CN104571092A - Flow-based fault diagnosis and fault maintenance method for vehicle - Google Patents
Flow-based fault diagnosis and fault maintenance method for vehicle Download PDFInfo
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- CN104571092A CN104571092A CN201410852962.XA CN201410852962A CN104571092A CN 104571092 A CN104571092 A CN 104571092A CN 201410852962 A CN201410852962 A CN 201410852962A CN 104571092 A CN104571092 A CN 104571092A
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- 238000000034 method Methods 0.000 title claims abstract description 74
- 238000003745 diagnosis Methods 0.000 title claims abstract description 48
- 238000012423 maintenance Methods 0.000 title claims abstract description 48
- 230000008439 repair process Effects 0.000 claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000013024 troubleshooting Methods 0.000 claims abstract description 20
- 230000004807 localization Effects 0.000 claims description 27
- 238000007689 inspection Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 16
- 238000002405 diagnostic procedure Methods 0.000 claims description 14
- 230000002159 abnormal effect Effects 0.000 claims description 13
- 230000005856 abnormality Effects 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 claims description 7
- 238000011309 routine diagnosis Methods 0.000 abstract 1
- 208000024891 symptom Diseases 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0224—Process history based detection method, e.g. whereby history implies the availability of large amounts of data
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Abstract
A method for diagnosing and repairing faults of a vehicle in a flow comprises fault diagnosis and fault repair. In the fault diagnosis: when a fault code exists, according to whether the fault code points to the part definitely or not, respectively diagnosing according to a part or system diagnosis method to determine a fault point; when no fault code exists, vehicle driving dynamic test is carried out to determine a fault point. In the troubleshooting: the method comprises the steps of sequentially and circularly carrying out the steps of repairing fault points, clearing fault codes and testing after the repairing until the testing result after the repairing is normal, and finishing the repairing until the repairing is finished, wherein the repairing fault points are any combination of three repairing processes of checking the condition of parts and electric control units related to the fault points or calling I/O or routine diagnosis functions to judge the working performance of the electric control units or the parts related to the fault points. The design has the advantages of high efficiency of fault diagnosis and maintenance, wide application range and low cost.
Description
Technical field
The present invention relates to a kind of repair method of vehicle, belong to car electrics technical field, particularly relate to a kind of fault diagnosis and trouble hunting method of vehicle of procedure, be specifically applicable to the diagnosis and the overhaul efficiency that improve fault.
Background technology
Along with the more and more universal of current electric-control motor and the extensive application of CAN diagnostic device, vehicle after-sales service diagnosis progressively changes from consulting paper document to the special car inspection and repair electronic installation (diagnostic equipment) of use.
Need when maintenance personal carries out after sale service at the scene in the past to carry the data such as after sale service handbook, malfunction elimination handbook and maintenance manual, can be very loaded down with trivial details once consult, work efficiency is also lower.After universal separate diagnostic instrument, can carry out reading ECU beacon information, diagnostic trouble code reading easily by diagnostic equipment and remove, read the work such as input/output date flow, more expanded function is more suitable for the diagnosis after sale of electric-control system.
But contact when lacking the concrete fault of process between each functional block of existing diagnostic equipment and logical relation, do not possess directiveness clearly, many times overhaul result and still must rely on maintenance personal's rich experience and finally judge, efficiency is lower.
