Keep a car in winter Ten concerned about the main points

It was winter, the obd2 android owners do not forget to maintenance of the car in order to be found during maintenance and troubleshooting.
1, body
Paint coating or sealing glaze for the car to be the best in the winter, are able to resist the erosion of acid rain snow. In addition, after the snow road sprinkling salt water, salt water splash to the body of the vehicle with great harm to the paint, advance somewhat preparedness, snow travel is not afraid to damage the paint.
2 Chassis
Winter, car chassis car code reader always directly deal and rain, snow, and very easy to rust. Snow over the fine weather, the chassis of the car began to rust. So, in the rain and snow before the advent of you may want to take a moment, to the chassis to be a the antirust care.
3, battery
Battery is most afraid of low temperature, is much lower the electrical capacity battery capacitance than room temperature in the low temperature environment. Therefore, before the advent of the cold season, should supplement the battery electrolyte, at the same time clean the battery terminals and coated with a special oil to protect and ensure a reliable start to extend battery life. If the vehicle is parked in the open air or cold storage for several weeks without, the battery should be removed and stored in a warmer room, to prevent damage to the battery icing.
4 tires
Tire rubber will car diagnostic tool harden in the winter and relatively brittle, friction coefficient will reduce the tire pressure is not too high, but more can not be too low. Low external temperatures, the tire pressure is too low, the soft tires serious accelerate aging. In addition, the tire wear very different inside and outside, in order to ensure safety to reduce wear and tear, should periodically replace the tire position.
5, the light
The winter fog blooming, low visibility, they must be timely observation of fog lights, high level brake light is working properly, found that black light bulbs must be replaced as soon as possible. The ordinary halogen headlamps general use of the light will be reduced after two years, the best time to replace or repair.
6, the cooling system
Regularly check the MB star water tanks, pumps and belts, pipes and other parts are working properly. Some cars summer water temperature is high, the repair personnel put the thermostat removal, can solve the problem in summer, but winter on the reverse. If you do not pay attention, it is possible for a small pipe, a waste of a bucket of antifreeze.
7, heaters
The car's heater system did not use for a long time, it is inevitable there will be a lot of glitches. Such as hot air fan running abnormal sound duct blockage, although not affect traffic, but maintenance is very troublesome. So, be sure to remember to take advantage of the opportunity of routine maintenance, repair station to conduct a comprehensive inspection of the car's heater system, the problems to solve.
8, antifreeze
Antifreeze seemingly trivial, but the car is great, ranging from clogged pipe, heavy corrosion damage to the cylinder, so be sure to check whether the lack of fluid, whether the deterioration replenish or replace. In general, the antifreeze should be changed every two years.
9, the engine
Owners often find OBD2 Code Scanner winter car engine as if the person is depressed, the work is not hard. Because of low winter temperatures, resulting in antifreeze, motor oil and other effects have diminished, the engine is less than ideal working environment. Antifreeze, motor oil, gear oil, in accordance with the provisions of the time or mileage replacement, must not improvise. Dirty driving environment, the best time to change the oil in the winter than the time specified in the instructions on the advance. In addition, winter is the best choice for manufacturers stipulate grade gasoline in the fuel, so that the power will be better, such as the usual 90 gasoline, winter can be exchanged for 93 gasoline.
10, a windscreen
Winter wiper should regularly scrub, snow ensure that scrape the windshield. Out at dawn wiper to the snow stick in the windshield, do not use hot water to rinse directly so easy to make the windows burst because of temperature changes, wiper deformation. The correct method is air conditioning to the hot air hair mode for the front windshield until the wiper naturalized open. In addition, the glass of water should also replace antifreeze.

The car thread locking measures

Car thread obd2 android Vice securely connected or not directly affect the use of the car and this locking measures in the design of the car, friction locking spring pad locking, the preload locking or specially since locking threads, etc.; mechanical locking with locking cotter pin, locking plate locking fuse locking.

1, spring washer should be good elasticity, suitable size
Spring washers are easy to install, low manufacturing cost, and is widely used in the automobile. It is the use of the elastic deformation of the gasket, so that the axial direction of the screw vice tensioning gasket beveled tip also contribute to the anti-loosening. However, car code reader this washer during use due to heat or long compression lose their elasticity. Therefore, before installing spring washer, you should check whether the failure of its flexibility. Check is to look at the two ends of the gasket at the interface whether or shifted up and down a certain angle, this washer hexyl VALID if the stagger angle is small or not staggered. Washer size should correspond with matching bolt size washer outside diameter slightly kid nut outer diameter appropriate.

