Volkswagen CJDA, Workshop Manual

Page: 414 / 553

– Check the fuel pump
⇒
Page 314 .
If no fault was detected:
– Check fuel pump relay -J17-
⇒
Page 486 , current flow dia-
grams.
Checking voltage supply
– Connect multimeter to contacts 1 + 3 of connector using test
leads from auxiliary measuring set -V.A.G 1594D- to meas-
ure voltage.
– Switch on ignition. Specification: at least 4.8...5.2 V
– Switch off ignition.
Checking wiring
– Using adapter cable -V.A.G 1598/39-1-, connect test box
-V.A.G 1598/42- to wiring harness of control unit
⇒
Page 24 .
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 53
◆
Contact 1 + socket 40
◆
Contact 3 + socket 25
● 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 + 3:
– Renew fuel pressure sender -G247-.
– Then, read event memory of engine control unit, and clear
event memory if necessary
⇒
Page 26 , read event memory.
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 .
2.4 Checking injectors, cylinders 1...4
-N30...N33-
Special tools and workshop equipment required
◆
Hand multimeter -V.A.G 1526- or multimeter -V.A.G 1715-
◆
Auxiliary measuring set -V.A.G 1594D-
3
Industriemotoren - Industrial Engines 2009
▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
398 Repair Group 23 - Mixture preparation - injection