Chinese patent, application publication number is CN103105846A, Shen Qing Publication day is that the application for a patent for invention on May 15th, 2013 discloses a kind of repair assisting system for car inspection and repair, symptom load module in it is provided for the input vehicle symptom information relevant to fault, diagnosis code module extracts the diagnostic trouble code from vehicle, diagnostic trouble code generates in response to the appearance of fault, Knowledge based engineering malfunctioning module is according to the potential cause of at least one identification vehicle trouble in symptom information and diagnostic trouble code, the Awaiting Parts that the identification of maintenance supplementary module is recommended and maintenance instruction are used for the reason of reconditioned vehicle fault, maintenance supplementary module communicates for obtaining the precedence table recommending Awaiting Parts and maintenance instruction with based on the malfunctioning module indicated, thus for maintenance vehicle fault.Although this invention can be diagnosed based on diagnostic trouble code, maintenance failure, it still has following defect:
First, this design by malfunctioning module identification symptom information or diagnostic trouble code to diagnose out the potential cause of vehicle trouble, but then can not relate to for concrete diagnostic procedure, and thus, the carrying out of the guidance diagnosis that it can not be concrete, causes the efficiency diagnosed to reduce;
Secondly, this design can recommend Awaiting Parts, maintenance instruction with reconditioned vehicle fault by the identification of maintenance supplementary module, but not much else, the trouble shooting point as how, then do not mention, thus completely, its can not be concrete the carrying out of guided maintenance, cause the efficiency of overhauling lower.
Summary of the invention
The object of the invention is to overcome the lower defect of the diagnosis, the overhaul efficiency that exist in prior art and problem, a kind of diagnosis, the fault diagnosis of vehicle of procedure that overhaul efficiency is higher and trouble hunting method are provided.
For realizing above object, technical solution of the present invention is: a kind of fault diagnosis of vehicle of procedure and trouble hunting method, and it comprises method for diagnosing faults and trouble hunting method, and method for diagnosing faults comprises read failure code, comprises the following steps:
The first step, fault diagnosis: first inquire phenomenon of the failure to driver, then read the diagnostic trouble code of ECU inside with car inspection and repair electronic installation, then carry out following process respectively:
If there is diagnostic trouble code: if certain part of sensing that diagnostic trouble code is clear and definite, then carry out diagnosing with the localization of faults according to the part diagnostic method supporting with this part; If diagnostic trouble code does not have certain part of clear and definite sensing, then first judge the control system belonging to it according to aforementioned phenomenon of the failure, then carry out diagnosing with the localization of faults according to the system diagnosis method supporting with this control system;
If non-fault code: first check historical failure information, then carry out vehicle traveling dynamic test with the localization of faults;
Second step, trouble hunting: overhaul to fix a breakdown to above-mentioned trouble spot.
Described vehicle traveling dynamic test of carrying out comprises following two kinds of operations with the localization of faults:
Break down in driving process code: carry out diagnosing with the localization of faults according to the part diagnostic method corresponding with diagnostic trouble code or system diagnosis method;
Diagnostic trouble code is not showed: if there is abnormality to occur, then undertaken diagnosing with the localization of faults by the diagnostic method corresponding with this abnormality in driving process; If state without exception occurs, then diagnose end, be considered as non-fault point.
Described car inspection and repair electronic installation is diagnostic equipment.
In the described first step, when reading the diagnostic trouble code of ECU inside with car inspection and repair electronic installation, if read multiple diagnostic trouble code simultaneously, and cannot specify these diagnostic trouble code whether relevant to phenomenon of the failure time, then according to following steps successively circular treatment: read failure code,---------read failure code---record trouble code---removes diagnostic trouble code to record trouble code to remove diagnostic trouble code ..., until read the diagnostic trouble code relevant to the phenomenon of the failure described in driver.
In described second step, describedly to overhaul to fix a breakdown to above-mentioned trouble spot, circulate successively according to following steps and carry out: trouble shooting point---------the test after maintenance that trouble shooting point---removes diagnostic trouble code---of test after maintenance of removing diagnostic trouble code ... until the result of test is normal after maintenance, now described trouble hunting terminates;
Described trouble shooting point refers to the combination in any of any one or they in following maintenance craft:
A, the electric interfaces state checking the parts that trouble spot relates to, resistance and signal voltage characteristic, if abnormal, then keep in repair or change the joint, contact pin or the parts that there is fault;
The real-time status of b, the electric interfaces checking the ECU (Electrical Control Unit) that trouble spot relates to, car load or engine wiring harness, if abnormal, then keep in repair or changes the ECU (Electrical Control Unit) interface, car load or the engine wiring harness that there is fault;
C, to call the serviceability of ECU (Electrical Control Unit) that I/O or routine diagnostic function relates to failure judgement point or parts from car inspection and repair electronic installation, if abnormal, then change the ECU (Electrical Control Unit) assembly or the electric components assembly that there is fault.
