Oil Temperature Sensor/Switch: Testing and Inspection

Oil Pressure and Oil Pressure Switch, Checking





Special tools, testers and auxiliary items required

• Oil pressure gauge (V.A.G 1342)

• Adapter (V.A.G 1342/14)

• Voltage tester (V.A.G 1527B)

• Connector test set (V.A.G 1594C)

Test conditions

• Engine oil level OK.

• Oil pressure warning lamp (K3) must light up for approx. 3 seconds when ignition is switched on

• Engine oil temperature at least 80°C (radiator fan must have run once)

Oil pressure, checking

- Check oil pressure at different speeds: 2000 RPM: 3.0 to 5.5 bar over 2000 rpm: maximum 7.0 bar

If specifications are not obtained:

- Correct mechanical damage, e.g. bearing damage.

At higher engine speeds oil pressure must not exceed 7.0 bar

If specification is exceeded:

- If necessary, replace oil pump --> [ Oil Pump ] Oil Pump

Oil pressure switch, checking

- Remove oil pressure switch (F1) and install oil pressure gauge.





- Install oil pressure gauge (V.A.G 1342) with adapter (V.A.G 1342/14) into oil filter housing in place of oil pressure switch. --> [ (Item 16) , 20
Nm ] Service and Repair

• Note installation position of adapter: The conical connecting neck of the adapter is install to the pressure hose of the tester.

- Connect brown wire of tester to Ground (GND) (-).

- Connect voltage tester (V.A.G 1527B) using assist cables from (V.A.G 1594 C) to battery positive (+) and oil pressure switch. LED must not light up.

If LED lights up:

- Replace oil pressure switch (F1).

If LED does not light up:

- Start engine and run at idle speed. At 1.2 to 1.6 bar pressure LED must light up; otherwise replace Oil Pressure Switch (F1).