Volkswagen CJDA Workshop Manual page 406

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
– Connect multimeter to sender contacts 1 + 2 using test leads
from auxiliary measuring set -V.A.G 1594D- to measure re-
sistance. Specification: 2.0...5.0 Ω
If the specification is not attained:
– Renew fuel metering valve -N290-.
– Then, read event memory of engine control unit, and clear
event memory if necessary
If specification is attained:
Checking supply voltage
– Check supply voltage of fuel metering valve -N290- as fol-
lows:
– Connect multimeter to contact 2 of connector and to engine
earth using test leads from auxiliary measuring set
-V.A.G 1594D- to measure voltage.
– Switch on ignition. Specification: at least 11.5 V
– Switch off ignition.
If the specification is not attained:
– Check cable connections for open circuit, short circuit and
transfer resistance at contacts referring to current flow dia-
gram.
If specification is attained:
Checking wiring
– Check wiring of fuel metering valve -N290- as follows:
– 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 60
● 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 fuel metering valve -N290-.
– Then, read event memory of engine control unit, and clear
event memory if necessary
390 Repair Group 23 - Mixture preparation - injection
⇒ P age
26.
⇒ P age
⇒ P age
26, read event memory.
24.