---remove diagnostic trouble code---in described second step, if trouble shooting point and, when the cycle index of test after maintenance is five times, still can not remove trouble spot, then contact the technique center of vehicle producer to continue maintenance.
Compared with prior art, beneficial effect of the present invention is:
1, in the fault diagnosis of the vehicle of a kind of procedure of the present invention and trouble hunting method when tracing trouble, point to carry out with or without diagnostic trouble code two kinds of situations, wherein, when there being diagnostic trouble code, then by whether clear and definite parts are divided into two kinds of situations to diagnose; When non-fault code, then travel dynamic test according to vehicle and carry out tracing trouble.As can be seen here, the design not only take into account all surface situation that fault can cause, and both provides clear, concrete diagnosis algorithm for often kind of surface appearance, and directiveness is very strong, is convenient to improve diagnosis efficiency.Therefore, fault diagnosis efficiency of the present invention is higher.
2, in the fault diagnosis of the vehicle of a kind of procedure of the present invention and trouble hunting method when trouble shooting,---removing diagnostic trouble code---overhauls cycling technique of rear test not only in large step, to devise trouble shooting point, and on trouble shooting point, devise three concrete maintenance crafts to tackle various different trouble spot, and these three maintenance crafts can combination in any to adapt to various fault, not only directiveness is very strong, improve the overhaul efficiency of the design, and range of application is wider.Therefore, the present invention not only overhaul efficiency is higher, and the scope of application is wider.
3, the fault diagnosis of the vehicle of a kind of procedure of the present invention and trouble hunting method by diagnose, repair method specific, by the standardization as much as possible of the operation steps of fault diagnosis, maintenance, change in detail, thus provide the extremely strong maintenance boot flow of logicality, the defect needing during existing after-sales service to carry a large amount of principle, wire harness drawing can not only be avoided, contribute to the efficiency improving after-sales service, and can reduce or cancel the orientation time of maintenance technician greatly, thus save human cost on the whole.Therefore, work efficiency of the present invention is higher, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the operational flowchart of fault diagnosis in the present invention.
Fig. 2 is the operational flowchart of trouble hunting in the present invention.
Embodiment
Illustrate that the present invention is further detailed explanation with embodiment below in conjunction with accompanying drawing.
See figure 1 – Fig. 2, a kind of fault diagnosis of vehicle of procedure and trouble hunting method, it comprises method for diagnosing faults and trouble hunting method, and method for diagnosing faults comprises read failure code, comprises the following steps:
The first step, fault diagnosis: first inquire phenomenon of the failure to driver, then read the diagnostic trouble code of ECU inside with car inspection and repair electronic installation, then carry out following process respectively:
If there is diagnostic trouble code: if certain part of sensing that diagnostic trouble code is clear and definite, then carry out diagnosing with the localization of faults according to the part diagnostic method supporting with this part; If diagnostic trouble code does not have certain part of clear and definite sensing, then first judge the control system belonging to it according to aforementioned phenomenon of the failure, then carry out diagnosing with the localization of faults according to the system diagnosis method supporting with this control system;
If non-fault code: first check historical failure information, then carry out vehicle traveling dynamic test with the localization of faults;
Second step, trouble hunting: overhaul to fix a breakdown to above-mentioned trouble spot.
Described vehicle traveling dynamic test of carrying out comprises following two kinds of operations with the localization of faults:
Break down in driving process code: carry out diagnosing with the localization of faults according to the part diagnostic method corresponding with diagnostic trouble code or system diagnosis method;
Diagnostic trouble code is not showed: if there is abnormality to occur, then undertaken diagnosing with the localization of faults by the diagnostic method corresponding with this abnormality in driving process; If state without exception occurs, then diagnose end, be considered as non-fault point.
