Volkswagen CJDA, Workshop Manual

Page: 355 / 553

– Pull vacuum hose -arrow- off connection piece of vacuum
pump.
– Connect hand vacuum pump -VAS 6213- to disconnected
hose and generate a vacuum of 0.6 bar.
– Observe pressure gauge of hand vacuum pump -VAS 6213-
for approx. 30 seconds.
● Vacuum must not drop.
If vacuum drops:
– Locate damage or leak in hose and replace corresponding
length of hose.
If pressure does not drop:
– First, pull hose off hose on hand vacuum pump -VAS 6213-.
– Remove sealing plugs from hose ends.
– If the non-return valve is functional, a clear hiss is audible
when vacuum in vacuum reservoir is released.
If no hiss is audible:
– Renew non-return valve.
If a hiss is audible:
– Reconnect all disconnected vacuum hoses.
– Check control line to turbocharger
⇒
Page 339 .
2.4.2 Checking control line to turbocharger, en-
gine codes CJDA, CJDD, CPYA, CPYB,
CPYC, CPYD, CPYE
– Pull off vacuum hose on connecting piece of charge pres-
sure control solenoid valve -N75- -1- and vacuum unit of tur-
bocharger
⇒
Page 334 .
– Seal one opening of hose with a suitable sealing plug.
Note
Do not use screws or threaded bolts.
– Connect hand vacuum pump -VAS 6213- to other end of
hose and generate a vacuum of 0.6 bar.
– Observe pressure gauge of hand vacuum pump -VAS 6213-
for approx. 30 seconds.
● Vacuum must not drop.
If vacuum drops:
– Renew vacuum hose.
– Reconnect all disconnected vacuum hoses.
If pressure does not drop:
– Reconnect all disconnected vacuum hoses.
Industriemotoren - Industrial Engines 2009
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Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
3
2 Checking charge air system 339