A ten year old VW Touran 2.0 TDI does not create the TÜV the exhaust-emission check. A workshop can not remedy the deficiency – is used to a mysterious software. VW has tricked even with older diesel cars
Moving from Switzerland to Dusseldorf – but the car is with. So did in August 2015, the owner of a VW Touran 2.0 TDI, built in 2005, good ummelden his car. For this you need a current HU-certificate. HU stands for general inspection, colloquially TUV
No problem. The Touran has got more than 100,000 kilometers usage, but is in good shape. The TÜV in Dusseldorf criticizes only the lack of first-aid kit. The is bought quickly, so forth with the badge
Too much soot in the exhaust
But the inspector shakes after also mandatory exhaust-emission check (AU) upside down. There’s something wrong the tailpipe. Namely, with smoke opacity. It is much too high, is more than twice over the limit (see info box).
The fact that the high smoke opacity noticed at all, is the age of the VW vans. For new cars namely only the fault memory of the car read (onboard diagnostics, OBD abbreviated). The case of the ten year old Touran nothing indicated. If a car but before 1.1. Approved in 2006 for the first time, TÜV, Dekra or GTÜ need right on the exhaust measure , regardless of the information provided in the fault memory.
- smoke opacity and nitrogen oxides
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The smoke opacity is an indication of the particle content in the diesel exhaust. The nitrogen oxide emissions (NOx) and the amount of particulates (soot) are related, the exhaust experts called “soot-NOx scissors” . These scissors can be influenced by the motor control: When the setting is selected so that fewer nitrogen oxides are formed, at the same time increases the emission of soot particles. What’s good for the NOx levels, so is bad for the soot values and vice versa.
Too much soot in the tailpipe can then, for example, occur when a vehicle before checking for a long time was moving in city traffic. In the exhaust-emission check (AU) Although the smoke opacity is measured on the dynamometer, but not the nitrogen oxide emissions. A change in the smoke opacity could through the influence of soot-NOx scissors but indicate indirectly that has intervened in the engine control.
What happened in the workshop?
The TÜV-protocols, the FOCUS Online are present, have the “arithmetic mean of turbidity” value to 2.18. 1.0 there should be a maximum. “Our client was ordered to fix the defect of the vehicle at a car dealership, so that the legal limit is reached,” says Tobias Ulbrich from the Registry Rogert & amp; Ulbrich from Dusseldorf. The lawyer specializing in transportation and forwarding law is the lawyer of the Touran driver who his lawyer does not want to drive a car, which in reality more pollutants discharges as put to the test. Because what happened in the workshop, raises some questions.
A VW dealership checked the exhaust system and undertook the necessary technical changes. “Thereupon, our client went again to TÜV to certify that now the smoke opacity values are within the legal limits. The review found that once an allowance of 1.62 was higher than the legal limit 1.0, “says lawyer Tobias Ulbrich. Again there was no plaque
a software update for Saubermann
The second workshop visit happened then what can puzzle the Touran driver and his lawyer. “Technical changes were on the vehicle ceases. There is a new software has been loaded onto the controller still only. And suddenly was calculated from the measured 1.62 in smoke opacity value a value of 0.43 “said Ulbrich. The joyous news of the TÜV to the Touran driver after the re-presentation of the car: “on your vehicle were no defects found.”
So sent by software Update the engine management system changed so that the car emits at least put to the test less soot? One in return possibly increased NOx emission would not be noticed in the emissions testing because the NOx is not measured at the AU.
suspicion: special software made the vehicle clean
Lawyer Ulbrich cherishes following suspicions: “In connection with the VW-exhaust scandal seems likely, conscious that here too the manufacturer’s malware has been used to achieve the emission target of the old VW Touran. As a result, this would mean that each old vehicle which is not affected by the recall, could be transformed into a clean ‘vehicle when only one new software is loaded, “said the lawyer
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“If it was indeed acting in the software to the control software of the VW Group, suggested the opinion of our clients rectification the plant capacity will fail and the vehicle is actually further provided with the lack of insufficient turbidity values, “says Ulbrich.
The lawyer goes even one step further. There was “at least the initial suspicion”, that VW car dealerships might have known about the specific use of tax software communication. Until now,
“Software updates only from the work” goes into the exhaust-crisis assuming that relatively few people knew within the Volkswagen development department of the test detection trick on the engine control unit.
When VW Touran 2.0 TDI Year 2005 an old pump-nozzle turbo diesel is used, thus a completely different type of engine as the affected from the current VW scandal. The dealership, in which the Touran from Dusseldorf was in the workshop, wanted to request of FOCUS Online not comment on the case – neither on the modifications to the vehicle engineering changes yet to the enigmatic software update. You can rely “only on the statements of the manufacturer” itself. FOCUS Online also has VW asked to comment. The answer is still pending.
The question remains how the workshop had the software. “The workshops can not easily access software updates so”, says the expert workshop of a magazine compared to FOCUS Online. Also, the specialized on diesel vehicles Chip Tuner Dietmar Domröse from Munich does not believe that VW dealers have knowingly used such software. “The dealer must inquire each software update at the factory and replaced by this only for the queried vehicle,” said Domröse.
Must be more tested again?
The tailpipe measurement is the way for the will of the automotive trade are maintained as an integral part of the exhaust-emission check. The AU must not “be left to self-monitoring systems in the vehicles,” reads the requirement of the central association ZDK. The crux of the matter: For motorists would tailpipe emission test then expensive
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