VW CGRA - Page 211

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– Regulate the pressure to 35 mbar with valve -A-. When the
pressure has stabilised, it must not drop below 30 mbar after
5 minutes.
If no pressure builds up or the pressure is not held for at least 5
minutes, localise leak as follows:
– Perform visual check on all components and hoses of the fuel
system.
Note
Also check fuel tank cap for leaks.
Only if no fault has yet been detected:
– Check breather line and activated charcoal filter for leaks. To
do this, remove breather line -1- from activated charcoal filter
and seal connection with a plug.
– Repeat pressure test.
If pressure still drops, the leakage can be found on the activated
charcoal filter or breather line:
– When valve -A- is open, check the following lines and compo‐
nents for leaks by listening, touching, with commercially avail‐
able leak detector spray or ultrasonic tester - V.A.G 1842- .
♦ Line from engine compartment to activated charcoal filter.
♦ Activated charcoal filter
If the pressure does not drop again, the leakage can be found on
fuel tank:
– To do this, reconnect breather line on activated charcoal filter.
– When valve -A- is open, check fuel tank for leaks by listening,
touching, with commercially available leak detector spray or
ultrasonic tester - V.A.G 1842- .
Caution
After completing work check tyre pressure!
Touareg 2010 ➤ , Touareg 2015 ➤
6-cylinder direct-injection engine (3.6 l engine, 4V) - Edition 12.2019
5. Activated charcoal filter system 205