Oil Pressure Sender: Testing and Inspection

Oil pressure and oil pressure switch, checking





Special tools, testers and auxiliary items required
^ Oil pressure tester V.A.G 1342
^ Diode test lamp V.A.G 1527 B
^ Adapter set V.A.G 1594 A

Note: Functional check and servicing the optical and acoustic oil pressure warning: Electrical Wiring Diagrams, Troubleshooting Component Locations, Vehicle diagnosis, testing and information system VAS 5051

Work sequence





- Remove Oil pressure switch -F1- and screw into tester.
- Screw tester into oil filter bracket in place of oil pressure switch.
- Connect brown wire of tester to ground (-).
- Connect diode test lamp V.A.G 1527 B using auxiliary cables V.A.G 1594 A to battery positive (+) and oil pressure switch. LED must not light up.
- Start engine and increase speed slowly.

Oil pressure switch, brown:
- At 0.55 to 0.85 bar LED must light up; otherwise replace oil pressure switch.
- Increase engine speed further. At 2000 rpm and an oil temperature of 80°C oil pressure should be at least 2.0 bar.

For higher engine speeds the oil pressure must not exceed 7.0 bar. If necessary replace the oil filter bracket.

Oil pressure switch, gray:
- At 0.75 to 1.05 bar LED must light up; otherwise replace oil pressure switch.
- Increase engine speed further. At 2000 rpm and an oil temperature of 80°C oil pressure should be at least 2.0 bar.

For higher engine speeds the oil pressure must not exceed 7.0 bar. If necessary replace oil filter bracket.