Oil pressure switch, checking

WARNING: This page is about a different car, the 2004 Volkswagen R32. However, it is still accessible from the selected car via links, so may be relevant.

Test conditions

Engine oil level OK, checking Markings on oil dipstick .
Oil pressure warning lamp K3 must light up for approx. 3 seconds when ignition is switched on
Engine oil temperature at least 80 ° C (radiator fan must have run once)

Test sequence

Remove sound insulation pan, along with left and right sides: Refer to 50 BODY, FRONT

Fig 1: Identifying V.A.G 1342 With Adapter V.A.G 1342/14

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove oil pressure switch F1 and screw it into oil pressure gauge V.A.G 1342.
Screw oil pressure gauge V.A.G 1342 with adapter V.A.G 1342/14 into oil filter housing in place of oil pressure switch.

NOTE:

Note installation position of adapter: The conical connecting neck of the adapter is screwed to the pressure hose of the tester.

Connect brown wire of tester to ground (-).
Connect voltage tester V.A.G 1527B using adapter cables from connector test kit V.A.G 1594C to B+ and oil pressure switch. LED must not light up.

If LED lights up:

Replace oil pressure switch F1.

If the LED does not light up:

Start engine and run at idle speed. At 1.2 to 1.6 bar pressure LED must light up; otherwise replace oil pressure switch F1.