2 cotter pin length should be appropriate and engine connecting rod connecting bolts loose, cause connecting rod bearings Songkuang, the engine produces abnormal noise, or even damage to the engine-related parts. Decomposition abnormal sound check some of the connecting rod bearing failure, often found individual locking nut on the bolt connecting rod cotter pin has gone, the reason is mostly due to the cotter pin is car diagnostic tool too long, high-speed movement of the crank arm scraping hit break, finally shedding. The method of determining this cotter pin of the correct length is a cotter pin inserted through the corresponding hole of the lock nut, the percussion hammer in place by hand, the cotter pin projecting does not exceed the length of the crank arm plane, and then required the cotter lock i.e. can.

3, Disc spring washer assembly should be directed to
The disc spring gasket on the mechanical surface will not produce more scratches, thus increasing use in the car, but if improperly installed, will not serve to prevent the thread loose collaboration with. For example the second axis of the: Dongfeng EQ1090 car transmission rear flange locking spring gasket installed between the nut and OBD2 Code Scanner the flange dish dread, if improperly installed resulting in the nut loose, cause the speedometer drive gear slipping the odometer speed indication and Mileage errors. Meanwhile, around the second shaft traverse so as third gear skip shift occurs. The correct orientation should be of the belleville spring washer concave surface facing the connecting member, the convex surface facing the nut. Thus tighten the nut, since the belleville spring washer is deformed by force, the support surface by reaction force play lockup role.

4, the insurance should be correct wire taut direction
Some parts of the chassis of the vehicle (eg, shift forks and shift fork shaft connecting bolts) insurance wire to prevent screw loosening, it is commonly used in the threaded locking bolt group. The insurance wire locking more reliable insurance wire size selection and penetration of the screw holes taut direction, but the installation should pay attention. Insurance wire is too rough is not easy to go through, the diameter should be slightly smaller than the diameter of the perforations, when a slight resistance can be interspersed. Wire penetrate right direction of the difference between insurance: the to a bolt Loosen insurance wire in a taut state, that unscrew the two screws tighten a bolt will be its adjacent right otherwise incorrect.

5, the locking MB star plate should be locked in the side plane of the nut
Larger pieces on the car nut locking constant locking of the locking plate, such as automotive steering knuckle lock nut transmission the second axis of the front locking nut. Locking tabs lock nut torque required to tighten the locking tabs off to the one side of the plane of the nut with a hammer to fit snugly against. Locking plate must not be attached to the edges and corners of the nut, so that is not good to play the role of the locking.

The car modification Mistakes knew

Today, many of obd2 android my friends in the car owners love their cars "beauty" or "face" to carry out some simple car modification was to the comfortable and beautiful people in order to enhance the dynamic performance.
The face of the numerous conversion projects, experts recommend choosing modification projects for their actual needs and body condition.
Myth One: The converted audio "the more the better."

Some of my friends car code reader think that when the modified car stereo multi-install wireless remote control, multi disc converter auxiliary facilities can enhance the actual effect of the car stereo. In fact, the host of the sound is the soundtrack of the entire sound system, to determine the sound quality of the core. Speakers, crossover expanding device (AMP), overweight speakers (Sub Juan woofer) also have a significant impact on the overall effect of the audio, if ignored any more, even if the number of installations of more complex functions ancillary facilities for practical effects in terms of improving sound to no avail. Therefore, instead of doing some modification, it is better to costly and laborious practical to choose a good host.
Myth: soundproof thoroughly
Some car owners do cars do sound excessive pursuit of sound insulation, sound insulation requirements will be extreme, even hope can not hear the sound of the engine.
We can imagine, if the driver car diagnostic tool can not hear the sound from the road and power systems, will lose access to the relevant information on road conditions and vehicle condition and judgment, to affect traffic safety. The ultimate purpose of the modified car noise, not to eliminate all sound, but to eliminate the noise. Therefore, do not the car interior space transformed into an out-and-out "Silent World" penny wise and pound foolish.
Myth: blind installation of the tail
Retrofit tail now also become a fashion, but not all models are suitable for mounting tail, because the tail of the role is to increase the stability of the body, the more crucial for large displacement of the car, but for small-displacement models Install the tail will have a certain impact on the speed. In addition, the rear wing is a spoiler components, simple installation of the tail in order to achieve exaggerated or aesthetic effect, it will play some negative role. Because the role of the tail is to raise under pressure in the case of high-speed vehicle dynamic balance of features and body, but after careful adjustment to achieve the desired effect. Blind installation of the tail can be counterproductive in the car at high speed, such as cause car unidirectional balance problems affect car safety.
Myth: loaded "surrounded by" OBD2 Code Scanner demolition bumper
Some of our friends to make the vehicle more elegant shape, installed for the car surrounded by large. Retrofitting "surrounded" does make the vehicle lines look more smooth, but some friends over "beauty", the installation is not surrounded by large components installed in the original car's bumper, and select demolition out of the original car bumper, then install.
So if the car is beautiful, but the people in the car also will become unsafe. Remove the original car bumper, means that if the car in case of a collision, the lack of bumper protection, and the cars are likely to suffer more serious injuries.
Myth: installation of large-diameter exhaust pipe car will run faster.
The pursuit of speed is the dream of many of my friends, some owners believe that the installation of large diameter exhaust pipe can let the car has more power, also appears on the sound style.
An auto repair MB star experts said, simply replace the exhaust pipe for the power upgrade with little effect. Under the premise of the engine does not do the conversion, only to replace the exhaust pipe, and can not play the role of power improved significantly, and this is even harder for small displacement naturally aspirated car. From the actual operation, the most obvious effect is simply modified the exhaust pipe of large diameter to form a sound momentum, but it will cause noise pollution.

