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/

How to effectively prevent the car rust oxidation

Tip 1: alert subtle small flaws
Car paint surface often corroded, in addition to the common collision, scratching, driving tires up small stones to play in the paint, make the emergence of dots of a peeling paint, a long time will produce a small rust. And these small scars because most of the small, easy to be ignored. Therefore, usually to regularly use the Auto Diagnostic Tool inspection car, bonnet and body around, once found to promptly to the professional beauty shop for processing.

Tip 2: ground investigation easy to water at humidity
Vehicles traveling on the way, passing through muddy puddles, and some gaps at the underbody and interior floors, etc. are easy to accumulate sludge, such as the owner does not promptly cleaned, which makes cars rust. Thus, for doors, trunk bottom corner of the door frame of the key hole and the wipers moving parts, etc., should always use the Launch X431 V+ Pro3 or Launch X431 IV GX4 Master tool to check, while maintaining the smooth flow of the doors and body departments drainage holes, check the car cover Humidity matter , such as carpets, floor parts to prevent rust.

Tip 3: the soft paint do seal glair
Some paint softer vehicle traveling at high speed during the sand particles hit the car body may also result in a fine relying marks. For this kind of cars, glaze to body, it can form a mesh of solid protective film, improve the surface hardness, the effect can be stay for about a year. And the coating can also achieve a similar effect. Also for the bottom of the vehicle can chassis armor or a plastic sealing, which can protect chassis acid rain, corrosion protection, the original protective layer is not easy to dry and fall off, can also prevent the driving small stones the impact of the chassis.

Tip 4: Toothpaste can be temporary anti-rust coating
To deal with ordinary toothpaste. When found a new small scars, and gently wipe the toothpaste applied circle scratches. Rain or after washing, apply it. This generally reduce scratch mark, you can simply play a role in isolation, to prevent rust, through Autel Maxidiag Elite MD701 or Autel Maxidiag Elite MD702 tools to detect no problem in the short time. Especially white paint, the effect is most obvious.
Source: http://www.focalobd.com/blog/how-to-effectively-prevent-the-car-rust-oxidation/

Automotive transmission belt regularly checked guide

The car drive belt is responsible for all parts of the movement, if it bad the car can not move. Because the engine is driven by a belt drive all kinds of auxiliary mechanism, such as an air conditioner compressor, power steering pump, alternator, etc., if the belt is broken, or there has been slippage, will be related to the loss of the auxiliary mechanism, or its performance decline, thereby affecting the normal use of the car. Therefore, it is necessary to check the drive belt regularly using Auto Diagnostic Tool.

Belt inspection method is very simple. First, check the belt tension, select the longest unsupported belt span intermediate applying moderate pressure with your thumb, if the reduction is about 10 mm in the belt, that the belt tension is just right. If the belt tension is too large, or too loose, it could result in slippery tooth, transmission is incomplete. And adjust the belt too tight, so that the belt is easy to tensile deformation, but also accelerate the pulley and bearing wear. For this reason, it should be related to the adjusting nut or bolt loosen the belt tension adjustment to the best, if you are not sure the best, you can use the Launch X431 V+ Pro3 or Launch X431 CResetter II tool check the belt the best condition.

In addition, in daily inspection should pay special attention to the wear of the belt. Because if the belt wear is serious, it will cause the belt and the belt pulley contact area to drop sharply. At this time, as long as a pressure belt, the belt is deep down to the groove of the belt pulley.

Also, if you find the belt surface cracks and spalling cracks appear phenomena such as sound or belt slipping occurs, indicating the belt may be broken and must be replaced immediately. If not promptly replaced, the belt once in a moving way break, the vehicle will not be normal driving.

In actual use, check and replace the automobile belts are very complex, generally professionals using the Autoboss V30 SPX or Autel Maxidiag Elite MD702 tool operation. Moreover, because the price of the belt is not particularly expensive, often change in time before the arrival of the service life of the belt is a common choice.
Source: http://www.focalobd.com/blog/automotive-transmission-belt-regularly-checked-guide/

Common method for cleaning automotive fuel injector

After vehicle driving for a long time, the fuel injector outlet is usually bonded with some carbon deposits, gum grease and other debris, will lead to fuel injection nozzle fuel reduction, affect vehicle acceleration performance, but also a serious engine can not be normal operation. Therefore, in daily vehicle maintenance, require frequent use of Auto Diagnostic tool check the car performance, especially in the automotive fuel injectors need to check.

Fuel injector cleaning is usually lorry wash and ultrasonic cleaning both methods, along with the car cleaning to use special EFI car wash liquid, Its advantage is not need to be removed from the car fuel injector, and the operation is convenient; drawback is cannot directly observe the working state of the fuel injector, and the effect is not ideal.

