Volkswagen CJDA, Workshop Manual

Page: 410 / 553

2.3 Checking fuel pressure sender -G247-
Special tools and workshop equipment required
◆
K-Jetronic pressure tester -V.A.G 1318-
◆
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.
● Coolant temperature at least 80°C
● The battery voltage must be at least 11.5 V.
● All electrical consumers must be switched off.
● Earth connections OK
Test procedure
– Note safety precautions before beginning work
⇒
Page 299 .
– Observe rules for cleanliness
⇒
Page 300 .
– Start engine.
If engine does not start:
– Check fuel pressure while starting
⇒
Page 395 .
If engine starts:
– Allow engine to idle.
– Connect vehicle diagnostic tester, and select engine control
unit.
⇒
Page 23
– Select diagnosis function “011-Read measured value block”.
– Select “Display group 7”.
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.
– Observe display zone 4. For the check below, the coolant
temperature must be at least 80°C.
– Check fuel rail pressure as follows:
– Select “Display group 20”.
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.
Display group 7
xxx.x°C xxx.x°C xxx.x°C 87.3°C
Display group 20
880 rpm xxxx bar xxxx bar xxx.x%
3
Industriemotoren - Industrial Engines 2009
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Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
394 Repair Group 23 - Mixture preparation - injection