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    Diagnostic trouble code associated with the battery
    Engine code for the ABA or AAA some of the Golf, Jetta and Passat, the engine code for the ABA Cabrio (1996 ~ 1999 production) and the engine code for the AES Eurovan (1997 ~ 2000 production) cars sometimes appear P1580 and P0103 this Two diagnostic trouble codes. The cause of the malfunction is that the owner is trying to start the car when the battery is in poor condition.
    The specific fault manifestation is that if the engine is attempted to start the engine at a battery voltage of 7 volts or less, the diagnostic trouble code P1580 is activated. At this time, if you start the car and travel, the second fault diagnosis code P0103 will soon be stored in the computer. If the throttle body is not adjusted when the diagnostic trouble code is cleared, the fault code will be stored again; or if the throttle body has been adjusted but the fault code has not been cleared, the fault signal will be displayed on the detection tool. In the above case, the car can not start, or poor driving performance.
    In order to eliminate this failure, you should identify and eliminate the battery charge failure. After troubleshooting, clear the diagnostic trouble code, and then adjust the throttle body. Finally, clear the diagnostic error code again and return to the original state.
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    New alignment parameters
    For the mass production of the new Beetle after 1998, the parameters of the camber have changed. It should be noted that the new rear camber parameter is -1 ° 27 '± 2'. In addition, Volkswagen said the front camber is not adjustable, but can be modified by slightly moving the sub-frame, the adjustment range is about 10'-15 '.
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    Cruise control does not work
    Some of the 1995 and updated Volkswagen Golf, GTI and Jetta cars equipped with a 02A manual transmission may have failed to fully return the clutch pedal, which in turn causes the cruise control function to be ineffective. Volkswagen said the clutch pedal center spring is out of place is the cause of this failure. During maintenance, the owner should check whether the center spring is still in the original position below the dashboard. If the center spring has been lost or falls under the carpet or seat, it should be re-installed. Then replace the previous pedal bracket with a new pedal bracket with part number 1HM419555D and install a new pedal stopper with part number 861805461 on the bracket.
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    Shift lever vibration / knocking phenomenon
    The models affected by this failure are the 1997 Volkswagen Passat and the 1999 Volkswagen Golf / Jetta with the 02A Type Speedway. At first, the owner may think that the original model design is so, their own powerless. But Volkswagen says the vibration / knocking faults that occur when the shift lever is in the 1, 2, 3 or 4 gears are likely due to the vibration of the transmission at the selector shaft, variable speed cable and shift lever position The So, how should we rule out this failure?
   Place the shift lever in the neutral position, remove the necessary parts, and remove the shift lever from the shift bridge. Then, remove the selector shaft from the gearbox. Carefully expand the two mounting holes on the selector shaft housing to 2 cm and reinstall the selector shaft housing with the mass sealant, part number AMV18820003 (or similar). Finally, adjust the selector shaft housing as follows:
    If the vibration / knocking phenomenon occurs in the 1 block or 3 block, should be the best possible clockwise rotation of the selected shaft housing, tightening torque of 24N · m. If it appears in the 2 block or 4 block, should be the most possible counterclockwise rotation of the selected shaft housing, tightening torque of 24N · m. At this time, other parts can be assembled in place to check whether the fault has been ruled out. If not enough, should be replaced with part number 02J301233D of the optional shaft and part number 02J301231 the selection of shaft housing. However, before installing the two components, be sure to expand the mounting hole on the new housing to 2cm, which will completely eliminate the shift lever vibration / knock failure.
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    Oil overrun warning message
    Volkswagen warned that if the engine in the following models filled with excessive oil, it will lead to activation of the PCM fault diagnosis code: the latest golf, Jetta, Passat, box trucks and the new Beetle. Volkswagen suggested that the engine oil filling volume should be smaller than the maximum capacity of about 0.57L. After filling the proper amount of oil, start the engine and preheat it to normal operating temperature. At this time, turn off the engine, wait about 3 minutes, check the amount of dipstick. Finally, if necessary, refill 0.57L of oil.
