Oil Pressure and Oil Pressure Switch, Checking, 1 Pin Switch

Oil Pressure and Oil Pressure Switch, Checking, 1 Pin Switch

• 1 and 2 pin oil pressure switches are installed. Check which oil pressure switch is installed. Check the oil pressure and oil pressure switch (2 pin oil pressure switch). Refer to => [ Oil Pressure and Oil Pressure Switch, Checking, 2 Pin Switch ] Oil Pressure and Oil Pressure Switch, Checking, 2 Pin Switch.

Special tools, testers and auxiliary items required

• Oil Pressure Gauge (V.A.G 1342)

• Voltage Tester (V.A.G 1527 B)

• Connector Test Set (V.A.G 1594 C)

• The engine oil level is OK

• The engine oil temperature is at least 80 °C (176 °F) (coolant fan must start up once).

• Function test and servicing the optical and acoustic oil pressure indicator: "Function and Component Selection" in the vehicle diagnostic tester.

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






- Thread the oil pressure gauge into the oil filter adapter in place of the oil pressure switch.

- Connect the brown wire on the gauge to ground (-).

- Connect the voltage tester (V.A.G 1527 B) with adapter cables from the connector test set (V.A.G 1594 C) to battery positive (+) and the oil pressure switch. The Light Emitting Diode (LED) must not light up.

- If the LED lights up, replace the oil pressure switch.

If the LED does not light up:

- Start the engine and increase the engine speed. The LED must come on at 1.2 to 1.6 bar pressure. If not, replace the oil pressure switch.

- Increase the engine speed further. At 2000 RPM/min and an oil temperature of 80 °C (176 °F), the oil pressure must be between 2.7 and 4.5 bar.

At higher engine speeds the oil pressure must not exceed 7.0 bar

If the specification is not obtained:

- Check the oil intake pipe strainer for contamination.

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

If no malfunction can be found:

- Replace the oil pump. Refer to => [ Oil Pump with Balance Shaft Drive ] Service and Repair.

If the specification is exceeded:

- Check the oil passages.

- If necessary, replace oil filter adapter with pressure relief valve.