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 C

Requirements
^ Oil level OK, checking.
^ Oil pressure warning lamp must light up for approximately 3 seconds when ignition is switched on
^ On vehicles with Auto-Check-System, the indicator O.K. must light up (check symbol).
^ Engine oil temperature at least 80° C (radiator fan must start up once)

Work sequence





- Remove Oil Pressure Switch F1 - A - and screw it into oil pressure gauge.
- Thread oil pressure gauge into oil filter bracket 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 B+ and oil pressure switch F1 - B -. LED must not light up.
- If LED lights up, replace 1.4 bar oil pressure switch.

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

Oil pressure at idle: min. 2 bar
- Increase engine speed. At 2000 rpm and an oil temperature of 80° C, the oil pressure should be between 2.7 to 4.5 bar

If specifications are not obtained:
- Correct mechanical damage, e.g. bearing damage.
- Replace oil filter bracket with pressure valve, or balance shaft housing with oil pump.

At higher engine speeds oil pressure must not exceed 7.0 bar

If specification is exceeded:
- Check oil channels.
- If necessary, replace oil filter bracket with pressure relief valve.

Torque specifications