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

Conditions
^ Engine oil level OK, checking.
^ Engine oil temperature at least 80° C (coolant fan must have run once).

Work sequence

Note: Function test and servicing the optical and acoustic oil pressure indicator: Electrical Wiring Diagrams, Troubleshooting Component Locations, Guided Fault Finding with VAS 5051





- Remove Oil pressure switch -F1- and screw into tester.
- Screw test device on in place of oil pressure switch in oil filter bracket.
- Connect brown lead of test device to Ground (-).
- Connect Voltage tester 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.
- Start engine and slowly increase engine speed.

LED must light up at 0.55 to 0.85 bar positive pressure.

If LED does not light up at specified pressure:
- Replace oil pressure switch.
- Increase engine speed further. At 2000 RPM and an oil temperature of 80° C, oil pressure must be at least 2.0 bar.

At higher RPMs, the oil pressure must not exceed 7.0 bar. If necessary, replace oil filter bracket.