Volkswagen CJDA Workshop Manual page 455

– Connect multimeter to following connector contacts and en-
gine earth using test leads from -V.A.G 1594-.
◆ Contact 1 + engine earth
◆ Contact 1 + contact 3
● Specification: at least 4.8... 5.2 V
– Switch off ignition.
– Using adapter cable -V.A.G 1598/39-1-, 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 25
◆ Contact 2 + socket 19
◆ Contact 3 + socket 53
◆ Contact 5 + socket 57
◆ Contact 6 + socket 4
● Cable resistance: max. 2.0 Ω.
– Also check wiring for short to one another, short to battery
earth/engine earth and short to battery positive. Specifica-
tion: ∞ Ω
If no wiring fault is detected and voltage was present between
contacts 1 + engine earth and contacts 1 + 5:
– Renew exhaust gas recirculation valve -N18- with exhaust
gas recirculation potentiometer -G212-.
– Adapt exhaust gas recirculation valve -N18-
– Then, read event memory of engine control unit, and clear
event memory if necessary
If no wiring fault is detected and no voltage was present be-
tween contacts 1 + engine earth and contacts 1 + 3:
– Pull connectors off any components which are connected to
this voltage supply line
– 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-
3.3 Checking Lambda probe -G39-
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-
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
⇒ P age
⇒ P age
26, read event memory.
⇒ P age
486, current flow diagrams.
⇒ P age
418.
Industriemotoren - Industrial Engines 2009 ▶
⇒ P age
24.
423.
3 Checking components and functions
3
439