volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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Checking needle lift sender G80 > < Checking modulating piston movement sender G149

Golf Mk4

Checking metering adjusterN146
Checking metering adjuster -N146-
–  Press → button.
–  Press buttons 0 and 6 for function “End data transfer” and confirm entry with Q button.
–  Switch off ignition.
   
–  Disconnect 10-pin connector for injection pump → Chapter.
–  Measure resistance between connector contacts 5+6.
Specification: 0.5…2.5 Ω
If the specification is not achieved:
–  Renew injection pump → Chapter.
If the specification is attained:
  A23-0027
–  Connect adapter cable, 121-pin -V.A.G 1598/31- to control unit wiring harness.
  N24-0943
–  Check wiring between adapter cable, 121-pin -V.A.G 1598/31- and connector for open circuit referring to current flow diagram.
Contact 5+ sockets 1 and 2 Contact 6+ sockets 121 and 116 Line 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
  A23-0028

Checking needle lift sender G80 > < Checking modulating piston movement sender G149