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Engine oil > < Removing and installing oil filter bracket with oil cooler

A4 Cabriolet Mk2

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 1527B-
t  Auxiliary measuring set -V.A.G 1594C-

Test conditions
l  Oil level OK
l  Engine oil temperature approx. 80 °C
   
Preparation for test
–  Pull off engine cover panel -arrows-.
  A10-10294
–  Unbolt coolant expansion tank -arrow-.
–  Unplug electrical connector for coolant shortage indicator switch -F66- at expansion tank (bottom) and move expansion tank to one side (coolant hoses -1 ... 3- remain attached).
  A10-0989
–  Unplug electrical connector -arrow- at oil pressure switch -F1-.
–  Place a cloth under oil pressure switch -F1-.
–  Unscrew oil pressure switch -F1-.
  A17-0347
–  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 1594C- to oil pressure switch and battery positive (+).
l  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 0.55 ... 0.85 bar.
If LED does not light up:
–  Renew oil pressure switch.
Checking oil pressure
–  Start engine.
l  Minimum oil pressure at idling speed: 0.8 bar
l  Minimum oil pressure at 2000 rpm: 2.0 bar.
  A17-0025

Engine oil > < Removing and installing oil filter bracket with oil cooler