CN106557082B - Error code detection and recording method and the vehicle electrically controlling unit of vehicle electrically controlling unit - Google Patents
Error code detection and recording method and the vehicle electrically controlling unit of vehicle electrically controlling unit Download PDFInfo
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- CN106557082B CN106557082B CN201510632522.8A CN201510632522A CN106557082B CN 106557082 B CN106557082 B CN 106557082B CN 201510632522 A CN201510632522 A CN 201510632522A CN 106557082 B CN106557082 B CN 106557082B
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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
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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Abstract
A kind of the error code detection and recording method of vehicle electrically controlling unit, comprising: S10: electronic control unit carries out fault detection, when detecting failure, into judgment step S21~S23；S21: electronic control unit judges whether firing key is in CRANK state, if so, electronic control unit does not record any error code；S22: electronic control unit judges whether firing key is in IGN ON state no more than the first preset time, if so, electronic control unit does not record network communication dependent failure code；S23: electronic control unit judges whether firing key is in ACC state or IGN OFF state, if so, electronic control unit does not record network communication dependent failure code；S30: if the failure detected is not belonging in each judgment step the not situation of record, the failure that electronic control unit will test carries out error code record.Error code detection of the invention and recording method, it is contemplated that influence of the vehicle accidental conditions to fault setting can be treated as failure to avoid some normal phenomenons, solve the problems, such as error code wrong report.
Description
Technical field
The present invention relates to the technical field of automotive electronics and vehicle diagnosis, especially a kind of vehicle electrically controlling unit and its failure
Code detection and recording method.
Background technique
Vehicle diagnosis be vehicle ECU (Electronic Control Unit, electronic control unit, or for controller, section
Point) real-time monitoring itself working condition in normal work, controller input/output port is detected, once discovery failure can will
The memory that DTC (Diagnostic Trouble Code, diagnostic trouble code) and other failure diagnosis informations deposit controller carry
In, while deciding whether to light trouble lamp according to the weight grade of failure.If desired light alarm lamp, then it will by network
Signal issues instrument board, lights alarm lamp, prompts driver's on-call maintenance and maintenance.
Such as network failure, most typical network failure has message loss failure and invalid data failure, main engine plants
A message loss failure and invalid data failure can be at least defined for some node in failure definition.
In another example being directed to supply voltage failure and ECU itself input and output failure, when voltage occurs abnormal, electricity will record
The normal failure of reduce off-flavor；It will record solenoid valve or electrical fault when solenoid valve or motor occur abnormal.
Mode defined above often ignores phenomenon of the failure caused by falling vehicle actual operating mode, but belongs to and just often occur
As being not belonging to the failure of ECU.For example engine start moment, voltage can be dragged down suddenly, ECU may report " brownout by mistake
Error code "；When firing key just gets to ON, many ECU can be powered on and initialized, and need to retransmit effective report after a certain period of time
Text is gone out, and each ECU initialization time is different, and fast node may misdescription record " message loss " or " invalid data "
Error code；When voltage occurs abnormal, certain actuators may be directly resulted in because supplying undertension due to operation irregularity, ECU
It will record actuator failures.
However, the above phenomena is all normal phenomenon, but ECU treats these phenomenons as failure, has recorded event
The case where hindering code, or even light trouble lamp, some error code is caused to be reported by mistake, thus to driver bring it is panic with not
Peace, affects the brand effect of vehicle.
Summary of the invention
It is existing to solve the purpose of the present invention is to provide a kind of vehicle electrically controlling unit and its error code detection and recording method
Have in the presence of technology the problem of some normal phenomenons are treated as failure, error code are caused to be reported by mistake.
The embodiment of the present invention provides the error code detection and recording method of a kind of vehicle electrically controlling unit, comprising:
S10: electronic control unit carries out fault detection, when detecting failure, into judgment step S21~S23；
S21: electronic control unit judges whether firing key is in CRANK state, if so, electronic control unit does not record any failure
Code；
S22: electronic control unit judges whether firing key is in IGN ON state no more than the first preset time, if so, electric
Control unit does not record network communication dependent failure code；
S23: electronic control unit judges whether firing key is in ACC state or IGN OFF state, if so, electronic control unit
Network communication dependent failure code is not recorded；
S30: if the failure detected is not belonging in each judgment step the not situation of record, what electronic control unit will test
Failure carries out error code record.
