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Engine cooling > < Checking oil pressure and oil pressure switch (single pin oil pressure switch)

Golf Mk5

Checking oil pressure and oil pressure switch (2-pin oil pressure switch)
Checking oil pressure and oil pressure switch (2-pin oil pressure switch)
  Note
Single pin and 2-pin oil pressure switches have been installed. Check which type of oil pressure switch has been installed. Checking oil pressure and oil pressure switch (1-pin oil pressure switch) → Chapter.
Special tools and workshop equipment required
   
t  Oil pressure tester -V.A.G 1342-
  W00-0516
t  Test instrument adapter/DSO (2-pin) -VAS 5256-
  W00-10171
t  Hand-held multimeter -V.A.G 1526D-
l  Engine oil level OK.
l  Engine oil temperature at least 80 °C (radiator fan must have run once)
  Note
Functional check and repair of the optical and acoustic oil pressure display: Current flow diagrams → Vehicle diagnostic tester.
  W00-10706
–  Remove oil pressure switch -F1- → Chapter and screw it into tester.
–  Screw tester into oil filter bracket in place of oil pressure switch.
–  Connect test instrument/DSO adapter (2-pin) -VAS 5256- to oil pressure switch
–  Connect Multimeter -V.A.G 1526D- to test instrument/DSO adapter (2-pin) -VAS 5256- and check for continuity.
l  Oil pressure switch must be open below 1.2 bar.
–  Start engine and increase engine speed. At 1.2…1.6.bar, the oil pressure switch must close, otherwise renew oil pressure switch.
–  Increase engine speed further. At 2000 rpm and an oil temperature of 80 °C the oil pressure should be between 2.7…4.5 bar.
At higher engine speeds, the oil pressure must not exceed 7.0 bar.
If specification is not attained:
–  Check strainer in oil suction pipe for contamination/soiling → Item.
  Note
Mechanical damage, e.g. to bearings, could also be the cause for oil pressure being too low.
If no fault is found:
–  Renew oil pump and balancer shaft gear assembly → Chapter.
If the specification is exceeded:
–  Check oil channels.
–  If necessary, renew oil filter bracket with pressure relief valve.
  N17-10226

Engine cooling > < Checking oil pressure and oil pressure switch (single pin oil pressure switch)