Why the car circuit system will catch fire

Automobile circuit usually have starting circuit, power supply circuit, lighting and light signalling device circuit, ignition circuit, auxiliary circuit device, electronic control system circuit, instrument information system circuit composition. So many friends in the process of driving the car will be found auto electrical systems fire, when people are very anxious, do not know what is going on. So today we analyze why the car circuit system catch fire, of course, need professional OBD Diagnostic Tool to be checked.

Among the car ignition accident, car circuit fire occupy a large proportion of spontaneous event. This circuit is aging and the car circuit load is too high is the reason. First, since the engine work, the ignition coil high temperature, easy to make high-voltage ignition wire insulation softening, aging, crack damage, ignition high-voltage insulation breakdown easily produce high-voltage leakage, short circuit leading to spontaneous combustion ; second, the car has a growing number of electronic control technology, intelligent vehicle widely used, Launch X431 Diagun III or Launch X431 Creader VII+ tools to detect data show a substantial increase in the power consumption of automotive electronics accordingly. Auto electrical systems on limited load space, automotive microcomputer, electronic components, various sensors circuit systems are likely to cause damage, since a large number of cars increase the variety of additional electronic equipment, may also increase the burden on car circuit, causing spontaneous combustion fire.

Car circuit maintenance is very important, a lot of the cause of fire is circuit aging, many friends think now car maintenance is the car's appearance maintenance, do essential for the maintenance car circuit, you can also use Autel MaxiSys Mini MS905 or Autel MaxiSys MS908 tool regular inspection car circuit to ensure the safety car circuit.
Source: http://www.focalobd.com/blog/why-the-car-circuit-system-will-catch-fire/

How to maintain the car automatic transmission

Now city traffic condition is getting worse, car stop-go situation has become the habit of the driver. So, portable, easy these two features automatic car has quietly become the first choice for most people. Although automatic car easy and convenient, but because of the automatic transmission system is very sophisticated, if the automatic transmission fails, we need to use a professional OBD Diagnostic Tool repair, and expensive, and therefore, the automatic transmission need to be more careful care and maintenance.

The automatic transmission oil can not only play the role of lubrication cooling, but the main thing is to transfer power between the engine and gearbox. Lubricating oil temperature is generally around 120 degrees Celsius, so demanding on the quality of the oil, and must be kept clean. First frequently used Launch X431 V Pro or Launch X431 IV GX4 Master tool to check the automatic gearbox oil level is normal. Check method of automatic transmission fluid and engine oil is not the same, need to be preheated to about 50 ℃, the gear lever again after a short stay in each block in the parking and the oil dipstick corresponding normal oil level should be between the highest and the lowest line, if not, should be added in time.

In most cases, when we replace the automatic transmission oil is to remove the screw automatic transmission oil pan to miss the old oil then add new oil, but this can only put about a small part of the new oil, and there Most of the old oil remains in the gearbox. If demolition sump oil change way, you can put 70 percent of the new oil, so as to ensure the transmission of health. Presently preferred method is dynamic oil change oil change, using a dedicated gearbox cleaning equipment, the full cycle of old oil, drained and then add new oil, so that the oil change rate of 90%.

As the vehicle traveling road is rather special, road congestion, poor air quality, is easy to cause transmission oil oxidative deterioration, according to Autel MaxiSys Pro MS908P or Autel MaxiDas DS708 tool inspection data indicate that the deterioration of the transmission oil increased wear of friction between the film and increase fuel consumption, if not to change new gearbox oil for a long time, will cause oil particles increases and block oil, blocking the plunger, and even a shift impact, so the transmission oil must be replaced periodically.
Source: http://www.focalobd.com/blog/how-to-maintain-the-car-automatic-transmission/

Citroen car air conditioning compressor frequent starts

Configuration 8V engine and manual transmission Citroen. As the hot weather, frequent use of air conditioning systems, and found that air conditioning cooling effect is getting worse, specifically the phenomenon as follows: Press the air conditioning and refrigeration switch (Electric No. 584), air conditioning compressor to operate properly at first, but with the extension of working hours, use Auto Diagnostic Tool testing data showed that the air conditioning compressor electromagnetic clutch is frequent absorption and separation, intermittent failure caused by air conditioning refrigeration function.

Air conditioning system circuit diagram, the air conditioning compressor electromagnetic clutch frequent closing and analyze the cause of the fault separation, according to the possibility of making maintenance plan, and then to repair work as follows:
1) Check the engine compartment fuse box (Electric No. 52) of the fuse F12, normal. In the case of opening and closing of the ignition switch, voltage with a multimeter block measuring the terminal voltage connector 113 BIIA results were obtained for the battery voltage and 0V, normal. In the case of opening and closing of the ignition switch, air conditioner switch assembly measuring terminal 7 NA1 voltage, battery voltage, respectively and 0V, normal.