Described car inspection and repair electronic installation is diagnostic equipment.
In the described first step, when reading the diagnostic trouble code of ECU inside with car inspection and repair electronic installation, if read multiple diagnostic trouble code simultaneously, and cannot specify these diagnostic trouble code whether relevant to phenomenon of the failure time, then according to following steps successively circular treatment: read failure code,---------read failure code---record trouble code---removes diagnostic trouble code to record trouble code to remove diagnostic trouble code ..., until read the diagnostic trouble code relevant to the phenomenon of the failure described in driver.
In described second step, describedly to overhaul to fix a breakdown to above-mentioned trouble spot, circulate successively according to following steps and carry out: trouble shooting point---------the test after maintenance that trouble shooting point---removes diagnostic trouble code---of test after maintenance of removing diagnostic trouble code ... until the result of test is normal after maintenance, now described trouble hunting terminates;
Described trouble shooting point refers to the combination in any of any one or they in following maintenance craft:
A, the electric interfaces state checking the parts that trouble spot relates to, resistance and signal voltage characteristic, if abnormal, then keep in repair or change the joint, contact pin or the parts that there is fault;
The real-time status of b, the electric interfaces checking the ECU (Electrical Control Unit) that trouble spot relates to, car load or engine wiring harness, if abnormal, then keep in repair or changes the ECU (Electrical Control Unit) interface, car load or the engine wiring harness that there is fault;
C, to call the serviceability of ECU (Electrical Control Unit) that I/O or routine diagnostic function relates to failure judgement point or parts from car inspection and repair electronic installation, if abnormal, then change the ECU (Electrical Control Unit) assembly or the electric components assembly that there is fault.
---remove diagnostic trouble code---in described second step, if trouble shooting point and, when the cycle index of test after maintenance is five times, still can not remove trouble spot, then contact the technique center of vehicle producer to continue maintenance.
Principle of the present invention is described as follows:
One, fault diagnosis:
1, phenomenon of the failure is inquired to driver:
When carrying out fault diagnosis to vehicle, consider it may is some fault caused because of the misoperation of driver, therefore maintenance personal first will can produce this fault when reaching the spot under driver inquires phenomenon of the failure and which kind of situation, then just read failure code.
If 2 diagnostic trouble code do not have certain part of clear and definite sensing, then first judge the control system belonging to it according to aforementioned phenomenon of the failure, then carry out diagnosing with the localization of faults according to the system diagnosis method supporting with this control system:
Such as, fault that engine rail pressure is on the low side, it only shows that the high pressure oil rail pressure of engine system is abnormal but does not indicate (being likely that component of machine damages) of specifically by which parts being caused, now, in order to determine concrete place, trouble spot, in diagnostic method, just devise control system belonging to first judging according to phenomenon of the failure, then carry out diagnosing the mode with the localization of faults according to the system diagnosis method supporting with this control system.
3, carry out vehicle and travel dynamic test with the localization of faults:
Give an example, some fault as motor car engine only have when its be operated in the higher and rotating speed of water temperature comparatively Gao Shicai there will be, and can recover normal through idle running after a while, if this kind of fault needs reproduction when keeping in repair, need vehicle to carry out dynamic test (traveling of setting out on a journey) and image data.Such as, driver reflects that engine occasional difficulty starts or over-emitting black exhaust, starts normal during maintenance, by checking the historical failure information stored in controller, have and necessarily may judge because driver forgets that carrying out fuel-firing preheating causes, and in conjunction with traveling of setting out on a journey, thus determines fault when starting.
