Acura 2010 ZDX Owner's Manual page 460

Service Station Procedures
FUEL FILL CAP
HOLDER TETHER
4. Remove the fuel fill cap slowly. You
may hear a hissing sound as
pressure inside the tank equalizes.
Place the cap in the holder on the
fuel fill door.
5. Stop filling the tank after the fuel
nozzle automatically clicks off. Do
not try to ''top off'' the tank. Leave
some room for the fuel to expand
with temperature changes.
456
If the fuel nozzle keeps clicking off
even though the tank is not full, there
may be a problem with your vehicle's
fuel vapor recovery system. The
system helps keep fuel vapor from
going into the atmosphere. Try filling
at another pump. If this does not fix the
problem, consult your dealer.
6. Screw the fuel fill cap back on until it
clicks at least once. If you do not
properly tighten the cap, you will see
a ''TIGHTEN FUEL CAP'' message
on the multi-information display (see
right column on this page), and the
malfunction indicator lamp may also
come on (see page 593).
7. Push the fuel fill door closed until it
latches.
2010 ZDX
Tighten Fuel Cap Message
Your vehicle's on board diagnostic
system will detect a loose or missing
fuel fill cap as an evaporative system
leak. The first time a leak is detected
a ''TIGHTEN FUEL CAP'' message
appears on the multi-information
display. Turn the engine off, and
confirm the fuel fill cap is installed. If
it is, loosen it, then retighten it until
it clicks at least once.