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

Note: Function test and servicing the optical and acoustic oil pressure indicator.

Test sequence
- Remove oil pressure switch F1 and screw into oil pressure gauge.
- Screw oil pressure gauge into the oil filter bracket in place of the oil pressure switch.
- Connect brown wire of tester to ground (-).
- Connect diode test lamp V.A.G 1527 B using adapter cables from connector test kit V.A.G 1594 A to B+ and oil pressure switch.
- LED must not light up.
- If LED lights up, replace 1.4 bar Oil Pressure Switch F1.

If LED does not light up:
- Start the engine and run at idle speed.
- LED must light up at 1.2 to 1.6 bar pressure, otherwise replace oil pressure switch.
- Increase engine speed further.
- At 2000 RPM and a coolant 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 specifications are not obtained:
- Examine the pick-up screen for clogging.
- Correct mechanical damage, e.g. bearing damage.

If no condition is found:
- Replace oil filter bracket with pressure relief valve, and oil pump.