CC 2010 ➤ , Eos 2006 ➤ , Golf 2004 ➤ , Golf 2009 ➤ , Passat 2006 ➤ , ...
4-cyl. injection engine (1.8 and 2.0 l engine, chain drive) - Edition 08.2018
– Switch on tester - VAS 6394/1- to do this, press button -A- once
briefly.
Note
♦ When button -A- is pressed for 2 seconds, the illumination will
be switched on for 20 seconds.
♦ If the digital pressure gauge - VAS 6394/1- reading is not 0
bar, perform zero calibration procedure ⇒ operating instruc‐
tions .
– Connect vehicle diagnostic tester to diagnostic connection.
– Switch ignition on.
– Press following buttons on display of diagnostic tester one af‐
ter the other:
Vehicle self-diagnosis
Self-diagnosis ►
01 - Engine electronics ►
011 - Measured values ►
– Select measured value block 1 4 0 and confirm with Q.
The actual fuel pressure value is shown in display zone 3, meas‐
ured by the fuel pressure sender - G247- .
– Start engine.
– Compare the displayed pressure of pressure tester - VAS
6394/1- with the displayed actual value on vehicle diagnostic
tester .
•
A maximum pressure deviation of 5 bar is permissible.
– If the deviation is greater than 5 bar, renew fuel pressure
sender - G247- .
WARNING
The fuel system is pressurised.
Danger of injury caused by fuel spray.
♦ Wear protective goggles.
♦ Wear protective gloves.
♦ To release pressure, wrap a clean cloth around the con‐
nection and carefully loosen the connection.
– Repeat the test with the new fuel pressure sender - G247- and
compare both measured values.
If measured values again fail to correspond:
– Check wiring ⇒ Vehicle diagnostic tester.
3.2
Checking intake manifold change-over
Perform check only if there is a loss of torque. This means when
there is a lack of elasticity or a lack of pulling power.
Special tools and workshop equipment required
496
Rep. gr.24 - Mixture preparation - injection
CC 2010 ➤ , Eos 2006 ➤ , Golf 2004 ➤ , Golf 2009 ➤ , Passat 2006 ➤ , ...
4-cyl. injection engine (1.8 and 2.0 l engine, chain drive) - Edition 08.2018
♦ Hand operated vacuum pump - VAS 6213-
Prerequisites for check
♦ The variable intake manifold valve - N316- was checked with
a vehicle diagnostic tester .
If the intake manifold flap valve - N316- is OK, perform the fol‐
lowing tests:
– Pull engine cover panel off carefully.
– Start engine and run it at idling speed.
– Have second person abruptly increase engine speed (throttle
burst). Observe vacuum unit for intake manifold change-over.
•
The actuator must move -arrow-
If changeover does not operate as indicated:
– Check vacuum system for leaks.
– Check mechanical change-over components for ease of
movement. To do this, operate rods by hand.
– Check that vacuum lines are connected correctly.
– Check vacuum hoses for porosity.
– Remove vacuum hose -1- leading to actuator for intake mani‐
fold flap valve - N316- from intake manifold flap valve - N316-
-2-.
3. Checking components
497
CC 2010 ➤ , Eos 2006 ➤ , Golf 2004 ➤ , Golf 2009 ➤ , Passat 2006 ➤ , ...
4-cyl. injection engine (1.8 and 2.0 l engine, chain drive) - Edition 08.2018
– Move slide ring -1- on hand vacuum pump - VAS 6213- to po‐
sition -A- for “vacuum”.
– Connect hand vacuum pump - VAS 6213- to actuator for intake
manifold flap valve - N316- .
– Operate hand vacuum pump - VAS 6213- repeatedly.
The vacuum actuator must move -arrows-.
– If the vacuum actuator does not move, replace it.
498
Rep. gr.24 - Mixture preparation - injection
2024 VW Passat Owner's Manual
VW Passat B7 Service & Repair Manual
VW Passat B6 Service & Repair Manual
