Engine Lubrication: Testing and Inspection

OIL PRESSURE AND OIL PRESSURE SWITCH, CHECKING

Note: Functional check and servicing the optical and acoustic oil pressure warning: Wiring diagrams, Electrical Troubleshooting and Component Locations

Special tools, testers, measuring instruments and auxiliary items required
^ VAG 1342 Oil pressure tester
^ VAG 1527B Voltage tester
^ VW 1594 Adaptor kit

Test sequence





- Remove oil pressure switch F1 and screw into tester.
- Screw tester into the oil filter bracket in place of the oil pressure switch.
- Connect brown wire of tester to Ground (-).
- Connect VAG 1527 Voltage tester between battery positive (+) and oil pressure switch using Jumper wires from VW 1594.
^ LED must light up
- Start engine and increase speed slowly. At 1.2...1.6 bar the LED must go out, otherwise replace oil pressure switch.
- Increase engine speed further. At 2000 rpm and an oil temperature of 80°C the oil pressure should be at least 2.0 bar.

At higher engine speed the oil pressure must not exceed 70 bar. If necessary replace oil pump cover with pressure relief valve.