Car steering wheel jitter causes and solutions

Car steering wheel jitter, is our daily driving in the process of one of the most common vehicles problem, especially the vehicles driving to 50000 km to 70000 km between the most easy to appear this kind of phenomenon. Steering wheel jitter, body resonance will lead to not safe driving, need to use Auto Diagnostic Tool in time to check the performance of the car.

Cars driving speed at between 80-90 km, will appear steering wheel jitter, more than 90 kilometers per hour is back to normal. This happens mostly caused by the tire deformation or vehicle transmission system, must use the Launch X431 GDS or Launch X-431 PADII tools to check whether the front wheel orientation Angle and the toe-in meets the requirements, such as loss of quasi should be adjusted; Set up front axle try to turn the wheel, wheel static balance condition and examine whether the tire deformation is too large, such as deformation should be replaced.

Traveling on a flat road vehicle normal, but encountered potholes, steering wheel jitter. This is due to the car in the driving, because of the pull rod ball head wear loose or glue joint fall off, as there is a tire wear and tear become irregular, should be sent to the professional repair point inspection, replacement of damaged parts.

Vehicle at 30-40 km per hour, the body has shake feeling, like the feeling of by boat. This happens mostly because the tires when used in daily due to causes such as brush, bump or aging and other reasons caused by the deformation caused, by the replacement of tires.

At high speeds the steering wheel appeared jitter when suddenly hit the brakes. Brake too hard, often may cause brake disc, brake pads, overheating, encounter cold deformation, caused by steering wheel vibration. Usually in the replacement of brake pads, brake pads, symptoms can be resolved, in order to drive the vehicle safety, should be regularly used Xtool PS2 or Autel MaxiSys Pro MS908P tools to check the performance of the car.
Source: http://www.focalobd.com/blog/car-steering-wheel-jitter-causes-and-solutions/

Car battery daily maintenance Considerations

The length of service life of the vehicle battery, on the one hand, depends on the structure and quality of the battery, on the other hand, it is closely related with the daily use of OBD Diagnostic Tool maintenance, so we should do the following:

1, note that securely installed and cleaning maintenance
First, the battery in the car on the installation to be firm and reliable, to prevent the vibration caused by the car in the driving caused by the loss of the internal electrode of the battery and the connection of the external wires. Second automobile starting batteries can bear a large current discharge time is short, but small current for a long time discharge will lead to reduce the battery life; so should often remove the dust on the battery, and posts and threads on the oxide and the liquid outlet overflow electrolyte, keep clean and dry, to prevent the battery self discharge.

2, pay attention to timely charge
When the battery voltage is insufficient and the light is dim, the starting weakness, should carry on the vehicle outside the supplementary charge promptly. Battery charge capacity can be reflected on the dashboard, you can also use the Launch X431 PAD or Launch X431 GDS tool to detect. When the ammeter pointer display when about a third, it should be promptly charged, charge more than two-thirds of the over-discharge. Overdischarge the charging current is comparatively large, is not conducive to reducing active substance. Cars traveling in cold regions, to avoid the battery is fully discharged, in order to avoid the electrolyte freezing.

3, regular inspection
a, check the battery housing for cracks and electrolyte leakage.

b, always check the battery cable is solid, all joint, must maintain good contact, prevent sparks, causing the battery to explode. For example, always check the battery in the holder fixing bolt tightening, often view the pole and wiring connector too is reliable; Do not insert metal objects on the battery to prevent short circuits; sealed plastic cracks to timely repair. Check the circuit of each part of the aging or short circuit.

c, regularly check the battery electrolyte density and liquid height, check the battery discharge level, to prevent over-discharge and early retirement.

d, to keep the battery charging circuit is normal, when the battery charge indicator does not necessarily excessive use of the correct display charging properly or not, you can use the following method: In the evening let the car idle state to keep open the car headlights, illuminated to a certain fixed position, eyes fixed on the center of the light closer look, then refuel anxious to see if the lights suddenly brighten, lighten describing a generator and charging circuit were normal, also can be directly used Autel MaxiSys Pro MS908P or XTOOL PS90 GDS tools to detect the battery state.
Source: http://www.focalobd.com/blog/car-battery-daily-maintenance-considerations/

Summer high temperatures using car easy cause four big hidden trouble

Car paint accelerated aging
Solution method: Avoid direct sunlight washing the car, the car paint surface water droplets will produce convex lens principle, would lead to further aging car paint. Try to avoid parked in the parking lot of exposure, try to use car clothing and other materials to resist ultraviolet damage the car paint, try to paint the car waxing, sealing glaze, coating maintenance scheme, use Auto Diagnostic Tool testing cars, extend the life of the paint.

Heat easily puncture occurred
Many car owners should know that the tire pressure is too low actually tire burst a factor, but we know that the summer heat also lead to a cause of tire burst.

