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

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

• 1 or 2 pin oil pressure switches are installed. Check which oil pressure switch is installed. Checking the 2 pin oil pressure switch, refer to => [ Oil Pressure and Switch, Checking, 2 Pin Oil Pressure Switch ] Oil Pressure and Switch, Checking, 2 Pin Oil Pressure 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 1594C)

• Engine oil level OK

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

• For the functional check and servicing of the optical and acoustic oil pressure warning, refer to the wiring diagrams and the " Function and Component Selection".

- Remove the oil pressure switch (F1), refer to => [ Oil Pressure Switch ] Service and Repair and install it into the (V.A.G 1342).





- Install the (V.A.G 1342) into the oil filter bracket in place of the oil pressure switch.

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

- Connect the (V.A.G 1527 B) using adapter cables from (V.A.G 1594C) to the battery position terminal 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 RPM: the LED must come on at 1.2 to 1.6 bar pressure; if not, replace the oil pressure switch.

- Increase 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 oil pressure must not exceed 7.0 bar

If the specification is not obtained:

- Check the oil intake pipe screen 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 ] Oil Pump with Balance Shaft Drive.

If the specification is exceeded:

- Check the oil passages.

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