Engine Lubrication: Testing and Inspection

Checking Oil Pressure and Oil Pressure Switch





NOTE: To functionally check and service the optical and acoustical oil pressure display system, See wiring diagrams.

- Remove the 1.8 bar oil pressure switch (white) and thread it into tester VAG 1342
- Thread the tester into the oil filter flange in place of the removed switch
- Connect the brown wire of the tester to ground
- Connect LED tester VAG 1527 between battery positive and -A- the 0.3 bar oil pressure switch (F 22) using jumper wires from the VW 1594 adaptor kit

- The LED tester must light up

- Start the engine and slowly increase engine speed

- Between 0.15 to 0.45 bar the LED tester must switch off, if not, then replace the 0.3 bar pressure switch





- Connect LED tester to -B- 1.8 bar oil pressure switch (F 1)

- Between 1.6 to 2.0 bar the LED tester must light up, if not, then replace the 1.8 bar oil pressure switch

- Increase engine rpm

- At an engine speed of 2000 rpm and an oil temperature of 80 °C (176 °F) the oil pressure must be 2.0 bar minimum