Volkswagen CJDA Workshop Manual page 430

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
– Connect multimeter to following connector contacts and en-
gine earth using test leads from -V.A.G 1594-.
◆ Contact 4 + engine earth
● Specification: at least 11.5 V
– Switch off ignition.
If the specification is not attained:
– Check wiring of air mass meter as follows:
– Using adapter cable -V.A.G 1598/39-2-, connect test box
-V.A.G 1598/42- to wiring harness of control unit
The engine control unit is not connected by this action.
– Check wiring between test box and connector for open cir-
cuit referring to current flow diagram.
◆ Contact 1 + socket 18
◆ Contact 2 + socket 23
◆ Contact 4 + socket 39
● Cable resistance: max. 2.0 Ω.
– Check wiring between contact 4 of 4-pin connector and fuse
referring to current flow diagram
– Also check wiring for short to one another, short to battery
earth/engine earth and short to battery positive. Specifica-
tion: ∞ Ω
If no fault in lines is detected:
– Renew air mass meter.
2.11 Checking throttle valve module -J338-
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
● Throttle valve module not soiled.
● Engine running at idling speed
Test procedure
414
Repair Group 23 - Mixture preparation - injection
⇒ P age
⇒ P age
486.
24.