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

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

• 1 and 2 pin oil pressure switches are installed. Check which oil pressure switch is installed. Checking the oil pressure and switch (2 pin switch). Refer to => [ Oil Pressure and Switch, Checking, with a 2 Pin Switch ] Oil Pressure and Switch, Checking, with a 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) (radiator fan must start up once).

• Function test and servicing the optical and acoustic oil pressure indicator. Refer to wiring diagrams, or to "Function and Component Selection" in the vehicle diagnosis, testing and information system VAS 5051.

- Remove the oil pressure switch (F1). Refer to => [ Oil Pressure Switch (F1) ] Service and Repair and install it into the oil pressure gauge.






- Install the oil pressure gauge into the oil filter bracket in place of the oil pressure switch.

- Connect the brown wire from the tester to Ground (GND) (-).

- Connect the voltage tester (V.A.G 1527 B) using an adapter cable from the connector test set (V.A.G 1594 C) to B+ 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 illuminate at 1.2 to 1.6 bar. Replace the oil pressure switch if it does not.

- Increase the engine speed further. At 2000 RPM 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 screen in the oil intake pipe => [ (Item 10) Oil Intake Pipe ] Service and Repair 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 with balance shaft drive. Refer to => [ Oil Pump with Balance Shaft Drive ] Service and Repair.

If the specification is exceeded:

- Check the oil passages.

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