Oil pressure and oil pressure switch, checking

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Special tools, testers and auxiliary items required

Fig 1: Identifying Special Tools - Oil Pressure And Oil Pressure Switch, Checking

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Oil pressure gauge V.A.G 1342
Voltage tester V.A.G 1527B
Test adapter kit 1594 A

NOTE:

Function test and servicing the optical and acoustic oil pressure indicator: Wiring diagrams, Guided Fault Finding using VAS 5051

Test sequence

Fig 2: Identifying V.A.G 1342 Oil Pressure Tester

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove oil pressure switch F1 and screw into oil pressure gauge.
Thread oil pressure gauge into oil filter bracket in place of oil pressure switch.
Connect brown wire of tester to Ground (GND) (-).
Connect voltage tester V.A.G 1527B using assist cables from V.A.G 1594 A to battery positive (+) and oil pressure switch. LED must not light up.

If LED lights up, replace 0.7 bar Oil Pressure Switch F1.

If LED does not light up:

Start engine and slowly increase engine speed. LED must light up at 0.55 to 0.85 bar positive pressure, otherwise replace oil pressure switch.
Increase engine speed further. At 2000 RPM and an oil temperature of 80 ° C, oil pressure must be at least 2.0 bar.

If specifications are not obtained:

Correct mechanical damage, e.g. bearing damage.
Replace oil filter bracket with pressure relief valve or oil pump.

At higher engine speeds oil pressure must not exceed 7.0 bar

If specification is exceeded:

Check oil channels.
If necessary, replace oil filter bracket with pressure relief valve.