Volkswagen CJDA Workshop Manual page 358

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Note
◆ If the engine is idling or OFF, the activation of the valve can
also be checked by touching it.
◆ During activation with the engine idling, the linkage of the
charge pressure control vacuum unit on the turbocharger
must move back and forth.
– Proceed with final control diagnosis until completed.
– Exit diagnosis function.
– Switch off ignition.
If the valve is not activated:
– Pull 2-pin connector off charge pressure control solenoid
valve -N75-.
Checking resistance
– Connect multimeter to valve contacts using test leads from
-V.A.G 1594D- to measure resistance. Specification:
14.0...20.0 Ω
Note
At room temperature the resistance is in the lower tolerance
range, and at operating temperature in the upper tolerance
range.
If the specification is not attained:
– Renew charge pressure control solenoid valve -N75-.
– Then, read event memory of engine control unit, and clear
event memory if necessary
If specification is attained:
Checking voltage supply
– Connect multimeter to connector contact 1 and engine earth
using test leads from -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 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 charge pressure control solenoid valve 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.
342 Repair Group 21 - Turbocharging/supercharging
⇒ P age
26, read event memory.
⇒ P age
⇒ P age
486,
24.