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Engine oil > < Oil filter, oil filter bracket - exploded view of components

A3 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 C-

Test conditions
l  Oil level OK
l  Engine oil temperature approx. 80 °C
l  Oil pressure warning lamp -K3- should come on when ignition is switched on.
l  On vehicles with driver information system (DIS), the message “OK” should light up in the display.
   
Preparation for test
–  Remove centre noise insulation -arrows-.
  A02-0063
–  Unplug electrical connector at oil pressure switch -F1--arrow-.
–  Unscrew oil pressure switch.
  A17-0022
–  Connect oil pressure tester -V.A.G 1342- to threaded hole for oil pressure switch.
–  Screw oil pressure switch -2- into oil pressure tester -V.A.G 1342-.
Checking oil pressure switch
–  Connect brown wire -1- of oil pressure tester to earth (–).
–  Connect voltage tester -V.A.G 1527 B- with test leads from auxiliary measuring set -V.A.G 1594 C- to oil pressure switch and battery positive (+).
l  The LED should not light up.
If the LED lights up:
–  Renew oil pressure switch.
–  Start engine.
  Note
Observe tester and LED while starting, as switching point of oil pressure switch may already be exceeded when starting.
l  LED should light up at 1.2 ... 1.6 bar.
If the LED does not light up:
–  Renew oil pressure switch.
Checking oil pressure
–  Start engine (engine oil temperature approx. 80 °C).
l  Minimum oil pressure at idling speed: 1.2 bar.
l  Minimum oil pressure at 2000 rpm: 3.5 bar.
The pressure relief valve or oil pump is defective if the specifications are not attained.
–  Renew the oil pump → Chapter.
  A17-0025

Engine oil > < Oil filter, oil filter bracket - exploded view of components