Further, further include judgment step S24 when detecting failure: electronic control unit judges whether firing key exits
CRANK state is no more than the second preset time, if so, electronic control unit does not record any error code.
It further, further include sentencing when detecting failure, and when electronic control unit judges that firing key is in IGN ON state
Disconnected step S25: electronic control unit judges whether the supply voltage of itself is abnormal, if the supply voltage of electronic control unit is abnormal, automatically controlled list
First recording voltage abnormal failure code, does not record other error code.
Further, when detecting failure, electronic control unit judges that firing key is in IGN ON state, and electronic control unit
Further include judgment step S26 when exception occurred in supply voltage: electronic control unit judges whether supply voltage recovery is normally no more than
Third preset time, if so, electronic control unit recording voltage abnormal failure code, does not record other error code.
Further, which is 5 seconds, which is 3 seconds, which is 3 seconds.
The embodiment of the present invention also provides a kind of vehicle electrically controlling unit, comprising:
Fault detection module, for carrying out fault detection；
Ignition key status judgment module, for judging firing key state in which；
Fault logging module, for according to firing key state in which, recording the error code of detected failure.
Further, when the ignition key status judgment module judges that firing key is in CRANK state, failure note
Record module does not record any error code；When the ignition key status judgment module judges that firing key is in IGN ON state and does not surpass
When crossing the first preset time, which does not record network communication dependent failure code；When the ignition key status judges
When module judges that firing key is in ACC state or IGN OFF state, which does not record network communication correlation
Error code；When the ignition key status judgment module judges that firing key exits CRANK state no more than the second preset time,
The fault logging module does not record any error code.
Further, which further includes voltage status judgment module, for being in IGN in firing key
When ON state, judge whether the supply voltage of electronic control unit is abnormal；When the voltage status judgment module judges the confession of electronic control unit
When piezoelectric voltage exception, which does not record other error code.
Further, when the voltage status judgment module judges that the supply voltage of electronic control unit abnormal and recovery was occurring just
When being often also no more than third preset time, which does not record other error code.
Further, which is 5 seconds, which is 3 seconds, which is 3 seconds.
The error code of vehicle electrically controlling unit provided in this embodiment detects and recording method, when carrying out vehicle diagnosis, only
The judgment step of above-mentioned ignition key status and supply voltage state need to be inserted into the original fault judgment method of each ECU
, error code detection and recording method consider influence of the vehicle accidental conditions to fault setting, can not only protect
Card maintenance personal quickly checks failure, moreover it is possible to avoid some normal phenomenons from treating as failure, solve error code wrong report
The problem of, it avoids attracting fear to driver, greatly improves the brand effect of vehicle.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Detailed description of the invention
Fig. 1 is the decision flow chart of the error code detection and recording method of vehicle electrically controlling unit in the embodiment of the present invention.
Fig. 2 is the function structure chart of vehicle electrically controlling unit in the embodiment of the present invention.
Specific embodiment
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, it is as follows that the present invention is described in detail.
As the electric appliance used on automobile is more and more, function becomes increasingly complex, especially controller LAN (CAN) skill
The introducing of art, so that traditional sense organ and experience by maintenance personal, is aided with the general utility tools such as multimeter to analyze vapour
The mode of vehicle failure becomes more and more difficult.In order to solve this problem, the electronic control unit of automobile (ECU, or for controller,
Node) it has been internally integrated diagnostic function.ECU can real-time monitoring itself input/output port and the inside ECU correlation when working normally
Information, once discovery failure, it will failure is judged, and records corresponding error code, while according to the weight etc. of failure
Grade decides whether to light trouble light to achieve the purpose that remind driver.