Automotive transmission disassembly points

Automobile transmission disassembly precautions:

1, first remove car diagnostic tool the gimbal screws, transmission and drive shaft universal joint separation; then remove the clutch cover screws, so that the transmission and clutch; remote manipulation of the transmission, the control mechanism is the transmission body separation last removed the transmission from the car.

2, sludge and dirt, cleaning transmission outside attention to the protection around the head of the shaft. Latest the car cushion rankings released 10 strong

3, unscrew the MB star the decentralized oil drain plug, put the net transmission lubricants, and then screw the oil drain plug.

4, looking for a clean and dust-free venues removal tool and Copper Rod, began to disassemble the transmission. The disassembly sequence is generally: the transmission cover, the first shaft, the second shaft, an intermediate shaft, the reverse gear shaft.

5, demolished parts, optimistic about the parts of the original direction and position after the demolition, if necessary, make a record; the removed parts disassembly sequencing, sub-site emissions neat, if necessary, available line or wire parts order strung together; gear sets of the original orientation and position on the shaft, to prevent loading the wrong or missing equipment. Car up to teach you how to buy a car cushion

Disassembly of car code reader all parts should be clean, and do the appropriate checks, can not continue to use should be replaced; demolition of oil seals, gaskets generally should not continue to use and should be replaced.

7, before assembling various bearings, oil seals, shaft keyway, the bore of the gear and transmission case bearing bore with gear oil or engine oil, and to replace the paper pad soaked in oil. Taobao car cushion

8, the assembly sequence disassembly sequence the contrary, that after the removed parts first load, so that all parts are installed to the original position, the installation process often turn the mating parts, pay attention to the direction of oil seal and shall not be damaged.

9, install obd2 android transmission cover, should check the site filled with a seamless parts, the shaft and fixed gear axial movement throughout the pad of paper is intact, whether the gear engagement within all tooth width; using hand struck the sliding gear, to see whether the axial movement of the engagement to the whole tooth width; hand rotation of the first axis, respectively try each block should be flexibility to smooth rotation, no jam phenomenon. Adding the right amount of oil in the gearbox body in accordance with the regulations.

10, the fork mount and secured to the corresponding fork shaft, and then loaded transmission cover the corresponding holes in the fork shaft. Installing fork shaft to pay attention to the self-locking mechanism and interlock mechanism to be loaded into the corresponding holes in the fork shaft side of the three grooves response to the direction of the positive self-locking mechanism Ball fork shaft has a groove side of positive interlock mechanism. Each fork shaft are installed in place after it was placed in the neutral position, the slide gear in the shift power transmission mechanism is also placed in the neutral position, the transmission cap is mounted to the transmission casing, each fork precisely mounted to the corresponding gear dial tank fitted with connecting bolts, in accordance with the provisions of the order and the provisions of the torque tighten the bolts, hanging with the shift lever into different block, followed by checking the success Guadang not linked on gently back and forth rotation The first axis, still hanging on Remove the cover check.

11 installed, OBD2 Code Scanner to make a trial run, each block should be flexible rotation, no oil leakage, oil spills and jam phenomenon, is not allowed in any gear gear jump, the phenomenon of chaos gear shift should be lightweight and comfortable not abnormal noise and overheating....

