Fault 1 Pressurized pressure out of control causes the intake hose to collapse
    Failure: the user reflects the vehicle idling instability, the speed up to 120km / h after no longer, and the engine noise is great, in the car feel the same aircraft take off the same noise, people unbearable. Related to read: [topic] want to save fuel a trick to help you drive "oil tiger" [topic] enjoy the cool summer summer car care Raiders
    Check: use the diagnostic instrument VAG1552 into the engine electronic control system query fault code: 17963 - exceeds the maximum boost pressure (sporadic fault). Checking the appearance of the engine found that the intake manifold connected to the throttle valve fell off.
    Analysis: According to the stored fault code and intake hose (Figure 1) off the phenomenon, you can determine the boost pressure is indeed too high. Further inspection revealed that the vacuum tube of the booster control valve was disengaged, resulting in the inability to adjust the supercharging pressure, which caused the intake hose to collapse due to the supercharging pressure and the engine power.
    Exclude: Connect the vacuum tube and intake manifold of the booster control valve.
    Fault 2 After the intercooler is damaged, the engine is unstable
    Fault: The engine is running smoothly.
    Check: found that the cause of the engine is not smooth because the cylinder is not working, the cylinder measurements found that the cylinder pressure is only 340kpa. Ask the user that the car is the accident car, turbocharger system intercooler (Figure 2) was damaged.
    Analysis: The analysis of the turbocharged system, said the intercooler plastic cover fragments damaged into the intake pipe, affecting the cylinder pressure.
    Exclude: demolition of the cylinder head found in the intake pipe has broken plastic pieces, these broken plastic sheet caused by closed valve caused by poor cylinder pressure is too low.
    Failure 3 Inlet Seal Leakage Causes serious deficit oil
    Failure: engine serious deficit oil.
    Check: the car driving 15000km to do maintenance when the user reflects the deficit oil, maintenance personnel carefully check the oil leaks did not find the place, observe the exhaust pipe has a slight smoke discharge, so that the missing oil is burned into the combustion chamber The. As the car users rush to the car, we recommend that users often observe the engine oil level oil level. When the vehicle travels to 17500km, it returns to the service station, and the user has indicated that it has added nearly 2L of oil during this period. Maintenance personnel to check, when the removal of the spark plug, the spark plug found a serious coke. Measuring cylinder pressure, 3 cylinder pressure below normal. Remove the cylinder head inspection found that the top of the 3-cylinder piston and the combustion chamber, the valve seat has a lot of coke, when the removal of 3-cylinder into the exhaust valve seal, found one of the intake valve seal Deformation.
    Analysis: As the valve seal deformation, resulting in lax sealing, resulting in burning oil phenomenon.
    Exclude: replace the valve oil seal, increase the throttle when the exhaust pipe does not take blue smoke. Since then the car to track the phone, there is no abnormal oil shortage phenomenon.
    Failure 4 thermostat damage caused by idle instability
    Failure: hot water temperature indicator is too high, idle instability, and high fuel consumption.
    Check: Check that the coolant temperature sensor G62 signal is unreliable. Check the sensor plug, wire no problem, with VAG1426 to measure the wire resistance, are within the allowable range. Replace the coolant temperature sensor G62 after the fault code no longer appears, but the water temperature is still high. Suspected thermostat problems, according to the maintenance manual disassembly thermostat, do the thermostat to open the temperature test, found that the thermostat open gap small.
    Exclude: change the thermostat, hot water temperature after the normal, idle smooth.
    Fault 5 fan motor damage causes water temperature warning light alarm
    Fault: Water temperature warning light alarm.
    Check: After the test found that the left side of the large electric fan does not turn, check the battery on the S164 (40A) fuse blown. Unplug the plug of the large electric fan and measure the resistance of the motor (between terminals 1 and 3) with a multimeter to measure the resistance of the series resistance (between terminals 1 and 1 and 2) is infinite and the resistance of the normal motor Should be 2.5Ω, series resistance should be 1Ω. A careful examination of the leaves found that several fan blades were covered with plastic film.
    Analysis: the cause of the malfunction is the fan blade is plastic film winding, due to the operation of large resistance, the motor running a large load, resulting in series resistance blow, loss of fan low speed, and ultimately make S164 fuse (Figure 3) blow, radiator fan stop Turn, causing the cooling system to high temperature.
    Exclude: Replace the electric fan and S164 fuse, troubleshooting.