4, when reading the diagnostic trouble code of ECU inside with car inspection and repair electronic installation, if read multiple diagnostic trouble code simultaneously:
Controller ECU inside can store all failure messages once occurred, even some maloperations of user oneself also can by ECU record, as the user's sensor of some easy losses of charged for replacement or actuator voluntarily, the open fault of this sensor or actuator will be recorded as by ECU.The incoherent diagnostic trouble code of phenomenon of the failure described for avoiding these and driver disturbs the final judgement of maintenance personal, more again reads a diagnostic trouble code after once must removing to the fault of controller record.When upper once Read fault code, if chance failure, even also need to reproduce fault." read multiple failure code " just a kind of special circumstances (be generally feedback fault then only a corresponding diagnostic trouble code) of " read failure code " in the first step.
Two, trouble hunting:
This electric component repair process be one to flow process general during the maintenance of most component failure, also need in actual use to consider the complexity of each fault when maintenance personal operates, follow by letter to difficult principle, can suitably adjust in the design of maintenance step some special faults, employing quantity, the employing order of three maintenance crafts mentioned as the design can adjust according to actual.
Embodiment:
The fault diagnosis of the vehicle of procedure and a trouble hunting method, it comprises method for diagnosing faults and trouble hunting method, and method for diagnosing faults comprises read failure code, comprises the following steps:
The first step, fault diagnosis: first inquire phenomenon of the failure to driver, then use car inspection and repair electronic installation (diagnostic equipment) to read the diagnostic trouble code of ECU inside, then carry out following process respectively:
If there is diagnostic trouble code: if certain part of sensing that diagnostic trouble code is clear and definite, then carry out diagnosing with the localization of faults according to the part diagnostic method supporting with this part; If diagnostic trouble code does not have certain part of clear and definite sensing, then first judge the control system belonging to it according to aforementioned phenomenon of the failure, then carry out diagnosing with the localization of faults according to the system diagnosis method supporting with this control system;
If non-fault code: first check historical failure information, then carry out vehicle traveling dynamic test with the localization of faults; Described vehicle traveling dynamic test of carrying out comprises following two kinds of operations with the localization of faults: break down in driving process code: carry out diagnosing with the localization of faults according to the part diagnostic method corresponding with diagnostic trouble code or system diagnosis method; Diagnostic trouble code is not showed: if there is abnormality to occur, then undertaken diagnosing with the localization of faults by the diagnostic method corresponding with this abnormality in driving process; If state without exception occurs, then diagnose end, be considered as non-fault point;
Second step, trouble hunting: overhaul to fix a breakdown to above-mentioned trouble spot, circulate successively according to following steps and carry out: trouble shooting point and---remove diagnostic trouble code and---after maintenance, test---test after maintenance that trouble shooting point---removes diagnostic trouble code---... until the result of test is normal after maintenance, now described trouble hunting terminates; Described trouble shooting point refers to the combination in any of any one or they in following maintenance craft:
A, the electric interfaces state checking the parts that trouble spot relates to, resistance and signal voltage characteristic, if abnormal, then keep in repair or change the joint, contact pin or the parts that there is fault;
The real-time status of b, the electric interfaces checking the ECU (Electrical Control Unit) that trouble spot relates to, car load or engine wiring harness, if abnormal, then keep in repair or changes the ECU (Electrical Control Unit) interface, car load or the engine wiring harness that there is fault;
C, to call the serviceability of ECU (Electrical Control Unit) that I/O or routine diagnostic function relates to failure judgement point or parts from car inspection and repair electronic installation, if abnormal, then change the ECU (Electrical Control Unit) assembly or the electric components assembly that there is fault.
Claims (6)
1. the fault diagnosis of the vehicle of procedure and a trouble hunting method, it comprises method for diagnosing faults and trouble hunting method, and method for diagnosing faults comprises read failure code, it is characterized in that comprising the following steps:
The first step, fault diagnosis: first inquire phenomenon of the failure to driver, then read the diagnostic trouble code of ECU inside with car inspection and repair electronic installation, then carry out following process respectively:
If there is diagnostic trouble code: if certain part of sensing that diagnostic trouble code is clear and definite, then carry out diagnosing with the localization of faults according to the part diagnostic method supporting with this part; If diagnostic trouble code does not have certain part of clear and definite sensing, then first judge the control system belonging to it according to aforementioned phenomenon of the failure, then carry out diagnosing with the localization of faults according to the system diagnosis method supporting with this control system;
If non-fault code: first check historical failure information, then carry out vehicle traveling dynamic test with the localization of faults;
Second step, trouble hunting: overhaul to fix a breakdown to above-mentioned trouble spot.
