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When we use a car daily, encounter lamp of a certain breakdown shines, appear suddenly perhaps certain breakdown, shake for instance, abnormal knocking, with respect to can extraordinary tension, send rapidly repair a factory to check maintenance. Arrived to repair a factory, repairman can receive detector of a computer to the car, check malfunction code, telling you next is which component appeared breakdown, need changes. So what meaning are these malfunction code after all? Where occurrence problem is why seeing it know?
What is malfunction code?
Various sensor distributinged inside present car, the car the working information of each place sends the control unit of the car at any time, after control unit is judged through the analysis, give out a series of the instruction gives carry out implement, let a car make all sorts of motions, cheer for instance, break oil, shift gear, apply the brake, change direction etc, help the driver's better control car;
If did not receive information or the information that receive a mistake, control unit is met this information memory rises, this is malfunction code; Report a driver with certain kind next, illume for instance breakdown lamp or give out alarm sound to wait.
The generation of malfunction code has two kinds of reasons:
1.The signal that sensor transmits is wrong, this kind of circumstance is sensor oneself breakdown or circuit breakdown commonly;
2.Control logical error, control the information that unit receives to conflict each other namely, cannot carry out, also can store at this moment malfunction code, but the breakdown position that indicates at this moment is not accurate certainly, need us to undertake analytic judging logically according to the control of relevant component.
So, through unscrambling breakdown code, can identify the account that breakdown may produce and position correctly mostly, but also can appear judgement error, cause misdirect. Actually breakdown code is only one is or those who deny limit conclusion, point out the specific reason of breakdown impossibly, want accurate decide breakdown place, still require a basis the breakdown of engine is symptomatic, ability of further analysis and examination is accomplished.
How does malfunction code look?
"Malfunction code the first character "
Malfunction code included 5 character, the first is a letter, 4 behind are a number.
"Malfunction code the 2nd character "
1.× of × of × of malfunction code P0
In malfunction code, with " 0 " of begin " P " for code code of ISO standard pilot (for example P0099) , all car manufacturer is identical, by ISO/ASE predefine.
Code of ① P0100 set and fuel and air are metric about.
Code of ② P0200 set is as metric as fuel and air also about.
Code of ③ P0300 set and ignition system are concerned with the condition that lack fire.
Code of ④ P0400 set and auxiliary discharge control system to concern.
Fast control system and auxiliary input concern code of ⑤ P0500 set and speed, idle.
Code of ⑥ P0600 set and the special circuit that control unit and in-house breakdown or dominate unit and other control module in the join inside multichannel communication system are concerned.
Code of ⑦ P0700 set and gear-box control function are concerned.
Code of ⑧ P0800 set also controls a function to concern with gear-box.
Of ⑨ code two digit word points to the specific subsystem that has respective diagnostic program finally. For example, p0115 refers in particular to sensor of temperature of engine cooling fluid.
Of a few P0200 of ⑩ and P0300 set code two digit word is used at identifying to detect finally the specific engine air cylinder of breakdown. For example, p0300 states many air cylinder lack fire, p0301 states 1 crock lacks fire, p0302 states 2 crocks are short of fire to wait.
2.× of × of × of malfunction code P1
In malfunction code, with " 1 " of begin " P " for code code of car manufacturer pilot (for example P11 × × , fuel of car manufacturer control and empty throughput) , it is good by car manufacturer predefine, also be manufacturer is peculiar likely, but also belong to standard code.
3.× of × of × of malfunction code P2
× of × of × of malfunction code P2 also belongs to standard breakdown code, it is standardization code (SAE/ISO) the area that cent gives, and specific manufacturer code. Some are obligate of ISO, SAE, some are the breakdown code that had issued.
4.× of × of × of malfunction code P3
× of × of × of malfunction code P3 also belongs to standard breakdown code. Some are obligate of ISO, SAE, some are the breakdown code that had issued. × of × of P30 × × , P31 × , P32 × states fuel and air are metric, and auxiliary discharge control equipment; P33 × × indicates ignition system be on fire; The standard code that × of × of × of × of P35 × × , P36 × , P37 × , P38 × , P39 × is ISO/SAE obligate.
"Malfunction code the 3rd character "
× of malfunction code P0 00 in the system that the 3rd character affirms to malfunction code happens or subsystem.
"Malfunction code the 4th with 5 character "
Two character after malfunction code is medium express to spark the condition of malfunction code, represented actual part or specific breakdown name specificly. Malfunction code number is from 00 ～ 99, different sensor, carry out implement the digital number that allocated different section with circuit. These numbers provided more material information, the depress that be like report or tall, answer slow, signal to exceed limits to wait.
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