain part, then diagnose according to the part diagnosis method matched with the part to determine the fault point; if the fault code does not clearly point to a certain part, first judge according to the above fault phenomenon The control system to which it belongs shall be diagnosed according to the system diagnosis method matched with the control system to determine the fault point;

[0064] If there is no fault ...

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Abstract

A routing vehicle fault diagnosis and fault overhaul method comprises the fault diagnosis step and the fault overhaul step. The fault diagnosis step comprises the procedures that when a fault code exists, after whether the fault code definitely points to a part or not is judged, diagnosis is conducted and a fault point is determined according to a part diagnosis method or a system diagnosis method respectively; when no fault code exists, a vehicle driving dynamic condition test is conducted to determine the fault point. The fault overhaul step comprises the procedures that the fault point overhaul, the fault code elimination and testing after the overhaul are conducted circularly in sequence, and the overhaul is finished till a result of the testing after overhaul is normal; the fault point overhaul is an arbitrary combination of three kinds of overhaul technology, and the overhaul technology comprises inspection of the conditions of the part related to the fault point, inspection of the conditions of an electric control unit related to the fault point, and calling of the I / O or routine diagnosis function to judge the working performance of the electronic control unit and the part which are related to the fault point. The routing vehicle fault diagnosis and fault overhaul method has the advantages of being high in efficiency of fault diagnosis and fault overhaul, wide in range of application and low in cost.

Description

technical field [0001] The invention relates to a vehicle inspection and repair method, which belongs to the technical field of automobile electrical appliances, and in particular to a process-based vehicle fault diagnosis and fault repair method, which is particularly suitable for improving the efficiency of fault diagnosis and repair. Background technique [0002] With the increasing popularity of electronically controlled engines and the extensive application of CAN bus diagnostic equipment, vehicle after-sales maintenance diagnosis has gradually changed from consulting paper documents to using dedicated vehicle maintenance electronic devices (diagnostic instruments). [0003] In the past, maintenance personnel needed to carry after-sales service manuals, troubleshooting manuals, maintenance manuals and other materials when performing on-site after-sales service. After the popularization of special diagnostic instruments, it is convenient to read ECU label information, re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02G01M17/007
CPCG01M17/007G05B23/02G05B23/0224
Inventor 刘壮
Owner DONGFENG COMML VEHICLE CO LTD
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