Solution method: Tire pressure is too high and too low are not safe, maintain normal manufacturer with tire pressure is beneficial to train operation safety. Standard tire pressure generally posted on the edge of the driver's door or the back of the cap.

Door seals easy to aging
Solution method: Sealing ring every other two quarters for a clean, dry with a clean damp sponge to wipe the dust on the slide rail, trench, reoccupy dry sponge mop wipe once more, to maintain the cleanness of seal ring. Can use the maintenance products such as table board wax on the depth of the door seal for maintenance, to prevent cracking. Can be used to Launch X431 PAD or Launch X431 GDS tools to measure performance.

Interior easy to aging
Solution method: One is the paste solar film. Good solar film in addition to cut off most of the ultraviolet ray, can also play a heat insulation effect; The second is when parking for car mount the sun block, this is to protect the automobile instrument desk, a good way to the front seat.

Other Considerations
Due to summer heat and sun exposure, high temperature inside the car, the owner don't put lighters, batteries, carbonated drinks in the car, prevent because of heat explosion caused by such accidents. Regularly use Autel MaxiSys Pro MS908P or Autel MaxiScan JP701 tools to detect cars. Hot summer weather, the driver pay attention to reasonable rest, after all, high temperature and muggy weather for driver is also a test, drive safely to keep in mind.
Source: http://www.focalobd.com/blog/summer-high-temperatures-using-car-easy-cause-four-big-hidden-trouble/

The cause of the lubricating oil consumption too fast

Just fill the oil to the car, not a few days to check the dipstick and found that missed a lot of oil, in normal use appear this kind of problem is not normal phenomenon, called abnormal oil consumption, what are the reasons and how to deal with it? Need to use the Auto Diagnostic Tool?

The reason: the consumption of lubricating oil is divided into two kinds of normal consumption and non normal consumption. Normal consumption is because between the piston and cylinder wall as long as the movement will gap exists, regardless of gap size, there will always be a part of the oil with the up and down movement of the piston is brought into the combustion chamber with the mixture together burn. This normal consumption, the general consumption should be less than fuel consumption 1% or less. You can use the Launch X431 GDS or Launch X431 V Pro tool to check it out.

Non-normal consumption is usually because there is a fault caused by the engine itself. There are three general reasons:

First, the cylinder wall wear gap is too big, lubricating oil through the clearance between the piston and cylinder wall to burn a lot into the combustion chamber. When the tube was evident with blue smoke from the exhaust phenomenon.

Second, the oil pan and oil seals Mifengbuyan, causing oil leakage.

Third, the engine cooling bad, the engine overheated, so a lot of oil and gas generated by the crankcase ventilation tube into the inlet and the mixed gas is burned together.

Thus, if you find that the oil consumption is too fast, the engine of a system failure. To use the Autel MaxiSys MS908 or Autel MaxiDiag Pro MD801 tool to find out the reasons for repair. Of course, if you use some of the inferior oil will also appear to oil consumption too fast. So be sure to use the regular factory production of lubricating oil. In order to avoid the damage caused by engine.
Source: http://www.focalobd.com/blog/the-cause-of-the-lubricating-oil-consumption-too-fast/

BMW X1 coolant temperature warning light alarm

A driving range of about 40000 km, models E84, engine type of N46 2013 BMW X1 sport-utility vehicle, there are a lot of friends reflect the car speeding coolant temperature warning light alarm, need to use Auto Diagnostic Tool detection.

Maintenance personnel to check the expansion tank in the cooling fluid is missing, there have cooling liquid leakage traces, doubt cooling system has a leak, the system for pressurized testing, good sealing.

Detecting an engine control unit, found no fault record on coolant temperature. Use the Launch X431 GDS or Launch X431 V Pro tool control cooling fan operation, to determine the fan work normal. N46 type engine water pump is a mechanical driver, as long as the engine running it will work. So will check of the opening of the emphasis on thermostat, cooling system, circulation and cooling system on the gas resistance.

In view of the vehicle mileage is not much, so doubt any wind resistance in the cooling system, cooling fluid according to standard process of adding and steam. And adjust the liquid level to the standard position. Road test, the test member come back soon, reflect the coolant temperature is high, and connect the thermostat pipe is cold. Read the circuit diagram, see the thermostat controlled by the engine control unit. In fault diagnosis instrument to observe the thermostat signal waveform, compared with the normal car found waveform, show that no control problems. Doubt thermostat has a problem, replace the thermostat test, fault is still.