2) Replace the air conditioning switch, the failure remains. Replace the air conditioning control box, the problem persists, that failure has nothing to do with these two parts.

3) In the case where the engine is not running and the operation of detecting the line pressure of the refrigerant, the refrigerant is obtained by the static pressure of 500kPa, the dynamic pressure of the refrigerant: a high pressure of 1300kPa, a low pressure of 140kPa. The above measurements were compared with standard values, in line with requirements. This ruled out due to the refrigerant pressure abnormalities lead to the air conditioning compressor electromagnetic clutch pull and separate frequent failure factor.

4) Check the coolant temperature control box (appliance No. 53) and the related wiring. External line there is no problem. Replacing the coolant temperature control box test, fault still exists. Continue to check the fuse box in the engine compartment fuse, no abnormality was found. Check the coolant temperature control box plug voltage terminal 15N4,15N15 in the ignition switch is turned on is the battery voltage, Launch X-431 PAD or Launch X431 GDS tool coolant temperature measurements show that the control box supply line is no problem, thus excluding the coolant temperature control box failure factor.

5) Check the coolant temperature sensor (electrical No. 910 for coolant temperature control box to provide coolant temperature signal) and the line, there is no obvious anomalies. Replace the sensor, the fault persists.

6) Check the evaporator temperature sensor (Electric No. 912) and the line of work, there is no appearance problem. Measure the resistance with a multimeter evaporator temperature sensor found resistance is too large. Replace the evaporator temperature sensor, test, fault completely disappeared, ending maintenance work.

The evaporator temperature sensor is a negative temperature coefficient thermistor, its resistance decreases with increasing temperature. When the resistance is too big a problem occurs evaporator temperature sensor, the signal voltage will become larger, air-conditioning control box will mistakenly believe that the evaporator temperature is less than 1 ℃. To prevent evaporator freeze, air conditioning control box off the air conditioning compressor electromagnetic clutch operating power. After a child, Autoboss V30 SPX or AUTOBOSS V30 Elite tool checks found that the evaporator temperature is higher than 3 ℃, began to turn on the air conditioning compressor electromagnetic clutch pull. Again and again, the results of the air conditioning compressor frequent start of the fault phenomenon. The evaporator temperature sensor is a vulnerable part, only after the damage can be replaced.
Source: http://www.focalobd.com/blog/citroen-car-air-conditioning-compressor-frequent-starts/

Air filter and car battery maintenance guide

Everybody for car batteries and air filter should be familiar with. So we usually listen to music while driving in the open air or blowing cold air, which must support the job by a car battery. And if the battery is no electricity or damage, the car is unable to start, so the need for regular use Auto Diagnostic Tool to check the vehicle battery. Then the air filter plays a filtered air entering the engine, to provide clean air for the engine, reducing engine running wear. Today we take a look at the two components of the maintenance guide.

Car battery:
General, automotive battery life is two years. Some owners usually well maintained, can extend this use time. If maintenance do not get bit, less than two years to be replaced. If the battery has been aging and not timely replaced, repeated charging and discharging can damage the internal battery plates and an electrolyte. through Launch X431 Diagun III or Launch X431 V+ Pro3 tool check data show that: the battery capacity will be reduced and eventually run out of power, the engine can not be started.

Air filter:
General car mileage of forty thousand kilometers or two years can be considered to replace the air filter. If it often in some dusty environment, the replacement cycle would go ahead of some. If no timely replacement of the air filter, increases mileage and filter clogging. And reducing engine power, accelerate the ability to reduce, reduce fuel economy, cylinder due to dirt and damage, air supply is insufficient.

So now we should all know the importance of car batteries and the air filter. Just remember that your battery and air filter coming two year when we should use Autel MaxiSys Pro MS908P or Autel MaxiDas DS708 tool to check usage, it should be replaced. Usually in the car maintenance cycle time, we must check the battery and air filter, if there is a serious aging, damaged the situation, it should be replaced.
Source: http://www.focalobd.com/blog/air-filter-and-car-battery-maintenance-guide/

How to maintenance of automatic transmission oil filter

Filter is the key projects when we maintenance to the car, oil filter, air filter, fuel filter, the so-called "three filter" Conservation has always been a point of attention. In addition to these three common commonly used filters, there is a transmission oil filter, its maintenance methods very few people know, is very simple, just use the OBD Diagnostic Tool can be.

The conservation process in the daily inspection car, the car transmission oil filter is rarely mentioned, unless damaged, affecting the transmission operation, otherwise, its maintenance is easy to be overlooked in. Because in most cases, transmission oil filter is not like oil, air or fuel filter as easy to replace. In fact, since the automatic transmission oil, ATF filter is a device for protecting the second main assemblies, so it should be kept clean or replaced in time according to the Launch X431 V Pro or Launch X431 IV GX4 Master equipment recommended by the manufacturer.