The Toyota Camry AFS fault lights

A GAC Toyota Camry sedan. Customers OBD2 reflect the the AFS fault on the vehicle instrument lights, come to my shop to check. Vehicles into the plant, technicians start the engine, lit AFS fault is not found. By asking customers, lit the lamp on the night before, and later went out. IT-II, the technicians check the fault code B2412 historical fault code (see Figure 1) in the control unit.

Fault diagnosis: fault code B2412 the headlight rotary obd2 china motor failure or wiring open circuit / short circuit. When the rotating electric machine after receiving a signal from the AFS ECU starts running, and transmits that signal of headlamps direction and headlight rotation state of the motor to AFS ECU. Technicians determine the fault, the first IT-II active testing to confirm that the left front headlight rotary motor work, the results of diagnostic motor does not work. Since the motor is not working we have to first check the lines, check the ECU-IG2 and H-LP LVL fuse normal, normal motor power circuit. Remove the headlight, disconnect the A66 headlamp assembly connector, check the plug resistance is normal, grounded and normal.

Will AFS ECU failure? Disconnect car diagnostic tool the the AFS ECU connector, A61-1-A61-23 terminal resistor and power supply IT-II examination were normal. The fault checking this direct replacement headlight assembly in accordance with the maintenance manual requirements. The external Check all normal, we only open the back cover of the headlight shell ready to replace the headlights, but then found abnormal, normal headlight plug packed position into linear, and the plug the wrong place, such as the Figure 2. Plug stuck in the side of the hand and a pull out, the first impression is that this bulb is not installed, remove the bulb ready to reassemble the trial, but how loaded is not in place, borrowed from the warehouse of a new bulb, contrast learned (as shown in Figure 3), this bulb of the lamp is not original, the bulb fixed foot position and the original does not like causing how loaded plug position is not right. Are factory fitted bulbs, 3 days after the return visit, customers troubleshooting.

When you turn on obd2 scanner the headlights, rotate the motor self-test, plug the wrong place, causing the rotation when the card issuer. Cause a malfunction lamp is lit. Customer later said the truth, lights, check a few days ago in my shop, my shop is recommended to replace the lamp, too expensive to go out to the market installed a did not think a light bulb cause malfunction lights, but fortunately no cause Shigehito accident . Towel in the actual repair work, lack of attention to some of the details and cause failure, though not occur in the shop, but this situation we can learn from.

Knowledge of car maintenance - car wiper how to check on a regular basis?

Regular obd2 china inspection of the wiper
Recently, a friend of mine drove back from the suburban Chengdu, the middle of it began to rain, rain mixed with dust on the windshield was a big mess, resulting in blurred vision. So hurry to open the wiper, who knows that looks quite new imported cars, wiper whirring ringing is scraping clean. Asked about the matter, the friend said he rarely pay attention to when the car wash wiper strip. , I want to remind motorists friends, do not let the wiper strip into traffic hazards threaten the safety of you and your car.

Well, wiper OBD2 strip how to care for it?
First of all, the car wash, do not forget the wiper. Wiper resting on the windshield, but routine maintenance people very easy to turn a blind eye to problems, etc. were using before. The wiper blade maintenance method is actually very simple. In addition to cleaning windows for each car wash, it is best to use glass cleaning solution to wipe wiper strip so that the the wiper strip of life on longer. If you do it by car wash shop clean, remind the clerk to do the work for you, the wiper switch is placed in the position of the various speeds, check different obd2 code reader speed wiper to maintain a certain speed. There is, check the status of the wiper and wiper strut swing uneven or missing scratch. These two failures of any kind, mean wiper blades damaged. Also, pay attention Wiper vibration and abnormal noise at work.

Second, regular inspection essential. If various complete failure phenomena, will certainly want to check the wiper blades. The method is to pull up the wiper fingers touch the cleaned rubber wiper blades, check for damage, and the elasticity of the rubber blade how. If the leaf aging, hardening, cracks, and it should be replaced. Replacement blades is not complicated, you can do it yourself. The first figure out your car with what specifications wiper blades, can refer to the vehicle manual. If confused, car diagnostic tool can help identify the parts store clerk. Also, pay attention to strut connected to the wiper arm of the match, because some arm screws on the rocker, while others are built point convex buckle lock, buy be sure to look.

Install wiper blades only need a very simple tool, a Phillips screwdriver has enough, if raised, even a screwdriver can be without. Replacement blades: wiper rocker arm pull up, remove the screws (convex button, just press convex buckle), the lifting of the lock. To pay attention to convex buckle dirt Ningzhu, if there is, it is best to use some lubricant spray, in order to disassemble. Either arm, remove after had to be careful, do not let the rocker arm bounced obd2 scanner back to the glass, to avoid damage to the windshield.