After just tried to touch his hand car radiator, we found the upper and lower temperature difference, indicating that the coolant is not flowing from the interior, replace the radiator test, fault still exists. Promote the flow of the coolant pump, use Autel MaxiSys MS908 or Autel MaxiScan JP701 tool to check the pump, the pump impeller was found not rotated. Remove the water pump turned by hand, found stuck, replace the water pump test, troubleshooting.
Source: http://www.focalobd.com/blog/bmw-x1-coolant-temperature-warning-light-alarm/

Honda Accord ABS Light abnormal breakdown maintenance

There are a lot of friends in the Honda Accord sedan, the engine is F23A1 type, equipped with variable valve timing system (VTEC), after traveling 31,000 kilometers, ABS lamp lights up abnormal, need to use OBD Diagnostic Tool.

Honda Accord sedan ABS system consists of a solenoid valve safety relays, pump relay, wheel speed sensors, hydraulic pressure regulator (pump solenoid valve and a sliding piston assembly), accumulator, pressure switches, ABS lights and ABS computer components.

The car is equipped with self-diagnostic system, remove the right side of the glove box, to find self-diagnosis seat blue 2-hole outlet, using the Launch X431 GDS or Launch X431 V+ Pro3 tool to check. The ignition switch is pulled to the ON position, ABS lights flashing fault code is 10, indicating that non-stop operation of the electric pump the brake fluid. But boot up ABS lights, the pump does not turn. According to the principle and circuit diagram analysis ABS system, the cause of this fault code may be caused by insufficient pressure or pressure switch can not be closed.

Checked for leaks, ABS tank is not short of oil. So to find the pressure switch wire (yellow) to the computer at the office and the hydraulic actuator Ground Test. Ignition lock ON state, ABS lights, start the engine, ABS lamp. ABS pump operation, after the 10s ABS lights, pump stopped. Then the yellow line Ground, ABS lamp goes out, after re-grounding 5s, ABS pump stops, so repeat 1min, ABS lights were never bright. Measured with a multimeter pressure switch grounding line is normal, open the hydraulic actuator on the pressure switch cover, using a flat-blade screwdriver move microswitch direct pressure, measured with a multimeter two terminals blocked, replace micro switch on the same type of ABS, loading retest car, ABS light is off, everything is normal.

Because of the pressure switch on the micro switch is damaged, start the engine, ABS pump operation, produce high pressure brake fluid to the accumulator, solenoid valve, pressure switch, even boost, but at this time the pressure switch can not be closed, Autel MaxiDas DS708 or Autel MaxiDiag Pro MD801 tool detected ABS pump work for a certain period of time, the hydraulic pressure is still not up to the pressure, can not use the ABS system and shut down the ABS pump, ABS lights lit. Replace the same model ABS micro switch, ABS lights go out, everything is normal.
Source: http://www.focalobd.com/blog/honda-accord-abs-light-abnormal-breakdown-maintenance/

Car wiper and battery maintenance guide

How to identify under what circumstances need to replace the wiper?
1. From the wiper itself, the symptoms of damage. Identify whether there are cracks, cracks, rust, deformation, adhesion, color and so on; with ears to distinguish wiper when use whether jumping, such as jitter abnormal sound; the use of OBD Diagnostic Tool to check whether the hardening of the rubber, etc..

2. In the process of using see symptoms from the windshield. , look to whether have a slender stripe, is hard to see the outside world, this is because there is foreign body on the wiper or edge frayed, processing method first cleaning the edge part, if you do not eliminate symptoms will need to be replaced.

3. After the rain wiper is wiped, leaving a trail of water,  this is because the deformation of the rubber. If the rubber is not in contact with the glass surface, this suggests that the bracket deformation, wiper need replacing.

4. Check the wiper blade. The wiper pull up, finger touch on the cleaned rubber wiper blade, check whether there is damage, but also check whether the rubber blade has good elasticity, if the leaf aging, hardening crack, it should be replaced with new ones.

Check the battery electrolyte level should pay attention to what areas?
Check the electrolyte level, parked his car in a horizontal road, engine, by observing the battery shell on the scale line. Position, if it is difficult to determine the liquid surface of a battery, and with the aid of a lighting to see, can also use the Launch X431 GDS or Launch X431 V Pro tools to check the electrolyte level.

New battery is provided with an indicator, can through the indicator to check the status of the battery. Indicator on the green dots obviously show that the battery in good condition: a green dot blur, shows that lack of electricity: dots become transparent or yellow, indicate the need to replace the battery.

Its different battery indicator is displayed may be different. through Autel MaxiSys Mini MS905 or Autel MaxiScan JP701 tools real time data display, if the battery indicator is blue when normal, insufficient amount of electrolyte is red, when white needs recharging. There's battery level indicator at the square hole below the liquid level is too low, when the indicator of the level below the square hole for liquid level is too low, as it happens and square hole level as the standard, more than at the bottom of the square hole and filled with liquid mouth when too much for the amount of electrolyte.
Source: http://www.focalobd.com/blog/car-wiper-and-battery-maintenance-guide/

Audi A8 airbag use guide

Audi A8 car airbags as a standard configuration. For this system fault repair, need to master the structure of the system, working principle, and the Auto Diagnostic Tool correct test method. Here combined with the specific failure systematically to introduce.