The automatic transmission usually paper filter, felted membrane filter or oil filter to filter out the dirt. Asian carmakers like using a membrane filter; and European and American manufacturers are more inclined to paper or felt filter.

Some car manufacturers have introduced long-life or maintenance-free transmission. The transmission no dipstick device and its normal maintenance, ATF and filter replacement cycle of up to 160,000 km / h.

For the ATF filter, you can't judge the performance of the filter, unlike oil filter to be replaced follow along as oil, unlike the air filter, you can take it down and clean it, transmission oil filter can only rely on inspection and maintenance process maintenance personnel inspection tips. It also reminds us that we must have understand of basic car maintenance knowledge, or you can use the Autel MaxiSys Pro MS908P or Autel MaxiSys MS908 professional equipment to check the filter work performance.
Source: http://www.focalobd.com/blog/how-to-maintenance-of-automatic-transmission-oil-filter/

How to Clean EFI engine gasoline injection system

EFI engine is currently using a wide range of devices on the car, compared with the conventional carbureted fuel system, EFI engine fuel supply system, not only complex, but also parts with precision. When cleaning maintenance to must pay special attention to, when necessary also need to use Auto Diagnostic Tool to check the engine oil supply system.

During cleaning maintenance, some parts can not be disassembled and dismantled, some parts assembly requirements is high, which makes fuel injection system than carbureted gasoline vehicles are more vulnerable to gasoline in the glial, sediment hazards, resulting in clean work is very complicated.

Engine fuel supply system, into the exhaust system is clean, has a decisive influence on car driving performance and even. Due to the influence of driving environment and fuel quality, the injection nozzle, intake manifold into the exhaust valve and combustion chamber and other prone resin sediment, through the Launch X431 PAD or Launch X431 GDS tool inspection data show, affecting the normal fuel supply, caused by fuel injection quantity control are not allowed, atomization adverse, oil pressure regulator failure, resulting in engine idle speed instability, poor acceleration, knock, lack of fire, increased fuel consumption, exhaust emissions exceeding etc. fault phenomenon occurs.

In order to clean the oil supply system need to solve the problem from the inside, they usually avoid demolition clean way. Vehicle cleaning job by Xtool PS2 or Autoboss V30 SPX special equipment and cleaning agents, under certain pressure and flow control, intake manifold, fuel injectors, intake and exhaust valves and thoroughly clean the combustion chamber, in order to restore normal operation of the fuel system to ensure good driving performance of the car.

Source: http://www.focalobd.com/blog/how-to-clean-efi-engine-gasoline-injection-system/

What causes a car to knock and car knock solutions

New buy the car engine appears knock phenomenon. I believe that there are some people who have a little in-depth understanding of the working principle of the automotive engine, should understand the engine appears knock whether quality problem. if you don't have any information about the engine of the car, then we look together, what is knocking? Why the engine will knock? What effect does the knock have on the engine? How to avoid the engine knock? Why use the OBD Diagnostic Tool to check the engine knock?

The so-called "knock" is not to say that engine would explode or violent shaking, but refers to the gasoline engine before the spark plug without ignition, sprayed into the cylinder fuel is because of the cylinder body and the high temperature and the occurrence of spontaneous combustion of a non normal phenomenon. The spontaneous combustion will not only cause engine cylinder in local temperature is too high, can not let fuel to participate in the work of the engine, resulting in power output in serious decline, resonance between the piston and cylinder wall, because of abnormal vibration caused by explosion is called "knock".

Engine knock is actually the most important reason is that gasoline grade is too low, we often say that the number 92, number 95 refers to the grade of gasoline, Gasoline label is neither refers to the purity, nor does it imply a lot of people often say that the so-called octane number, but gasoline anti-knock index, also known as anti-knock index.

Focus, Mazda 3 and other vehicles encountered the "knock", the manufacturers solution is to use Autoboss V30 SPX or AUTOBOSS V30 Elite tool for trip computer upgrade, the knock problem is solved.

Engine knock is not the most important step to upgrade software part, the modern automobile engine through hardware modifications also cannot let knock disappear, essentially the only solution is based on the actual demand of the engine, the correct selection grade of gasoline .

Recommend vehicle appear knocking, first switch to high-grade gasoline, suppress the occurrence of knocking fundamentally. Try to avoid prolonged idling stop, avoid high gear low speed driving, automatic models accelerate to overtake, use low gear when climbing or manual shift mode, can effectively reduce the production of coke, to suppress detonation engine protection is also very favorable. Timely use Autel Maxidiag Elite MD701 or Autel MaxiDiag EU702 tool to check the engine, regularly clean the throttle, using high-grade synthetic oil can also reduce the incidence of carbon, the same can effectively avoid the generation of knock.
Source: http://www.focalobd.com/blog/what-causes-a-car-to-knock-and-car-knock-solutions/