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Engine cooling > < Removing and installing oil supply line to turbocharger

Leon Mk1

Checking oil pressure and oil pressure switch
   
Checking oil pressure and oil pressure switch
Special tools and workshop equipment required
t  Oil pressure tester -V.A.G 1342-
t  Voltage tester -V.A.G 1527/B-
t  Auxiliary measuring set -V.A.G 1594/A-

Test prerequisites
l  Engine oil level OK, checking → Chapter.
l  Engine oil temperature at least 80 °C (radiator fan must have run once).
  Note
Functional check and repair of the visual and acoustic oil pressure warning: → Current flow diagrams, Electrical fault finding and Fitting locations.
Test procedure
   
–  Remove 0.7 bar oil pressure switch -F1- -brown insulation- and screw into tester.
–  Screw tester into oil filter bracket in place of the oil pressure switch.
–  Connect brown wire of tester to earth (-).
–  Connect diode test lamp -V.A.G 1527 B- to battery positive (+) and oil pressure switch using cables from auxiliary test set -V.A.G 1594/A-. LED must not light up.
–  Start engine and increase speed slowly. The LED must light up at 0.55...0.85 bar, otherwise renew oil pressure switch.
  Note
Observe tester and LED while starting, as switching point of oil pressure switch may already be exceeded when starting.
Checking oil pressure
–  Increase engine speed further. At 2000 rpm and an oil temperature of 80 °C the oil pressure should be at least 2.0 bar.
At higher engine speed, oil pressure must not exceed 7.0 bar. If necessary renew oil filter bracket.
  V17-0540

Engine cooling > < Removing and installing oil supply line to turbocharger