1, Audi A8 airbag system structure and function
Audi A8 uses a multi point electronic sensor type airbag system, mainly composed of the following parts: control unit, side impact sensor, airbag, contact unit and safety belt tensioning device, etc.

Control unit, which includes 1 electronic acceleration receivers (i.e., frontal impact sensor), microprocessor, 1 mechanical acceleration receivers (for insurance), diagnostic systems (with memory), 1 accumulator and 1 crash recorder. The main function of the control unit is to receive the signal of the collision sensor, safety belt switch, monitor the status of the implementation of the system, the final issued instructions to the detonation of the airbag, the engine stopped working, connected to the alarm switch and lights up the fault lamp, and has self check, system monitoring and storage of fault information, crash records and other functions.

2, testing methods and precautions during maintenance
Audi A8 sedans airbag system has self-check function; Every time in the car when the system will detect the introspection; Once the system has a fault is detected, the instrument of red AIR BAG light will be bright. If the indicator light does not shine on when the ignition switch is turned on, or when the light is on, the system is in trouble, the system is in trouble. Fault diagnosis of the system can only be diagnosed by V.A.G1551, A. G1552 V., AS5051 V or other Launch X431 PAD or Launch X431 GDS diagnostic apparatus.

In addition, the system and the Audi car other electronic control systems, by using a dedicated Autel MaxiDas DS708 or Autel Maxidiag Elite MD702 diagnostic instrument that can be queried, troubleshooting part number and system software version of its system, the implementation of the final element, clear DTCs, read data blocks and coding and other functions to the control unit, the system's address code is 15.

No matter what kind of car airbag, it is only as a safety device, and can not put it as an absolute guarantee of adult life. So, in daily driving, we must pay more attention to the safety of driving, be sure to use the safety belt device.
Source: http://www.focalobd.com/blog/audi-a8-airbag-use-guide/

What are the functions of the automobile skylight

In the morning to open a automobile skylight: release of harmful gases
Car after a period of time of airtight, after Auto Diagnostic Tool detection, air filled with more benzene, formaldehyde and other harmful chemicals. The first thing in the morning on the car, that is, open the sunroof, the use of negative pressure ventilation principle, rapidly clearing the car of harmful gases.

Open sunroof traffic jam: prevent exhaust into the car
When traffic jams, all vehicles are at a standstill, automobile exhaust will inevitably spread in the surrounding air. Then open the sunroof, and close the side, the car's gas will soon be discharged, and then the outside air into the car through the air conditioning filter out large amounts of harmful substances.

After exposure to open sunroof: to quickly lower the temperature inside the vehicle
In the hot summer, the car after sun exposure, the interior temperature becomes higher than the outside, then into the car will be very uncomfortable. After Launch X431 PAD or Launch X431 GDS tool test data show, in order to quickly lower the temperature inside the vehicle, an effective method is to open air-conditioning at the same time open the sunroof, in the heat discharge and air conditioning refrigeration effect after began to emerge, the skylight close again.

High-speed driving to open sunroof: reduce wind noise
When you open the side windows high-speed driving, the owner often be annoying noise and he could feel the strong winds plagued also affect driving safety. If you then open the sunroof, close the side, which can effectively prevent this from happening.

Cold Weather open sunroof: Quickly eliminate car mist
Use skylights defogging defogging is a quick way. Especially in the summer and fall, rain, humidity. Alice ventilation position only need to open the sun roof to the rear, the front windshield can easily eliminate fog, ensure traffic safety, when necessary, require the use of Xtool PS2 or AUTOBOSS V30 Elite tools to detect car performance.
Source: http://www.focalobd.com/blog/what-are-the-functions-of-the-automobile-skylight/

Car over speed humps Tips

Cars over some speed humps, the normal speed through the speed humps, through OBD Diagnostic Tool detection show that it will damage to the vehicle, and ride comfort have influence, encountered deceleration zone how to through?

The effect of speed humps just as its name implies is to make the vehicle to slow down, even if the vehicle is not loose throttle or brakes, the vehicle up and down motion of the reason will be because certain rate weakened. Of course, the main role of the deceleration zone or let the driver subconsciously reduce vehicle speed by this section, the initiative allows the driver to pay attention to the road conditions ahead, generally in front of the school may be crossing or continue downhill.

1. Before experiencing the deceleration zone, the first driver's consciousness is closing the throttle and tap the brakes, and pay attention to road conditions ahead, and through the rear of the rearview mirror to observe road traffic conditions, if trailing behind the vehicles more, close the throttle to reduce speed must not to slam on the brakes. It is easy to cause behind the vehicle rear end collision, you can use Launch X431 GDS or Launch X431 IV GX4 Master tool detection of brake system.

