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Yeti

Testing oil pressure and oil pressure switch
Testing oil pressure and oil pressure switch
Special tools and workshop equipment required
t  Flexible-head wrench SW 24 -T40175 -
t  Oil pressure tester, e.g. -V.A.G 1342-
t  Voltage tester, e. g. -V.A.G 1527 B-
t  Measuring tool set, e.g. -V.A.G 1594 C-
t  Vehicle Diagnosis, Measurement and Information System -VAS 505X-
Conditions
l  Engine oil level o.k., test → BookletYeti.
l  Coolant temperature at least 80°C (radiator fan must have run at least once)
  Note
Functional test and repair of the visual and acoustic oil pressure display → Current flow diagrams, Electrical fault finding and Fitting locations, → Vehicle diagnostic, testing and information system VAS 5051.
Test sequence
   
–  Remove the oil pressure switch in the left cylinder head -arrow- with the flexible-head wrench, wrench size 24 -T40175 -.
  A17-10341
–  Screw oil pressure switch into the test equipment.
–  Screw tester in the cylinder head instead of the oil pressure switch.
–  Connect brown cable of tester to earth (-).
–  Connect voltage tester to battery positive and to oil pressure switch.
l  The LED must not light up.
If the LED lights up:
–  Replace oil pressure switch - F1-.
If the LED does not light up:
–  Start engine and increase engine speed.
l  The LED must light up at 0.03…0.07 MPa (0.3...0.7 bar) oil overpressure, if not replace oil pressure switch.
–  Increase engine speed further.
l  At 2000 rpm and an oil temperature of 80 °C the oil overpressure should be at least 0.2 MPa (2.0 bar).
l  At higher speed the oil overpressure must not exceed 0.7 MPa (7 bar).
  S17-0115

Engine cooling > < Valve gear