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Checking charge pressure control valve vacuum unit > < Checking charge pressure control

Polo Mk3

Checking charge pressure control solenoid valveN75
Checking charge pressure control solenoid valve -N75-
–  Switch off ignition.
   
–  Pull connector -2- off charge pressure control solenoid valve -N75--1-.
–  Measure resistance between valve contacts.
Specification: 25...45 Ω
If the specification is not attained:
–  Renew charge pressure control solenoid valve -N75-.
If the specification is attained:
–  Switch on ignition.
  N21-0136
–  Measure supply voltage at valve connector contact 1 and at engine earth. Specification: approx. battery voltage
If the specification is not attained:
–  Switch off ignition.
  N24-0231
–  Connect adapter cable, 121-pin -V.A.G 1598/31- to control unit wiring harness. The engine control unit remains disconnected.
–  Check wiring between adapter cable, 121-pin -V.A.G 1598/31- and connector for open circuit referring to current flow diagram.
Contact 1 + socket 1 and 2
Contact 2 + socket 62
Wire resistance: max. 1.5 Ω.
–  Also check wiring for short to one another, short to vehicle earth and short to battery positive.
Specification: ∞ Ω.
If no fault in lines is detected:
–  Renew diesel direct injection system control unit -J248- → Chapter.
  N01-0369

Checking charge pressure control valve vacuum unit > < Checking charge pressure control