Oil Pressure Sender: Testing and Inspection

Oil Pressure and Switch, Checking

Special tools, testers and auxiliary items required

• Oil pressure gauge (VAG 1342)

• Voltage tester (VAG 1527B)

• Connector test set (VAG 1594C)

• Torque wrench 5-50 Nm (VAG 1331)

• Vehicle diagnosis, testing and information system (VAS 5051B)

Test Conditions

• Engine oil level OK. Checking, refer to --> [ Oil Level, Checking ] Testing and Inspection.

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

Test Sequence

• Tightening specification, refer to --> [ Oil Filter, Cooler and Pressure Switch Assembly Overview ] Service and Repair.

- Disconnect the electrical connector from the oil pressure switch.

- Remove the oil pressure switch - 2 - and install it into the (VAG 1342).





- Install the (VAG 1342) in place of the oil pressure switch in the bracket.

- Connect the brown wire - 1 - from the (VAG 1342) to a good ground.

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

• 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 slowly increase engine speed:

• LED must light up at 1.2 to 1.6 bar positive pressure, otherwise replace the oil pressure switch.

- Increase the engine speed (RPM) further:

• At 2000 RPM and an oil temperature of 80 °C, the oil pressure should 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:

- Examine the suction line strainer - item 17 - in the --> [ Oil Pan and Pump Assembly Overview ] Oil Pan and Pump Assembly Overview, for contamination.

• Check for mechanical damage, for example, bearing failures that can cause low oil pressure.

If no malfunction can be found:

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

If the specification is exceeded:

- Check the oil passages.