The purpose of diagnostic design is to check failure using diagnostic function, improves exploitation, trial-production, production product quality and after sale
Service quality；But accident design is unreasonable, the case where error code may being caused to report by mistake, brings interference to driver, and
Influence vehicle brand effect.The embodiment of the present invention provides the error code detection and recording method of a kind of vehicle electrically controlling unit, with solution
The problem of certainly above-mentioned error code is reported by mistake.
Fig. 1 is the decision flow chart of the error code detection and recording method of vehicle electrically controlling unit in the embodiment of the present invention, is asked
Join Fig. 1, error code detection includes: with recording method
S10: electronic control unit carries out fault detection, when detecting failure, into judgment step S21~S23.
Specifically, electronic control unit can be the various ECU (controller) in vehicle, such as engine controller, clutch
Controller, gearbox control etc..Each controller real-time monitoring itself working condition in normal work, detects controller
Input/output port, to carry out fault detection.Electronic control unit, can be by the preset time interval period when carrying out fault detection
Property carry out, such as at regular intervals carry out primary fault detection, can also carry out according to other setting means, not do herein
It limits.Herein, the step of fault detection can with it is existing identical, this will not be repeated here.When detecting failure, into judgment step
S21~S23.
S21: electronic control unit judges whether firing key is in CRANK state, if so, electronic control unit does not record any failure
Code.
There are four types of states, respectively IGN OFF state, ACC state, IGN ON state, CRANK state for firing key tool.
Engine start when firing key is located at CRANK state, in engine start moment, vehicle voltage can be pulled low,
Lower than ECU normal range of operation, each ECU will record the error code of brownout.And it is normal phenomenon that voltage at this time is low, no
It is phenomenon of the failure.To avoid ECU from reporting the error code of brownout by mistake, recording voltage should be forbidden abnormal and other any error code.
In the present invention, when detecting that failure, electronic control unit judge that firing key is in CRANK state, electronic control unit does not record any
Error code.
S22: electronic control unit judges whether firing key is in IGN ON state no more than the first preset time, if so, electric
Control unit does not record network communication dependent failure code.
When firing key is located at IGN (ignition) ON state, all ECU of vehicle are both powered up, but after just powering on, are owned
ECU can be initialized first, then again toward accurate signal is sent on network, only sent during initialization default value to
On network, and default value is likely to be invalid value.And the time of each ECU initialization is different, first completes the ECU of initialization
The invalidating signal error code of other ECU may then be reported by mistake.So, it is desirable that firing key is in IGN ON certain time (such as 5
Second) after, that is, after the completion of ensuring that all ECU are initialized, ability normal recordings network communication dependent failure code.In the present invention, work as inspection
Failure is measured, it is automatically controlled when electronic control unit judges that firing key is in IGN ON state no more than the first preset time (such as 5 seconds)
Unit does not record network communication dependent failure code.That is, when firing key is in IGN ON state and is more than first default
Between (such as 5 seconds) after, the error code for the network communication dependent failure that electronic control unit ability normal recordings detect.Wherein, network is logical
Interrogating dependent failure includes CAN Bus off failure, message loss failure, invalid data failure etc..
In addition, as long as firing key is in IGN ON state, regardless of whether when being more than first default in IGN ON state
Between (such as 5 seconds), if the failure detected is not network communication dependent failure, such as what is detected is ECU internal fault, then
ECU is still normally carried out error code record.
S23: electronic control unit judges whether firing key is in ACC state or IGN OFF state, if so, electronic control unit
Network communication dependent failure code is not recorded.
When firing key is located at IGN OFF state, engine misses, most of ECU do not work at this time, only only a few
ECU (such as EPB, Electrical Parking Brake, electronic brake) work.The EPB of working condition can be supervised in real time
The state of other ECU on network is controlled, and at this point, other ECU normal conditions are exactly not work, signal will not be sent and come out.At this point,
If EPB records the message loss failure of other ECU, error code is exactly reported by mistake.So, it is desirable that firing key is in IGN OFF
When, do not allow to record network communication dependent failure code, to avoid the network failure for reporting other nodes by mistake.In the present invention, work as detection
To failure, when electronic control unit judges that firing key is in IGN OFF state, electronic control unit does not record network communication dependent failure
Code.
