Volkswagen CJDA, Workshop Manual

Page: 423 / 553

If no wiring fault is detected and voltage was present between
contacts 1 + 3:
– Renew intake air temperature sender -G42- together
with charge pressure sender -G31-.
If no wiring fault is detected and no voltage was present be-
tween contacts 1 + 3:
– Pull connectors off any components which are connected to
this voltage supply line
⇒
Page 486 , current flow diagrams.
– Check voltage supply and wires on these components.
If no wiring fault is detected and no voltage was present on
these components:
– Renew engine control unit -J623-
⇒
Page 418 .
2.8 Checking coolant temperature sender
-G62-
Special tools and workshop equipment required
◆
Hand multimeter -V.A.G 1526- or multimeter -V.A.G 1715-
◆
Auxiliary measuring set -V.A.G 1594-
◆
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
● Engine must be cold.
Test procedure
Note
Only gold-plated contacts may be used when repairing the con-
tacts in the connectors of the coolant temperature sender.
– Connect vehicle diagnostic tester, and select engine control
unit.
⇒
Page 23
– Select diagnosis function “011-Read measured value block”.
Engine must be idling.
– 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.
Display group 7
xxx.x°C xxx.x°C
xxx.x°C 16.7°C
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 components and functions 407