Engine Lubrication: Testing and Inspection

OIL PRESSURE AND OIL PRESSURE SWITCH, CHECKING:

Special Tools, Testers And Auxiliary Items:
^ VAG 1342 Oil pressure tester
^ VAG 1527B Voltage tester
^ VW 1594 Adapter kit

NOTE: For functional check and oil pressure warning system servicing: see Wiring Diagrams.

Test Sequence:



- Remove 0.3 bar oil pressure switch (brown) or 0.25 bar oil pressure switch (blue) and screw into tester.
- Screw tester VAG 1342 into position for oil pressure switch in cylinder head.
- Connect brown wire -3- of tester to Ground (-).



- Connect VAG 1527B LED tester between battery positive (+) and 0.3 bar or 0.25 bar oil pressure switch (F22) -A-.
^ LED must light up
- Start engine and slowly increase engine speed:
^ Brown switch: 0.15 to 0.45 bar
^ Blue switch: 0.15 to 0.35 bar
LED must go out, otherwise replace oil pressure switch.
- Connect LED tester to (white) 1.8 bar oil pressure switch -B-.
^ At 1.6 to 2.0 bar, LED must light up

If NO:

- Replace oil pressure switch.
- Increase engine speed further.
^ 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 pressure relief valve (in oil pump) or oil pressure switch.