Oil Pressure Sender: Testing and Inspection

Oil pressure and oil pressure switch, checking





Special tools, testers and auxiliary items required
^ Oil pressure gauge V.A.G 1342
^ Voltage tester V.A.G 1527/B
^ Connector test set V.A.G 1594/A or connector test set V.A.G 1594/C

Conditions
^ Engine oil level OK; checking.
^ Engine oil temperature at least 80° C (radiator coolant fan must start up once)

Oil pressure switch, checking





- Remove Oil pressure switch -F1- and screw it into oil pressure gauge V.A.G 1342.
- Thread oil pressure gauge V.A.G 1342 into oil pan in place of oil pressure switch.
- Connect brown wire of tester to Ground (-).
- Connect voltage tester V.A.G 1527/B using adapter cables from connector test set V.A.G 1594/C to battery positive (B+) and Oil pressure switch -F1-.
- LED must not light up.

If LED lights up:
- Replace Oil pressure switch -F1-.

If LED does not light up:
- Start engine and slowly increase engine speed.
- LED must light up at 1.2 to 1.6 bar positive pressure, otherwise replace Oil pressure switch -F1-.

Oil pressure, checking
- Increase engine speed further.
- At 2000 RPM and an oil temperature of 80° C, oil pressure must be between 2.5 to 4.5 bar.

At higher engine speeds oil pressure must not exceed 7.0 bar

If the specifications are not obtained:
- Correct mechanical damage, e.g. bearing damage.
- Replace oil pump.

If the specification is exceeded:
- Check oil channels.
- If necessary, replace oil pump.