2. For automatic transmission vehicles, as well as from the deceleration zone after a short distance, according to the vehicle damping performance and road driving conditions, the vehicle speed control at 30Km / h or less, but not too low. Although the lower rate turbulence weaker sense, but it will affect the overall rate of road traffic. Vehicle speed control to a certain speed, the rear wheels begin to spin down when the band can throttle speed.

3. For manual transmission car with a manual transmission car is relatively complicated. Before entering the deceleration zone when some began to collect the oil from the deceleration and observed the traffic situation around the vehicle, and based on the vehicle speed sequential shift into low, generally 1, 2 block can be relatively stable through the deceleration zone.

In the vehicle rate below 30Km/h or lower through the deceleration zone, according to the Autel MaxiSys MS908 or Autel Maxidiag Elite MD701 detection. To a file through the deceleration zone, light step on the clutch to do linkage and throttle idle speed, the rear wheel through deceleration zone, observe the road in front, slowly lift the clutch and lightly on the accelerator, according to the speed or engine speed a step on the clutch shift into high gear. At last, the car speeds of up to normal driving state.
Source: http://www.focalobd.com/blog/car-over-speed-humps-tips/

Auto cooling system maintenance tips

The most common fault of the automotive cooling system is making the car broken down, and the loss of water., With the loss of water as well as accelerating weakness fault. Checking the vehicles with the boil water tank, first you should to use the OBD Diagnostic tools to detect other related components properly, such as using the correct grade of fuel, oil, spark plugs, antifreeze and adjust ignition timing and idle air-fuel ratio. And further check the cooling system under the normal circumstances.

Daily checking for the cooling system
First look at the water tank. Under normal circumstances, the tank will keep a consistent temperature when driving, if half cold or hot situation appears, you can determine the tank internal was blocked. You can connect the tank to the two kilograms of water pressure, reverse flush, if congested, you can use small amount of cleaning agent, taking care to clean the dirt tank and observe for leaks at the same time.

Second, look at the thermostat. Some people think that the removal of the thermostat can prevent the water temperature up to high, in fact, as long as the thermostat function properly and does not cause the water temperature too high, while the engine is running at low temperatures for a long time, it will be very harmful. In addition, many additional engine thermostat is a two-way action, when the thermostat is turned off, it will force to go small circulation of cooling water, while the thermostat is turned on, small loop will be closed, the cooling water will take the big loop at a whole. If you do not install the thermostat, because of the local resistance line throttling effect, the actual flow of a cycle is with very little water, but the water temperature rises.

Finally, using the Launch X431 GDS OR Launch X431 V Pro tool to check the pump. There are three ways for the damage of the pump: leakage, turn and throw impeller corrosion. The so-called revolution is lost pump shaft and impeller with too large gap, when the engine reaches a certain speed, the pump impeller can not reach the appropriate speed, resulting in poor water circulation. Cooling fan is the main component, and some cars have been eliminated fixed fan, and replaced with silicone oil electromagnetic and fan clutch. The characteristic is it basically does not work by a cold car fan, and the maximum amount of heat hot car; silicone fan clutch main fault is that oil spills, and the main fault of electromagnetic fan clutch is damaged water temperature switch, damaged line, and the damaged electromagnetic coil.

Cooling System Maintenance
1. Use the Autel MaxiSys Pro MS908P or Autel MaxiDas DS708 tool check the cooling system seal, tightness of the fan belt, thermostat sensitivity and cooling water temperature, and keep plenty of cooling water.

2. Cleaning the cooling system, including the heat sink, the water jacket adhesion of scale, in order to prevent fouling in the cooling system thermal performance.
Source: http://www.focalobd.com/blog/auto-cooling-system-maintenance-tips/

How to effectively prevent the car paint to be oxidized

All the parts on the car can buy the original factory, only the paint does not have replaceability. According to experts, due to oxidation, the new car will gradually darken paint, it will result in serious paint cracking or even fall off. Through OBD Diagnostic Tool testing showed that: absolute coating products can be a long time to maintain the original color, completely blocked pollutants.

Paint can not avoid the threat of oxidation and weathering, the impact of car paint oxidation once caused it is difficult to easily remove. Polishing, polishing method for removing the oxide layer, the paint will cause a lot of wear and tear. Therefore, conservation of new cars from the start, the regular use of Launch X431 GDS or Launch X431 CResetter II tools to detect. To prevent paint oxidation, weathering, it must be isolated from the outside environment --- paint to prevent oxidation, barrier evaporate. Absolutely coating products are the most effective means to protect the paint against erosion, can long maintain the original paint color. Coating absolute advantage is reflected in the following four points:

First, Absolute coating can be performed at the same time in the beauty of the function of protection, completely blocked against the asphalt, acid rain, gum, pollen and other pollutants, prevent paint oxidation.