Audi A6 engine idling easy to turn off

An Audi A6 auto scanner sedan, in the process of moving, low, normal, high-speed work, but releases the accelerator pedal the engine into the idling condition, the engine sometimes stall.

The fault diagnosis: Chengxiu car first validation failure phenomenon. Start the engine, the engine idle speed is obviously unstable, and is accompanied by serious jitter. This phenomenon may be the engine at idle when the concentration of the mixture or ignition of the problem, or the existence of a purely mechanical failure, cylinder wear, valve closed lax. In summary, the reasons for such failures are generally two possibilities: an electronic control system failure, mechanical system failures.

First VAG1551 detection auto diagnostic tool engine electronic control part, no fault code display. To read the data stream for each of the sensors, actuators, or are within a predetermined range; ignition advance angle are within the normal range, but the engine idle speed of 450 r / min ~ 600 r / min fluctuations. According to the test, you can basically exclude the possibility of failure of the electronic control part, the analysis of other factors that can cause the engine idle speed is easy to turn off: cylinder pressure; valve closed lax; intake system leak; insufficient oil pressure or oil the dirty block; dirty injector plugging or wear; idle speed control valve is blocked by dust or wear; leakage or insufficient ignition energy ignition system; spark plug adverse or failure; fuel evaporative emission control system leak; exhaust gas recirculation (EGR) system bad; jams, etc. of the exhaust gas purifying apparatus.

Measuring the cylinder pressure for each cylinder, at 900 kPa to 1200 kPa, normal; detecting intake manifold vacuum, normal; detecting fuel system pressure, but also normal; clean the fuel supply system and the injector is detected after each cylinder injector the fuel injection quantity, normal; detection of each cylinder ignition, normal; replacing each cylinder spark plug test failure is still the fuel evaporative emission control system to stop working; by blocking fuel vapor channel method to test fault still; blocking EGR the system exhaust Channel to suspend work, found fault disappears, thereby determining the fault of the car by the EGR system failure caused by

The working principle auto code reader of the Audi A6 car EGR system, the engine control unit (ECU) according to the engine speed, the load (i.e., throttle opening degree), the temperature, the intake air amount and the exhaust gas temperature control of the EGR solenoid valve open in a timely manner, intake manifold vacuum degree by the electromagnetic valve into a vacuum film-forming chamber of the EGR valve, the diaphragm Tie the EGR valve open, a small portion of the gas through the EGR valve in the exhaust gas into the intake system, mixed with the gas mixture into the cylinder participate in the combustion, in order to reduce the combustion chamber in the combustion temperature, inhibit the formation of NOx, thereby reducing the content of the exhaust of NOx. However, if the excessive exhaust gas is involved in recycling, will affect the ignition performance of the mixed gas, so as to affect the power of the engine, especially when the engine idling, low speed, low load, or cold machine, the amount of exhaust gas recirculated will seriously affect the the performance of the engine, so when the engine is in the condition above, ECU controlling the exhaust gas does not participate in recycling, to avoid the operation of the engine affected. When the engine exceeds a certain speed, load and temperature, ECU controls a small portion of the waste involved in recycling, and is involved in the displacement of the recirculated according to engine speed, load, temperature and exhaust gas temperature varies, in order to achieve control exhaust the lowest NOx content.

Structure and working principle of the EGR system analysis can be seen, the fault of the car could be the EGR solenoid valve closed lax exhaust uncontrolled been involved into the cylinder combustion, affecting the performance of the mixed gas of fire, causing the engine idling-stop; The EGR valve is closed or lax, the control of the exhaust gas from the EGR valve directly into the cylinder participate in the combustion, the impact of the ignition performance of the gas mixture, resulting in an idling-stop.

By blocking Launch X431 the the vacuum channel between the solenoid valve and the EGR valve, found fault still. Thereby determining the failure is caused due to the EGR valve closed lax. Remove the EGR valve checked and found the valve leakage; decomposition EGR valve inspection found both carbon deposition on the valves and valve seat. Originally coke led to the EGR valve closed lax.

Troubleshooting: auto diagnostic software clean carbon deposits on the EGR valve and valve seat and valve and valve seat with abrasive paste grinding, install retest the car after test does not leak, the engine idle smooth motion releases the accelerator pedal, the engine will not turn off then VAG1551 detection engine idle speed is stable at 800 r / min, the fault is completely excluded.