3.4 Checking position sender for charge
pressure positioner -G581-
Special tools and workshop equipment required
◆ Hand multimeter -V.A.G 1526- or multimeter -V.A.G 1715-
◆ Auxiliary measuring set -V.A.G 1594D-
◆ Test box -V.A.G 1598/42- with adapter cable
-V.A.G 1598/39-1-
◆ Current flow diagram
Test prerequisites
● Fuses must be OK.
● The battery voltage must be at least 11.5 V.
● All electrical consumers must be switched off.
● Earth connections OK
● Vacuum hoses OK
● Coolant temperature must be at least 80°C, ⇒ display group
1, display zone 4.
Test procedure
– Connect vehicle diagnostic tester, and select engine control
unit. ⇒ Page 23
– Select diagnosis function “015-Access permissions”.
– Carry out final control diagnosis, and activate charge pres-
sure control solenoid valve -N75- ⇒ Page 89, final control di-
agnosis.
The displays in display zones 2, 3 and 4 must fluctuate within
following control range:
Note
The display zones may be shown one below the other or next to
each other on the display of the vehicle diagnostic tester.
Display zone 2 OFF:
● Specification in display zone 3: 900…1150 mbar
● Specification in display zone 4: 90…100%
Display zone 2 ON:
● Specification in display zone 3: 100 mbar higher than with
display OFF
● Specification in display zone 4: 95%
● Specification in display zone 3: charge pressure difference
between “OFF” and “ON” must be at least 100 mbar
– Exit diagnosis function.
– Switch off ignition.
If the specifications are not attained, display zone 4 always
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Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
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3 Checking components and functions
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