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    Improved cam drive chain
    In repairing the 1997 or new Volkswagen Eurovan with a 2.8LVR6 engine, the owner will find that the engine is equipped with an improved single camshaft with a tensioning plate instead of the previous double drive chain. This type of transmission chain tensioning device is not oil, it does not need lubrication. Single camshaft drive chain, tensioning device and improved tension plate are installed in groups, otherwise it will not work properly. The same is true for the double drive chain, which works only with older tensioning machines that have an oil path. Owners do not confuse their matching relationship. In addition, do not use red or other mechanical tools in the single-time transmission chain for signs, so as not to weaken its strength.
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    Wiper fake fault
    1999 GT1, JettaGLX and Passat GLX "wiper failure", is actually a false fault phenomenon, sometimes the normal working condition.
    The model is equipped with a rain sensor, if the sensor can not sense the rain on the windshield, it will control the wiper in the scratch after a stop working. At this time, the rain sensor will automatically reduce or prolong the duration of the wiping according to the size of the moisture on the windshield. The wiper switch itself can adjust the sensor's sensitivity.
    However, if the ignition switch is turned off, the rain sensor is activated again. This is done by closing the wiper and then returning to the intermittent wiper position. Understand the working principle of the sensor, the owner explained in detail the work of the system will help customers solve the problems encountered on the road.
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    Throttle pedal vibration
    Newborns produced in 1998-2000 and New Jetta cars from 2000 to 2000 (both equipped with 2.0L engines) can feel the accelerator pedal vibration at idle, and some cars with auxiliary air injection systems are in the engine cover position Will hear a percussion. This vibration and / or noise is likely to be caused by a throttle cable that touches the hood. In the event of such failure, an improved clamp can be installed on the auxiliary air injection pressure hose and throttle cable, part number 171201815A.
    Audi
    The engine is running but can not start
    1998 - 1999 produced some equipped with 5-valve 2.8LV6 engine Audi A4 and A6 cars, may be due to serious coke and can not start. Specific diagnostic steps are as follows: first of the power transmission management system to conduct a thorough detection to see if there is a fault code. If not, check the engine water temperature sensor (CTS), the working conditions of the gas during operation, the throttle opening angle (should be greater than 6 °), fuel pressure, compression and cylinder leak. Low compression indicates that there is coke in the intake and / or exhaust valves and the combustion chamber, which can cause the valve to not function properly.
    To prevent future carbon deposition, should be installed part number 078121113G new thermostat and part number N90136802 new O-ring. Then, the engine was subjected to charcoal treatment using an X-TendV.I.C. type combustor cleaner (part number 61510) from Wynn Corporation approved by Audi. The owner should also understand that he used the fuel may be the problem of insufficient weight of detergent. If the fuel used is not met, Audi recommends that the owner use the Autobahn gasoline additive, part number ZVW239003. In addition, the Audi company said the new spark plug components (Audi part number of 101000067M, NGK part number BKR6EQUPA) also help to prevent the occurrence of carbon deposition. Maintenance is completed, the vehicle should be carried out before the road to the road test, the engine load operation (speed 4000 ~ 6000r / min) test about 15km.
    Audi
    Wind noise at the bottom of the car body
    2000 Quattro four-door car at a speed when driving, the car will be the end of the wind noise. Encountered this phenomenon, the first step in diagnosis and maintenance is likely to be road test, and in the driving down the window to detect the presence of wind noise. But do not do that! According to the Audi car company, when the window is closed, this noise is easier to hear. The reason may be caused by the loss or improper installation of the rubber stopper or the lifting fulcrum pad at the bottom of the car.
    If you hear this wind noise, you should safely lift the car, check the bottom rubber stopper and lift the fulcrum pad. If the bottom rubber stopper is lost, the wind noise will form a resonance at the bottom of the car and reach the seat room. To eliminate this noise, insert the appropriate size of the floor in the lost position, be careful not to block the drain hole. And then test, check whether the noise has been excluded.