Ultrasonic cleaning is the injector removed from the engine installed on the ultrasonic cleaning tank cleaning, Its advantage is high cleaning quality, still can put fuel injector to injector test bench for fuel injection quantity, leakage and Spray testing situation; the disadvantage is expensive equipment.

We can choose with the carburetor cleaner cleaning injection device. Optional qualified carburetor cleaner, spray evenly on the injector, the effective removal of grease and soot and other plastic material, after the cleaning is done, you can use Launch X431 Creader VI+ or Launch Creader V+ tools check the injector working conditions.

The specific method is:
a, Remove the injector from the engine;
b, dedicated connector carburetor cleaner tank and injectors;
c, The carburetor cleaning agent is sprayed into the injector, check the amount of leakage in the injector is not energized condition;
d, intermittently energizing the solenoid injector, let carburetor cleaning agent injector spray atomization while observing their situation.

There are many types of cleaning agent now, generally in the bottle are indicated, so owners need to look carefully at the time of purchase to understand the characteristics of the cleaning agent, do not buy low-quality cleaning agents, to avoid unnecessary losses, you can use Autel Maxidiag Elite MD703 or Autel Maxidiag Elite MD702 Tools check the injector, it will prompt the purchase of which a cleansing agent.
Source: http://www.focalobd.com/blog/common-method-for-cleaning-automotive-fuel-injector/

Automotive engine requires regular cleaning

Because the car use environment is very complex, the engine used for a period of time, into the engine room of dust and impurities will form carbon and resin and other harmful substances in the engine surface, if long time don't clean up, these harmful substances will be converted into sludge, penetration in the surface of the engine will not only cause metal parts rusting, plastic parts deformation aging, but also lead to increased engine power reduction and increase of fuel consumption, and even generate various oxidation damage to the engine, these fault you can use OBD Diagnostic Tool to check it out, so regular cleaning of engine is very necessary.

You can ask professionals to clean the engine, you can do it yourself by following the procedure to clean the engine. First, the automotive electronics with plastic film masked, then use a wet towel to cover the film above, to prevent high-pressure water rushed into the engine, cause the car difficult to start. By the side of the engine from top to bottom will be attached to the class dirt engine compartment side and engine appearance rinse with water cannons; next, engine external cleaning agent evenly sprayed on the engine and engine compartment periphery. If necessary, you can use the Launch X431 GDS or Launch X431 Diagun III tool.

After about three minutes, with a fiber brush to clean all parts reach of the engine compartment, and rinse with water cannons quickly brushed off the dirt. Then the engine external cleaning agent sprayed on engine surface. Repeated 2-3 times, until the appearance of the engine clean.

In addition, the appropriate selection of some of the gasoline additive products can also reduce the engine oil contamination and carbon deposit, you can periodically use Autel MaxiSys Pro MS908P or Autel Maxidiag Elite MD702 tool to check the car's performance.
Source: http://www.focalobd.com/blog/automotive-engine-requires-regular-cleaning/

Three kinds of methods to solve the problem of car horn

The horn is a frequent use of the device while driving, if the speaker fails, it will be very difficult when driving. Sometimes honked the horn, the sound is very hoarse, and even a little voice at all. We need to use the Auto Diagnostic Tool timely detection, we take a look at how the horn works. When the horn button is pressed, the battery current will flow through the loop on the horn relay solenoid, solenoid relay attract dynamic contact switch is closed, current will flow to the speaker place. Electromagnet current work inside the horn, so that the diaphragm vibration sound.

According to the author's experience, many faults related to the speaker, problems arise fault is often the horn itself . Especially flawed speaker installation location of some design, when it rains very easy make the speaker wet in the rain, causing damage to the speaker. When the speaker does not ring, common failure parts are nothing more than 3 points, that horn itself, horn switch contacts and horn line, when a fault occurs can be used Launch X431 GDS or Launch X431 IV GX4 tool to check the following steps:

(1) sometimes does not ring. Press horn switch, if the horn is sometimes loud, sometimes does not ring, mostly inside the horn switch contact contacts well, some of them are horn itself.

(2) voice hoarse. Mostly due to poor contact plugs, especially the various contacts around the steering wheel, as a result of frequent use, easy to make contacts to wear.

(3)Completely does not ring. First check to see if the fuse is blown, then unplug the speaker plug, use Autel MaxiSys Pro MS908P or Autel Maxidiag Elite MD702 tools to detect whether horn switch is electricity. If there is no power, check the horn and horn relay harness; if there is electricity, it is the speaker itself is the problem, then you can try to adjust the adjusting nut on the horn to see if sound, if still does not ring, you need to replace the speaker.
Source: http://www.focalobd.com/blog/three-kinds-of-methods-to-solve-the-problem-of-car-horn/