When firing key is located at ACC state, engine misses, only piece attachments (such as stereo set) are powered at this time,
There was only minority ECU work at this time, most of ECU does not work.Therefore, ACC state and IGN OFF state be similarly, it is desirable that igniting
When key is in ACC state, do not allow to record network communication dependent failure code, to avoid the network failure for reporting other nodes by mistake.
In the present invention, when detecting that failure, electronic control unit judge that firing key is in ACC state, it is logical that electronic control unit does not record network
Interrogate dependent failure code.
In addition, IGN OFF state or ACC state are in firing key, if the failure detected is not network communication phase
Failure is closed, such as what is detected is ECU internal fault, then ECU is still normally carried out error code record.
Further, when detecting failure, and after electronic control unit judges that firing key is exited from CRANK state, further include
Into judgment step S24: electronic control unit judges whether firing key exits CRANK state no more than the second preset time, if so,
Electronic control unit does not record any error code.
In engine startup, when firing key exits and returns to IGN ON state from CRANK state, in order to protect
Card voltage can restore completely, it is desirable that exit certain time in (such as 3 seconds) from CRANK state, recording voltage should be forbidden abnormal
And other any error code.In the present invention, when detecting that failure, electronic control unit judge that firing key exits CRANK state and do not surpass
When crossing the second preset time (such as 3 seconds), electronic control unit does not record any error code.That is, being exited in firing key
CRANK state is more than the error code for the failure that electronic control unit ability normal recordings detect after the second preset time (such as 3 seconds).
Further, when detecting failure, and it is more than 5 seconds, simultaneously that electronic control unit, which judges that firing key is in IGN ON state,
And it is not in ACC state or IGN OFF state, further include entering judgment step S25: electronic control unit judges the power supply of itself
Whether voltage is abnormal, if the supply voltage of electronic control unit is abnormal, electronic control unit recording voltage abnormal failure code is not recorded other
Error code.
Most of ECU normal working voltage ranges are 9~16V, give each ECU by vehicle storage battery power supply, but each
The position of ECU is different, and certain pressure drop is had from battery to the end ECU.Battery is also possible to feed (i.e. electricity occur
Pressure is insufficient) the case where, cause the supply voltage of ECU to occur abnormal.Whether the supply voltage of ECU is abnormal to pass through monitoring certainly by ECU
Oneself input voltage value judges.
When firing key is in IGN ON state, each ECU monitors the input voltage value of oneself.When electric voltage exception, supply
Can be insufficient to the voltage of ECU itself component, cause all parts work abnormal, at this point, ECU goes the work of monitoring all parts
It just will be considered that there are failures for itself component when performance, to report error code by mistake.At this time, it is only necessary to report the error code of electric voltage exception
, this is fault rootstock, as long as the supply voltage of ECU restores normal, the component of ECU is also working properly.Therefore originally
In invention, failure is detected when firing key is in IGN ON state, if ECU judges that the supply voltage appearance of its own is different
Often, ECU recording voltage abnormal failure code, does not record other error code.
Further, when detecting failure, it is more than 5 seconds and not that electronic control unit, which judges that firing key is in IGN ON state,
It is to be in ACC state or IGN OFF state, and the supply voltage of electronic control unit occurred extremely, further included entering judgement
Step S26: electronic control unit judges that supply voltage restores normal and whether is no more than third preset time, if so, electronic control unit is only remembered
Electric voltage exception error code is recorded, does not record other error code.
To avoid spread of voltage, error code is caused to be reported by mistake, it is desirable that after there is electric voltage exception, supply voltage restores ECU
In normal certain time (such as 3 seconds), recording voltage abnormal failure code does not record other error code.Therefore in the present invention,
Failure is detected when firing key is in IGN ON state, if electronic control unit judges to restore just after exception occurs in supply voltage
Often also it is no more than third preset time (such as 3 seconds), ECU recording voltage abnormal failure code does not record other error code.
S30: if the failure detected is not belonging in each judgment step the not situation of record, what electronic control unit will test
Failure carries out error code record.