    Audi
    The brake makes a sharp noise
    All Audi cars are in the front, rear disc brakes appeared on this noise. To this end, the German manufacturers have given the following solutions: first remove the wheel and brake calipers. Then, each hub and rotor are sorted by center punching. At this time, remove the rotor, with a circumferential grinder and 80-size grinding wheel to clean the rotor. Grinding the leading edge of the grinding wheel, gently grinding in the clockwise direction, in order to get the textured pattern, should continue along the clockwise direction, but the use of grinding wheel trailing edge.
   Next, if necessary, clean the surface of the brake pad. Then gently wipe the chamfer edge of the brake pad with a file. If the surface of the brake pad has a sticky coating, it should be cleaned. Finally, use a suitable cleaning solution to clean the brake pad.
    Then, clean the brake caliper contact and apply a thin layer of high temperature grease to the surface of the caliper piston and the brake pad. Press the sort mark again to place the brake rotor in the correct position. Then install the brake caliper to ensure that the brake pad is installed in the correct direction. Finally, test, check the brake function is normal and whether the noise has been eliminated.
    Audi
    The mystery of the mirror after heating
    Audi Motor Company explained that all models produced after 1997 with a heating mirror (including automatic fuzzy type), there will be some strange phenomena, such as in the summer after the car mirror will emit steam. This is because these special mirrors are given a kind of juice after the ignition switch is closed. This means that no matter how high the ambient temperature, the mirror glass will be heated. In fact, the driver's car mirror temperature can reach 60 ℃, but because the passenger side of the mirror is smaller, its temperature is about 32 ℃ lower. Usually we think this is normal.
    However, if it is necessary to replace any of these mirrors, you can only use those with a hot switch of the new car mirror. It can be installed from 1997 to 1999 production of the Audi car. Note that these mirrors do not need to be replaced in pairs.
      Audi
    The fault indicator light is on and various EGR (exhaust gas recirculation) diagnostic fault codes are activated
    If you find the 1995 Audi 90 or the MMS-311 fuel system / engine with the AFC's Audi Convertible, a fault indicator light is lit and a number of diagnostic faults associated with the EGR system are activated, but Do not cause malfunction, check the EGR valve and its vacuum tube directly.
    The service personnel will find that the black vacuum tube arranged above the EGR valve is likely to be too close to the valve body so that the rubber tube is rubbing and causing leakage, resulting in the above failure. The solution is very simple: just replace the black vacuum tube, and leave a large enough gap, so no longer with the EGR valve friction.
    Audi
    The fault indicator light is on and the fuel level is low
    If the 1995 Audi A4 or A6 with the OBD II Emission Control System is less than 3 gallons (13L) fuel in the tank, a variety of diagnostic fault codes are activated and the fault indicator lamp is illuminated. This low oil level (3 gallons) can cause a lean mixture to occur, and under certain driving conditions (such as idling turns) can cause a flame failure. However, even if the oil level is suspected to be low, do not hastily pick up the fuel gun refueling, should be carried out routine dilute mixed air condition inspection to exclude other possible failures. If no other faults are found. Ask the driver to be sure that the fault indicator light will light when driving in low oil level. Once the fault has been identified, the fault code can be cleared and a thorough road test is performed to ensure that the fault indicator lamp is off.
     Audi
    Sag of the D column
    The affected models are some of the 1999 Audi A4 and A8Quattro sedans. The pits are caused by shrinkage of the insulating foam on the metal panel attached to the vehicle body during the initial curing process. As the temperature changes, the force generated by further movement of the foam will form pits. Please note that the factory number from the 4DYN000500 A8 models and 8DYA003420 A4 models have been in July 1999 began to solve this phenomenon.
    To solve the problem of depression, Audi Motor Company recommended the use of heat gun, the area around the depression heating. Hold the gun, about 5mm away from the paint surface. Be careful not to overheat the panel. If the temperature of the hot gun is set too high and the gun is moved too slowly on the surface of the paint, the paint may be discolored or peeled. The heat gun in the paint surface slowly oscillating to the panel temperature of about 100 ℃. At this temperature, the foam will be disengaged from the panel and the recess will disappear.