Oil Pressure Sender: Testing and Inspection

Oil Pressure and Oil Pressure Switch, Checking

=> [ Oil Pressure Switch ].

=> [ Oil Pressure ].

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)

• For the functional check and servicing of the optical and acoustic oil pressure warning.

Test Conditions

• Engine oil level OK

• Engine oil temperature at least 80 °C (176 °F) (radiator fan must start up once).

Oil Pressure Switch

- Bring lock carrier into service position.

- Remove sealing plug => [ (Item 1) Plug ] Oil Filter Bracket Overview from oil filter bracket. Collect escaping engine oil.

- Seal the oil pressure switch test hole on the (V.A.G 1342) with the oil filter bracket sealing plug.

- Install the (V.A.G 1342) with the (V.A.G 1342/14) to the oil filter bracket in place of the plug.

• Pay attention to the installed position of the (V.A.G 1342/14) : the cone shaped connection on the (V.A.G 1342/14) is attached to the (V.A.G 1342) pressure hose.

- Connect the brown wire of the (V.A.G 1342) to Ground (GND).

- Connect the (V.A.G 1527B) to the battery positive terminal (connection in engine compartment - arrow -) and the oil pressure switch using adapter cables from (V.A.G 1594C).






• Light Emitting Diode (LED) must not light up.

If the LED lights up:

- Replace the oil pressure switch (F1) => [ (Item 2) ] Oil Filter Bracket Overview.

If the LED does not light up:

• While starting the engine, watch the (V.A.G 1342) and LED as the switch point of oil pressure switch may already be exceeded during start.

- Start the engine and run at idle speed.

• The LED must light up at 0.7 to 1.1 bar pressure, otherwise replace the oil pressure switch => [ (Item 2) ] Oil Filter Bracket Overview.

Oil Pressure

Procedure

- Install the (V.A.G 1342) with the (V.A.G 1342/14) to the oil filter bracket in place of the plug. Refer to => [ Oil Pressure Switch ].

- Check the oil pressure at different speeds:

• 1500 RPM: minimum 1.7 bar

• 2000 RPM: 3.0 to 5.5 bar

• Above 2000 RPM: maximum 7.0 bar

If the specified values are not reached:

- Check the screen in the oil intake pipe for contamination.

- Ensure the pressure pipe between the oil pump and cylinder block bolts are secure.

• Also, mechanical damage for example bearing damage can also be the cause of too low oil pressure.

If a malfunction is found despite insufficient oil pressure:

- Replace the oil pump. Refer to => [ Oil Pump Overview ] Service and Repair.

The oil pressure must not exceed 7.0 bar.

If 7.0 bar is exceeded:

- Check the oil passages.

Possibly the oil pressure relief valve in the oil pump is plugged.

- Replace the oil pump. Refer to => [ Oil Pump Overview ] Service and Repair.