After ECU detects failure in step slo, above-mentioned judgment step S21~S26 is undergone, if the failure detected is not
Belong to the various situations not recorded in above-mentioned judgment step S21~S26, then ECU patrols the failure according to normal breakdown judge
It collects and is determined and record error code.
For example, the failure detected in step slo as ECU is invalid data failure, if the invalid data failure be
It is more than to occur afterwards (by taking the first preset time is set as 5 seconds as an example) for 5 seconds that firing key, which is in IGN ON state, then ECU will be recorded
The error code of the invalid data failure.But if the invalid data failure is to be in the 4th of IGN ON state in firing key
Second occurs, then ECU does not record the error code of the invalid data failure.
In another example when the ECU failure detected in step slo is electric voltage exception failure and other failures, other failures
Including ECU internal fault, network communication dependent failure etc., if the electric voltage exception failure and other failures are in ECU supply voltage
Occur in the case where appearance exception, then ECU only records the error code of the electric voltage exception failure, does not record the event of other failures
Hinder code.
The error code of vehicle electrically controlling unit provided in this embodiment detects and recording method, when carrying out vehicle diagnosis, only
The judgment step of above-mentioned ignition key status and supply voltage state need to be inserted into the original fault judgment method of each ECU
, error code detection and recording method consider influence of the vehicle accidental conditions to fault setting, can not only protect
Card maintenance personal quickly checks failure, moreover it is possible to avoid some normal phenomenons from treating as failure, solve error code wrong report
The problem of, it avoids attracting fear to driver, greatly improves the brand effect of vehicle.
Fig. 2 is the function structure chart of vehicle electrically controlling unit in the embodiment of the present invention, please join Fig. 2, the vehicle electrically controlling unit packet
It includes:
Fault detection module 11, for carrying out fault detection；
Ignition key status judgment module 12, for judging firing key state in which；
Fault logging module 14, for recording or not recording detected event according to firing key state in which
The error code of barrier.
Specifically, when the ignition key status judgment module 12 judges that firing key is in CRANK state, failure note
Record module 14 does not record any error code；When the ignition key status judgment module 12 judges that firing key is in IGN ON state
When no more than the first preset time, which does not record network communication dependent failure code；When the firing key shape
When state judgment module 12 judges that firing key is in ACC state or IGN OFF state, which does not record net
Network communicates dependent failure code；When the ignition key status judgment module 12 judges that firing key exits CRANK state and is no more than the
When two preset times, which does not record any error code.
Further, which further includes voltage status judgment module 13, for being in IGN in firing key
When ON state, judge whether the supply voltage of electronic control unit is abnormal；When the voltage status judgment module 13 judges electronic control unit
When supply voltage exception, 14 recording voltage abnormal failure codes of the fault logging module do not record other error code.
Further, when the voltage status judgment module 13 judges that abnormal and recovery occurred in the supply voltage of electronic control unit
When being normally also no more than third preset time, 14 recording voltage abnormal failure codes of the fault logging module do not record other events
Hinder code.
Specifically, which is 5 seconds, which is 3 seconds, which is 3 seconds.
The vehicle electrically controlling unit and the detection of above-mentioned error code and recording method embodiment that the embodiment provides belong to same structure
Think, specific implementation process is detailed in embodiment of the method, and which is not described herein again.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in computer-readable storage
In medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
It is right according to the technical essence of the invention for the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention
Any simple modification, equivalent change and modification made by above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (9)
1. a kind of error code of vehicle electrically controlling unit detects and recording method characterized by comprising
S10: electronic control unit carries out fault detection, when detecting failure, into judgment step S21~S23；
S21: electronic control unit judges whether firing key is in CRANK state, if so, electronic control unit does not record any error code；
S22: electronic control unit judges whether firing key is in IGN ON state no more than the first preset time, if so, automatically controlled list
Member does not record network communication dependent failure code；
S23: electronic control unit judges whether firing key is in ACC state or IGN OFF state, if so, electronic control unit is not remembered
Record network communication dependent failure code；
S30: if the failure detected is not belonging in each judgment step the not situation of record, the failure that electronic control unit will test
Carry out error code record.
