Audi Workshop Service and Repair Manuals > A4 Mk3 > Power unit | 4-cylinder TDI engine (2.0 ltr. 4-valve common rail - generation II), mechanics | Engine lubrication | Oil filter bracket, engine oil cooler and oil supply line

Checking oil pressure switchF1

Checking oil pressure switch -F1-

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-

Procedure

l	Oil level OK

l	Engine oil temperature approx. 80 °C.

–	Remove oil pressure switch -F1- → Chapter.

–	Connect oil pressure tester -V.A.G 1342- to bore for oil pressure switch.

–	Screw oil pressure switch -F1--item 2- into threaded hole in oil pressure tester.

–	Connect brown wire -1- of oil pressure tester to earth (–).

–	Connect voltage tester -V.A.G 1527B- with adapter leads from auxiliary measuring set -V.A.G 1594C- to oil pressure switch -F1- and battery positive (+).

l	LED should not light up.

Note

Renew oil pressure switch -F1- if LED lights up at this stage.

Note

Observe oil pressure tester and LED while starting engine, as switching point of oil pressure switch may already be exceeded when starting.

l	LED should light up at 0.3 ... 0.6 bar.

–	Renew oil pressure switch -F1- if LED does not light up.

Audi Workshop Service and Repair Manuals