Engine Oil Pressure: Testing and Inspection

Oil Pressure Switch and Oil Pressure, Checking

Special tools, testers and auxiliary items required

• Oil Pressure Gauge (V.A.G 1342)

• Voltage Tester (V.A.G 1527 B)

• Test Adapter Kit (V.A.G 1594 A)

• Functional test and servicing the optical and acoustic oil pressure indicator, refer to

Conditions

• Engine oil temperature min. 80 °C (176 °F).

• The engine oil level is OK.

Sequence

- Remove the oil pressure switch. Refer to one of the following:

=> [ Oil Pressure Switch ] Oil Pressure Switch

=> [ Reduced Oil Pressure Switch ] Reduced Oil Pressure Switch

- Install the (V.A.G 1342) into the hole for the oil pressure switch.





- Install the oil pressure switch - 2 - into the (V.A.G 1342).

- Connect the brown wire - 1 - from the (V.A.G 1342) to ground (GND).

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

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

If LED lights up:

- Replace the oil pressure switch.

- Start the engine.

• While starting engine, watch the (V.A.G 1342) and the LED as the oil pressure switch may open during starting.

• At 0.7 to 1.1 bar pressure, the LED must light up.

If LED does not light up:

- Replace the oil pressure switch.

Oil Pressure, Checking

- Start the engine.

• Oil pressure at idle: at least 1.8 bar

• Oil pressure at 2000 RPM: at least 4.0 bar

If the target values are not reached: the pressure relief valve or oil pump is malfunctioning.

- Replace the oil pump. Refer to => [ Oil Pump ] Oil Pump.