2. the error code of vehicle electrically controlling unit as described in claim 1 detects and recording method, it is characterised in that: when detecting
Failure, and after electronic control unit judges that firing key is exited from CRANK state, further include judgment step S24: electronic control unit judges a little
Whether fiery key exits CRANK state no more than the second preset time, if so, electronic control unit does not record any error code.
3. the error code of vehicle electrically controlling unit as claimed in claim 2 detects and recording method, it is characterised in that: when detecting
Failure, and electronic control unit judges that firing key is in IGN ON state and is more than 5 seconds and not is in ACC state or IGN
Further include judgment step S25 when OFF state: electronic control unit judges whether the supply voltage of itself is abnormal, if the confession of electronic control unit
Piezoelectric voltage is abnormal, and electronic control unit recording voltage abnormal failure code does not record other error code.
4. the error code of vehicle electrically controlling unit as claimed in claim 3 detects and recording method, it is characterised in that: when detecting
Failure, electronic control unit judge that firing key is in IGN ON state and is more than 5 seconds and is not in ACC state or IGN OFF shape
State, and when exception occurred in the supply voltage of electronic control unit, further include judgment step S26: electronic control unit judges supply voltage
Restore normal and whether be no more than third preset time, if so, electronic control unit recording voltage abnormal failure code, does not record other events
Hinder code.
5. the error code of vehicle electrically controlling unit as claimed in claim 4 detects and recording method, it is characterised in that: this is first pre-
If the time is 5 seconds, which is 3 seconds, which is 3 seconds.
6. a kind of vehicle electrically controlling unit characterized by comprising
Fault detection module (11), for carrying out fault detection；
Ignition key status judgment module (12), for judging firing key state in which；
Fault logging module (14), for according to firing key state in which, recording the error code of detected failure, when
When the ignition key status judgment module (12) judges that firing key is in CRANK state, which does not remember
Record any error code；When the ignition key status judgment module (12) judges that firing key is in IGN ON state no more than first
When preset time, which does not record network communication dependent failure code；When the ignition key status judges mould
When block (12) judges that firing key is in ACC state or IGN OFF state, it is logical which does not record network
Interrogate dependent failure code；When the ignition key status judgment module (12) judges that firing key exits CRANK state no more than second
When preset time, which does not record any error code.
7. vehicle electrically controlling unit as claimed in claim 6, which is characterized in that the vehicle electrically controlling unit further includes that voltage status is sentenced
Whether disconnected module (13), the supply voltage for when firing key is in IGN ON state, judging electronic control unit are abnormal；When this
When voltage status judgment module (13) judges the supply voltage exception of electronic control unit, fault logging module (14) recording voltage
Abnormal failure code does not record other error code.
8. vehicle electrically controlling unit as claimed in claim 7, which is characterized in that when the voltage status judgment module (13) judges electricity
When there is exception and restored normally also to be no more than third preset time in the supply voltage of control unit, the fault logging module (14)
Recording voltage abnormal failure code, does not record other error code.
9. vehicle electrically controlling unit as claimed in claim 8, which is characterized in that first preset time is 5 seconds, this is second default
Time is 3 seconds, which is 3 seconds.
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| CN108063708A (en) * | 2017-11-28 | 2018-05-22 | 重庆长安汽车股份有限公司 | A kind of CAN communication loses method for diagnosing faults and electronic control unit |
| CN110481464A (en) * | 2019-08-30 | 2019-11-22 | 吉利汽车研究院（宁波）有限公司 | A kind of control method and its device of vehicle low-voltage alarm shielding |
| CN110750087B (en) * | 2019-09-25 | 2021-09-10 | 浙江合众新能源汽车有限公司 | EOL detection method and device for avoiding mistaken deletion of vehicle fault and storage medium |
| CN110825072B (en) * | 2019-11-29 | 2020-08-28 | 安徽江淮汽车集团股份有限公司 | Automobile fault diagnosis method, equipment, storage medium and device |
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| CN113485286A (en) * | 2021-06-22 | 2021-10-08 | 东风汽车集团股份有限公司 | Remote monitoring terminal fault prompting method and remote monitoring terminal |
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