2. the fault diagnosis of the vehicle of a kind of procedure according to claim 1 and trouble hunting method, is characterized in that: described in carry out vehicle and travel dynamic test and comprise following two kinds of operations with the localization of faults:
Break down in driving process code: carry out diagnosing with the localization of faults according to the part diagnostic method corresponding with diagnostic trouble code or system diagnosis method;
Diagnostic trouble code is not showed: if there is abnormality to occur, then undertaken diagnosing with the localization of faults by the diagnostic method corresponding with this abnormality in driving process; If state without exception occurs, then diagnose end, be considered as non-fault point.
3. the fault diagnosis of the vehicle of a kind of procedure according to claim 1 and 2 and trouble hunting method, is characterized in that: described car inspection and repair electronic installation is diagnostic equipment.
4. the fault diagnosis of the vehicle of a kind of procedure according to claim 1 and 2 and trouble hunting method, it is characterized in that: in the described first step, when reading the diagnostic trouble code of ECU inside with car inspection and repair electronic installation, if read multiple diagnostic trouble code simultaneously, and cannot specify these diagnostic trouble code whether relevant to phenomenon of the failure time, then according to following steps successively circular treatment: read failure code,---------read failure code---record trouble code---removes diagnostic trouble code to record trouble code to remove diagnostic trouble code until read the diagnostic trouble code relevant to the phenomenon of the failure described in driver.
5. the fault diagnosis of the vehicle of a kind of procedure according to claim 1 and 2 and trouble hunting method, it is characterized in that: in described second step, describedly to overhaul to fix a breakdown to above-mentioned trouble spot, circulate successively according to following steps and carry out: trouble shooting point---------the test after maintenance that trouble shooting point---removes diagnostic trouble code---of test after maintenance of removing diagnostic trouble code ... until the result of test is normal after maintenance, now described trouble hunting terminates;
Described trouble shooting point refers to the combination in any of any one or they in following maintenance craft:
A, the electric interfaces state checking the parts that trouble spot relates to, resistance and signal voltage characteristic, if abnormal, then keep in repair or change the joint, contact pin or the parts that there is fault;
The real-time status of b, the electric interfaces checking the ECU (Electrical Control Unit) that trouble spot relates to, car load or engine wiring harness, if abnormal, then keep in repair or changes the ECU (Electrical Control Unit) interface, car load or the engine wiring harness that there is fault;
C, to call the serviceability of ECU (Electrical Control Unit) that I/O or routine diagnostic function relates to failure judgement point or parts from car inspection and repair electronic installation, if abnormal, then change the ECU (Electrical Control Unit) assembly or the electric components assembly that there is fault.
6. the fault diagnosis of the vehicle of a kind of procedure according to claim 5 and trouble hunting method, it is characterized in that: in described second step,---diagnostic trouble code is removed---when the cycle index of test after maintenance is five times if trouble shooting point, still can not remove trouble spot, then contact the technique center of vehicle producer to continue maintenance.
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| CN112578194A (en) * | 2019-09-29 | 2021-03-30 | 重庆长安汽车股份有限公司 | Automobile electrical system troubleshooting method |
| CN112578194B (en) * | 2019-09-29 | 2024-03-29 | 重庆长安汽车股份有限公司 | Automobile electrical system fault troubleshooting method |
| CN112083708A (en) * | 2020-08-07 | 2020-12-15 | 盐城工学院 | Fault diagnosis method for automobile electric control system |
| CN112445201A (en) * | 2020-11-19 | 2021-03-05 | 东风汽车集团有限公司 | Remote troubleshooting and fault positioning method and device |
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