Volkswagen CJDA Workshop Manual page 458

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
– Connect multimeter to connector contact 4 and engine earth
using test leads from -V.A.G 1594- to measure voltage.
– Switch on ignition. Specification: at least 11.5 V
– Switch off ignition.
If the specification is not attained:
– Check terminal 30 voltage supply relay -J317-
current flow diagrams.
– Check cable connections for open circuit, short circuit and
transfer resistance at contacts referring to current flow dia-
gram.
If specification is attained:
– Check wiring of lambda probe heater 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 3 + socket 73
● Cable resistance: max. 2.0 Ω.
– Additionally check wires for short to one another. Specifica-
tion: ∞ Ω
If no wiring fault is detected and voltage supply is OK:
– Renew engine control unit -J623-
3.5 Checking exhaust gas temperature
sender 3 -G495- (exhaust gas tempera-
ture sender ahead of diesel particulate
filter)
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 1598/39-2-
◆ 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
442
Repair Group 26 - Exhaust system
⇒ P age
486,
⇒ P age
⇒ P age
418.
24.