Volkswagen CJDA Workshop Manual page 463

◆ 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
● The control lines between exhaust gas pressure sensor 1
and diesel particulate filter must not be clogged or damaged.
Check them accordingly
diesel particulate filter.
Test procedure
Note
Only gold-plated contacts may be used when repairing the con-
tacts in the connectors of the exhaust gas pressure sensor 1.
– Connect vehicle diagnostic tester, and select engine control
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unit.
– Select diagnosis function "011-Read measured value block".
The engine must be running at idling speed.
– Select "Display group 100".
Indicated on display:
Note
The display zones may be shown one below the other or next to
each other on the display of the vehicle diagnostic tester.
– Check differential exhaust gas pressure in display zone 3.
– Increase engine speed to 2500...2800 rpm.
– Check differential exhaust gas pressure (actual) in display
zone 3. The differential exhaust gas pressure should in-
crease significantly.
– Exit diagnosis function.
– Switch off ignition.
If the differential exhaust gas pressure (actual) in display zone 3
is constantly at 0 mbar:
– Check diesel particulate filter for cracks .
If the differential exhaust gas pressure (actual) in display zone 3
is not constantly at 0 mbar and the specifications are not at-
tained:
Check voltage supply
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
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427, Assembly overview -
Industriemotoren - Industrial Engines 2009 ▶
Display group 100
xxx.x°C xxx.x°C
3 Checking components and functions
3
4.20 mbar x.xx mbar
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