Secondly, the absolute coating can paint the mirror effect, delicate texture, bright shine on people.

Third, the paint coating products absolutely no secondary damage, curing just do surface protection film purification treatment, no secondary damage to the paintwork.

Finally, Absolute coating of the warranty period of 2 years or more.
Source: http://www.focalobd.com/blog/how-to-effectively-prevent-the-car-paint-to-be-oxidized/

How to correctly use car air conditioning

The correct use and maintenance will maximize the performance of air conditioning and extend the service life, and the error use will greatly damage the air conditioning systems, to make life greatly reduced. Automobile Air Conditioning life depends largely on whether the user is able to correctly use and maintenance. You can use the Auto Diagnostic Tool to check car air conditioning performance, air conditioning installed on the car must be carefully read the use of instructions, in accordance with the above instructions.

1, In order to avoid the excessive load of the engine starting, while the air conditioning compressor can quickly into the best working conditions, the first not to rush to the open air. Should put doors, windows open, you can use a fan for ventilation, etc. twenty or three minutes later to sit in the hot gas discharge start the car, and do not rush to close the windows, turn on air-conditioning outside the circle, when the inside and outside the temperature is close, and then close the window, enabling the internal cycle.

2. Select the appropriate air temperature, air conditioning maintenance is the first step. Because of the hot weather, many owners prefer to adjust the temperature too low, which will affect their health. Under normal circumstances, the compartment temperature difference with the outside temperature should be 5 ℃ to 6 ℃, the optimum temperature of air conditioning is 18 ℃ to 25 ℃.

3, Refrigeration and air conditioning wind best blowing up, because the cold air to the sink, the direction of the wind tests are best choice blow face gear, adjust the outlet up effect is best, don't choose the windshield of the block, because the temperature of the windshield is very high, would offset a large refrigeration effect. When selecting wind speed gears don't always use top gear, big air volume refrigeration effect is not good. If only the front occupants to choose 2 or 3 block wind speed is enough.

4, suggested that the owners to best in preparation for parking in front of the 6-7 minutes will close the air, let the remaining heat from the evaporation tank water drying, eliminate and outside temperature, so that you can easily keep air conditioning system relatively dry, can reduce air conditioning odor. Moreover, in front of the parking lot to close the air conditioning, will avoid the impact of the battery and air conditioning, to prevent damage to the engine.

Automotive air conditioning system in use process, the air will flow in the blower, refrigerating system evaporation tank, heating system of the small water tank and the air duct. As long as the air conditioning system blower or the air intake mode choice in the indoor cycle, regardless of whether the use of refrigeration devices, air will enter the system. Through Launch X-431 PAD or Launch X431 GDS tool to check show that the above device surface accumulation with a lot of dust, moisture, bacteria and other dirt, and will cause damage and allergic reactions to human respiratory system and skin, directly affect the occupant's health, and air-conditioning system itself will appear refrigeration effect is bad and a small amount of wind and other fault.

Under normal circumstances every 5,000 km or 3 months to conduct a clean air filter, every 20,000 km or 12 months use Xtool PS2 or Autoboss V30 SPX tool to check the air conditioning, and replace the air filter. This will ensure that you can enjoy the fresh clean car interior environment to ensure your health.
Source: http://www.focalobd.com/blog/how-to-correctly-use-car-air-conditioning/

Regular maintenance and check car handbrake

In the big city in the congestion of the car, the vehicle before and after the gap is basically less than one meter, and the slope of the overpass is very large, parking brake is particularly important. However, due to various reasons, the handbrake will appear when no use. In the daily inspection and maintenance of the vehicle, don't forget to use Auto Diagnostic Tool to check the performance of regular handbrake.

First, determine the operating position of the handbrake lever. Generally, when the handle is pulled three-quarters of the entire trip, the hand brake system should be in a normal brake position. Should first find out the work point, the general 5~7 case is normal position. Then check the brake mechanism efficiency, also is have a look handbrake to work effectively. The car drove up to the steep, good road conditions of the slope, step on the brake pedal, the neutral gear, pull the hand brake handle to just to determine the position of. Slowly loosen the brake pedal, if the car did not happen sliding, that means the hand brake performance is good.

Check the handbrake sensitivity, since it is very important to the slope. On flat roads slow driving, slowly pulling handbrake handle and feel the sensitivity and the junction of the handle. If it is found that the brake braking efficiency or sensitivity is not ideal, can regulate the handbrake thread through Launch X431 PAD or Launch X431 GDS tools to solve.

