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Checking oil pressure and oil pressure switch (2-pin oil pressure switch) > < Removing and installing oil pressure switchF1

A3 Mk2

Checking oil pressure and oil pressure switch (1-pin oil pressure switch)
Checking oil pressure and oil pressure switch (1-pin oil pressure switch)
  Note
Check which oil pressure switch version is installed (1-pin or 2-pin oil pressure switch). Checking oil pressure and oil pressure switch (2-pin oil pressure switch) → Chapter
   
Special tools and workshop equipment required
t  Oil pressure tester -V.A.G 1342-
t  0
t  Voltage tester -V.A.G 1527 B-
t  Auxiliary measuring set -V.A.G 1594C-

l  Engine oil level OK
l  Engine oil temperature at least 80°C (radiator fan must have run once)
  Note
Functional check and servicing the visual and acoustic oil pressure warning: Current flow diagrams, → Vehicle diagnostic tester.
–  Remove oil pressure switch -F1- → Chapter.
   
–  Screw oil pressure tester -V.A.G 1342- into bore for oil pressure switch in oil filter bracket.
–  Connect brown wire of tester to earth (–).
–  Connect voltage tester -V.A.G 1527 B- to battery positive (+) and oil pressure switch with adapter cable from auxiliary measuring set -V.A.G 1594C-. LED must not light up.
–  If the LED lights up, renew oil pressure switch -F1- (1.4 bar).
If the LED does not light up:
–  Start engine and run at increased speed: At a pressure of 1.2 ... 1.6 bar the LED should light up; otherwise oil pressure switch must be renewed.
–  Increase engine speed further. At 2,000 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.
  V17-0540

Checking oil pressure and oil pressure switch (2-pin oil pressure switch) > < Removing and installing oil pressure switchF1