Engine Lubrication: Testing and Inspection

OIL PRESSURE AND OIL PRESSURE SWITCH, CHECKING





Special tools, workshop equipment, test and measuring appliances and auxiliary items required
^ VAG 1342 Oil pressure tester
^ VAG 1527B Voltage Tester
^ VW 1594 Adaptor kit

Note: For functional check and servicing the optical and acoustic oil pressure warning: Wiring diagram

Test sequence





- Remove oil pressure switch (Fl) and screw into tester.
- Screw tester into oil filter bracket in place of oil pressure switch.
- Connect brown wire of tester to Ground (-).
- Connect VAG 1527B between battery positive (+) and oil pressure switch using jumper wires from VW 1594 adaptor kit.
^ LED must light up.
- Start engine and increase speed slowly,
^ At 0.75 to 1.05 bar LED must go out, otherwise replace oil pressure switch.
- Increase engine speed.
^ At 2000 rpm and an oil temperature of 80°C oil pressure must be 2.0 bar minimum.

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