5 Series E39 523i (M52) TOUR
16 00 100
Checking fuel tank and tank ventilation
system for leak-tightness
If a leak in the tank ventilation system is indicated by the
"Check engine" indicator lamp in the instrument cluster
lighting up, a leak test must be carried out.
First the fault memory of the DME control unit must be read
out and a diagnosis conducted. If the sensors are OK, then
begin the leak test.
The following conditions must be observed to obtain plausible
measuring results:
-
Contents of fuel tank: 50%
±
25%
-
Park the vehicle in the workshop at least 2 hours before the
test so that the fuel temperature is approximately that of the
workshop temperature (ideal fuel temperature approx. 10-20
°
C).
-
Never refuel the vehicle directly prior to the leak test due to
the strong emission of gas by the fresh fuel.
Removing rear left wheel,
refer to 36 10 300
Remove left rear wheel housing trim.
Remove air cleaner (2) of leak diagnosis pump from retaining
bracket of activated carbon filter from below and seal with special
tool 16 1 161.
Use hose clamp (1).
RA Checking fuel tank and tank ventilation system for leak-tightness
BMW AG - TIS
12.02.2013 14:14
Issue status (12/2007) Valid only until next DVD is issued
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