Checking oil pressure switch

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, 2003 Volkswagen Jetta, and 2003 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.

Remove center, left and right insulation trays: → 50 BODY, FRONT
Remove front bumper: → 63 BUMPER
Bring lock carrier into service position: → 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 into tester.
Screw tester VAG 1342 with adapter VAG 1342/14 into oil filter bracket instead of oil pressure switch.

NOTE:

Observe installation position of adapter: The tapered connecting socket of the adapter is screwed to the pressure hose of the tester.

Connect brown wire of tester to Ground (-).
Connect diode test lamp VAG 1527 B to battery positive (+) and oil pressure switch using adapter cables from Supplemental measuring tool set VAG 1594 A. 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 run at idling speed. At 1.2...1.6 bar LED must light up; otherwise replace Oil pressure switch F1 , - -.