Oil Pressure Sender: Testing and Inspection

Oil pressure and oil pressure switch, checking





Special tools, workshop equipment, test and measuring appliances and aux. items required

^ V.A.G 1342 Oil pressure tester
^ V.A.G 1527 B voltage tester
^ V.A.G 1594 A Adapter set

Test conditions
^ Engine oil level OK.
^ Engine oil temperature at least 80°C (radiator fan must have run once)

Note: Functional check and servicing the optical and acoustic oil pressure warning.

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 1527B voltage tester using aux. cables from V.A.G 1594 A to battery positive (+) and oil pressure switch. LED must not light up.
^ If the LED lights up, replace 1.4 bar oil pressure switch (F1) .

If the LED does not light up:
^ Start engine and run at idling speed: At 1.2 to 1.6 bar the LED must light up, otherwise replace oil pressure switch.
^ Check oil pressure at different speeds: 2000 RPM: 2.7 to 4.5 bar Above 2000 RPM: max. 7.0 bar.

If the specifications are not obtained:
^ Repair mechanical damage, damage, e.g. bearing damage.
^ Replace oil filter bracket with pressure relief valve.
At higher engine speeds the oil pressure must not exceed 7.0 bar
If the specification is exceeded:
^ Check oil galleries.
^ If necessary, replace oil filter bracket with pressure relief valve.