Volkswagen CC 2012 Workshop Manual page 82

CC 2012 ➤ , Passat 2011 ➤ , Passat Variant 2011 ➤
Fuel supply system, petrol engines - Edition 05.2019
– Connect pressure tester - VAS 6550- to fuel supply line using
hose - VAS 6550/1- and -VAS 6550/2- .
CAUTION
Risk of fire due to escaping fuel.
Risk of severe injuries and burns.
– Before testing, check all connected lines for secure fit by
pulling.
– Take any fuel-soaked cloths away from area of vehicle.
– Ensure that drain tap -C- on pressure tester -1- is closed.
– Shut-off valves -A- and -B- on pressure tester -1- are open.
– Connect vehicle diagnostic tester.
– Activate fuel pump with final control diagnosis under "Engine
electronics".
Note
The fuel pump is now actuated to build up fuel pressure.
♦
If the final control diagnosis is carried out several times in suc‐
♦
cession, it may be necessary to start the engine briefly before
repeating the final control diagnosis.
– Read off fuel pressure on pressure gauge.
• Specification: approx. 4.0 ... 7.0 bar
If fuel pressure is OK, check holding pressure
⇒ "8.1.4 Checking holding pressure", page 84
If the specification is exceeded:
– Pressure limiting valve in fuel delivery unit flange is defective.
Note
Pressure limiting valve and fuel filter are integrated in flange of
fuel delivery unit and cannot be renewed individually.
– Renew flange with fuel filter
If specification is not obtained
Proceed as follows to check fuel pressure at fuel delivery unit:
– Remove bench seat ⇒ General body repairs, interior; Rep. gr.
72 ; Rear seats; Removing and installing bench seat/individual
seats .
– Guide carpet out and fold upwards, if fitted.
78
Rep. gr.20 - Fuel supply system
.
⇒ "4 Fuel filter", page 55 .