Volkswagen CJDA, Workshop Manual

Page: 429 / 553

– Connect multimeter to following connector contacts and en-
gine earth using test leads from -V.A.G 1594-.
◆
Contact 5 + 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
⇒
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 18
◆
Contact 2 + socket 23
◆
Contact 4 + socket 39
◆
Contact 5 + socket 87
● Cable resistance: max. 2.0 Ω.
– Check wiring between contact 5 of 5-pin connector and fuse
referring to current flow diagram
⇒
Page 486 .
– 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.
Checking voltage supply, engine codes CPYA, CPYB,
CPYC, CPYD, CPYE
– Pull 4-pin connector -6- off air mass meter -G70-.
– Switch on ignition.
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 413