Adjust the hand brake wire. If found in the test the brake is not sensitive, can be solved by adjusting the handbrake arrows, below the hand brake handle with an adjustable compensation institution. Adjust the need to remove the handle decoration cover first, then use tools to adjust the length of stay, in order to ensure the hand brake is in the best working state.

Ordinary driving, the handbrake usage is very high, but the handbrake is not universal insurance, its performance will decline with the increase of using the number of times. Most of the time, because the system failure or improper use and don't effect, this is also the major hidden danger of the accident, so owners should regularly use the Autel Maxidiag Elite MD701 or Autel MaxiDiag Elite MD802 tools maintenance check handbrake.
Source: http://www.focalobd.com/blog/regular-maintenance-and-check-car-handbrake/

Nano fuel additives basic knowledge

Nano fuel additive is a functional material to make up for the defects of the fuel in some properties and to give some new properties of fuel. It has washing, dispersion, emulsion breaking, antioxidant, promoting burning, corrosion, rust, lubrication, cleaning function. According to Auto Diagnostic Tool tests show that nano-saving device is mounted on the pipe of the car, after the installation of this equipment can purify exhaust gas by 50% -90%, 10% -30% fuel savings, enhance the power of 10% -30%, reduce engine noise, suppression coke production, clean combustion and prolong engine life.

Maintenance and good driving habits is the key to saving, The best fuel-efficient way is at ordinary times to use the Launch X431 PAD or Launch X431 GDS tools check vehicle, to develop good driving habits. Do not always emergency braking or hard acceleration. Energy-saving cars "four bogey." A bogey, since often require hard acceleration, braking, fuel consumption ratio will increase 2-3 times uniform; two bogey, pay attention to traffic conditions ahead, without prior dodge or slow down in advance, the car will see the red light or experience, rely on the emergency brakes, natural fuel soared; three bogey, high speed and low-speed operation, the engine idle for a long time; four bogey for a long time over economic speed driving.

Nano fuel additives Product features: can effectively protect the engine, it can increase the useful life of an automobile engine and some 5 - 10 years, based on Autel MaxiSys Pro MS908P or Autel MaxiDas DS708 tool checks show can effectively fuel-efficient 5-16.6%, remove carbon deposition by more than 95%, the noise of the engine has also dropped. Nano fuel additive has a clean, dispersion, emulsion breaking and promote burning effect, after clear the carbon deposit in fuel oil, through the "microburst", promote burning, finally to reduce emissions, eliminate exhaust black smoke.
Source: http://www.focalobd.com/blog/nano-fuel-additives-basic-knowledge/

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/

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/

Oil filter working principle and type

Oil filter is one of the four filters, the other three filters were air filter, air conditioning filter and fuel filter, oil filter is filtering effect of oil impurities to protect the engine does not suffer wear, You can use OBD Diagnostic Tool to check whether the engine is wearing.

Oil filters filter principle can be divided into three categories: mechanical separation, centrifugation and magnetic attraction.

Mechanical separation according to its function and form can be divided into pure mechanical separation, aerial separation and adsorption separation, purely mechanical separation of common mesh filter, on the surface of the filter material has a certain size of holes, the oil of solid particles, the size is greater than the holes will be blocked on the filter material appearance, aerial separation is first attached to one or several small particles size is greater than their cavity the filter material on the inner wall of the cavity size smaller, then the particle because not pile up in the past, the formation of aerial phenomena, the filtering particle size smaller than the cavity size. Since the majority of particles in the oil is irregular, so overhead phenomenon is easy to form. And colloidal substances in the oil, use the Launch X431 GDS or Launch X431 V Pro tools inspection found that often adhesion on the surface or the inner wall of the cavity, the filter material is the adsorption separation.

The centrifugal separation is a rotor that causes the oil to rotate through a high speed, and the impurity in the oil is thrown to the inner wall of the rotor and thus separated from the oil.

Magnetic adsorption is the permanent magnet will be oil in the iron particle adsorption over. Don't let them in oil cycle back and forth, mechanical damage.

On filter classification, generally have the following methods:
1. According to the filter structure form classification: is there a wound rotor, scraping plate, etc.

2. By filtration fineness Classification: surface filtration and depth filtration.

3. After filtering way classification: surface filter and depth.

4. Arranged in the lubrication system by way of classification: a full-flow and bypass type.

Generally recommended 5000km replacement of oil filter, specific according to actual Autel MaxiSys Pro MS908P or Autel MaxiDas DS708 tool inspection data to decide.
Source: http://www.focalobd.com/blog/oil-filter-working-principle-and-type/

Anti-lock braking system ABS function introduction

Anti-lock braking system ABS can be installed on any car with hydraulic brakes. It is the use of the valve body of a rubber balloon, when put on the brakes, giving the brake oil pressure, flooded to the ABS valve, when the airbag use compartment in the middle of the air pressure to return, so to avoid wheel lock dead center. When the wheel is about to reach a dead lock, brake oil pressure the effects of repeated balloon, under the OBD Diagnostic Tool check, found in a matter of seconds can be 60 ~ 120 times, in does not stop brake, relax. ABS is composed of wheel speed sensor, engine speed sensor, solenoid valve, computer and hydraulic control unit (hydraulic regulator), and its characteristics are as follows four:

1, ABS with excellent performance and self diagnostic capabilities, you can rest assured that use. In addition, the use of ABS and the common brake system using almost the same, braking to foot on the brake plate normal braking can be, ABS will own the brake hold at the optimal point.

