Solve The Automobile Fault With The Substitution And Set Of Instruments
The so-called substitution is a car mechanic in accordance with the vehicle user
that the possible failure of the part-qualified assembly and test replacement parts and components assembly may be damaged, a fault diagnosis process is simplified and effective method. Tools like launch x431,lexia3,mb star can be used.Is worth noting that the replacement of spare parts should be tested, reliable, or new parts must also be a qualified product, if inadvertently broken parts replaced bad parts, not only can not find fault, but fault location will false, increase the difficulty of diagnosis.Such as engine oil pressure indication system failure, when the suspected sensory plug is damaged, can be a good backup pressure sensor plug replacement of the original car, the pressure sensor plug, and then test, if the change before the piece is not good, for immediately after the solution the problem is obviously for the site malfunctioned, and immediately repaired. Spare parts can be repaired after the dismantling, and back up a new one. If put to the test when the good parts are still bad, then the fault may not be here, think of other ways to find.
For difficult faults, can replace the parts of many. Note the use of diagnostic methods as launch x431. For example, the lack of engine power failure, can replace a new air filter, and then re-test; for the oil system fault, if you suspect the oil pump pressure is low, you can replace a new fuel pumps. The brake system failure, the more difficult to identify the case, you can try to change a brake master cylinder (master cylinder), after the system re-adjusted the brake system failure on the excluded. For the power steering system failure, if it is turned heavy, you can try to change a power steering device, the system re-commissioning after the power steering system failure on the excluded. So the above example, you can explain failure to occur in office replacement parts. Put on the replacement parts for assembly, you can not remove here, so even eliminating the need for maintenance procedures are also the double benefit of something.
Some automotive mechanic hand there are some commonly used spare replacement parts, such as headlights, small lights, relays, fuses, etc., encountered some trouble, a change on the spirit, after all, a simple, effective and reliable method to judge the fault. Application for a reasonable replacement method, using the substitution must be careful and fault diagnosis should be pretty close. To avoid chaos for the blind and the increase in workload.
Diagnostic instrument is an indispensable tool for automotive failure, conditional use should be as much as possible. Do not overlook lexia3 use. Truck-mounted instruments and indicators can effectively direct the cars fault occurred. Scale instructions such as fuel oil fuel capacity, when the car will not fuel gauge instructions and zero, that car is not out of oil, rather than a failure occurs. Brake warning light illuminated, indicating the braking system is faulty, should be further look.
Auto voltmeter indicating the vehicle electrical system voltage, the road also can accurately determine the power generator and battery charge situation; when using an electrical switch when the voltage meter has to reflect, that can be used to judge electrical equipment works properly. Automobile non-contact tachometer, you can more accurately measure the real-time engine speed, driving instructed the engine speed, engine speed time to time direct gear changes, with the engine tachometer, engine can be some glitches from the tachometer reflected.
Maintenance, cylinder pressure gauge can measure the cylinder pressure and the pressure difference between the cylinder and the cylinder of the leak case, etc.; multimeter can easily determine vehicle electrical system failure, etc.; front locator can also be measured vehicle front wheel alignment ; sound level meter can measure vehicle and engine noise, etc.; smoke meters, the fifth-wheel, brake tester, automobile chassis dynamometer test bench, are all of them have to use the vehicle maintenance to the instrumentation and test equipment, necessary use the special equipment. Other needs have used mb star.Control instrumentation and electronic diagnostic equipment, knowledge is more difficult, to have basic knowledge, but also hard to study, to understand and diagnose car trouble on the difficult.
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