2, the car brakes, the braking force of the four wheels are different, if the car's front wheels to lock, the driver can not control the direction of travel of the car, prone to risk of a collision, if the first locking the rear wheels, can appear the skidding, tail flick, if installation of ABS, can avoid four wheel is locked, Launch X-431 PAD or Launch X431 GDS tool can detect ABS data, the ABS system improve the stability of the vehicle in the braking process;

3, compared with the conventional braking system, under the state of emergency braking, ABS can make the wheel in both rolling and drag, which greatly increases the tire and the ground friction and shorten the braking distance, namely the so-called optimal braking point or region, while the ordinary brake system is unable to do this;

4, It is proved that the wheel fully locked will cause tire cup type wear, make the uneven abrasion on the tire surface, thereby increasing the tire wear and tear.

Thus, ABS anti-lock system, can avoid the braking when the direction is out of control and wheel sideslip, make the wheel when the brakes are not locked, don't let the tire friction with the ground at one point, so as to increase the friction, in the Autel MaxiSys MS908 or Xtool PS2 tool checks found, ABS system makes the brake efficiency of 90% or more, while reducing brake consumption and extend brake drum, disc and double the life of the tire. Vehicles equipped with ABS in dry blacktop, rain, snow, skid resistance reached 80% - 90%, 30%, 10%, 15% - 20%.
Source: http://www.focalobd.com/blog/anti-lock-braking-system-abs-function-introduction/

Audi A6 car exhaust pipe black smoke

Audi A6 car engine operation of the exhaust pipe a small amount of black smoke emitted, exhaust gas is faulty. After testing, the engine power was normal. OBD Diagnostic Tool connector perform self-diagnosis, the engine system has a fault code, reads "00561, mixture adjustment exceeds the limit." Executive DTC Clear function, the fault code is cleared. Fault analysis, there may be poor oxygen sensor performance. View the data flow (functional path 01-08-007), the idle mode of the 007 data block 1 zone data (mixed gas formation control value) for -25%, 2 District data (oxygen sensor signal voltage) of 0 809V. Under normal circumstances, the mixture formation control value should be within the range of -10%, 10%, and the fluctuation of the mixture of the mixture is slightly fluctuation with the fuel injection quantity.. -25% data shows that the engine control module attempts to reduce fuel injection, in order to control the concentration of mixture in normal range. The signal voltage of the oxygen sensor is 0 809V, partial rich mixture, in conformity with the fault phenomena of the smoke.

By the principle of fuel injection, the engine control module mainly according to engine speed signal, air flow sensor signal to determine the basic fuel injection quantity, use the Launch X-431 PAD or Launch X431 GDS tool to check air flow sensor. Select the feature path 01-08-002, view the air flow sensor data (4 area data). The air flow at idle speed is about 7.5 kg/s, which is obviously larger than the normal 2 0kg/s -4... The 2 zone data is the theory injection time (crankshaft to a circle), the 3 zone data for the engine a working cycle of injection time (actual injection time). The actual injection time is on the basis of theory of injection time correction of, should be twice fuel injection time and the car of the two injection time almost the same it proves that the theory of injection time is too long, after correction of the actual injection time shorter. When the fuel injection time correction exceed the limit, the failure code will occur 00561. The result of the above detection is that the cause of the fault is the air flow sensor signal is too big 6 replacement air flow sensor, the fault completely ruled out.

Since the air flow sensor signal in the car idling just too high, and in the part-load conditions and acceleration conditions are normal, and therefore less impact on the overall condition of the engine, fuel consumption is not significantly increased. In addition, by Autel MaxiSys Pro MS908P or Xtool PS2 dynamic data analysis process it can be seen, although the engine control module based on the oxygen sensor signal identification to the mixture is too thick, but no corresponding reduction in the fuel injection quantity so that the concentration of the mixture back to normal, the reason is, fuel injection depending on the amount of engine intake air, engine speed, oxygen sensor signal is only a feedback signal as a mixed gas under closed-loop control mode, the fuel injection quantity correction within a certain range.
Source: http://www.focalobd.com/blog/audi-a6-car-exhaust-pipe-black-smoke/