Oil pressure and oil pressure switch F1 , checking

WARNING: This page is about a different car, the 2006 Audi A8, 2005 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Special Tools - Oil Pressure And Oil Pressure Switch F1 , Checking

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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
Vehicle diagnostic, testing, and information system VAS 5051

Test requirements

Oil level OK
Engine oil temperature approximately 80°C.

Checking oil pressure switch F1

Fig 2: Disconnecting Electrical Harness Connector From Oil Pressure Switch F1

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical harness connector - arrow - from oil pressure switch F1.
Remove oil pressure switch F1.

Fig 3: Connecting Oil Pressure Gauge V.A.G 1342 With Adapter V.A.G 1342/14 To Hole For Oil Pressure Switch F1

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect oil pressure gauge V.A.G 1342 with adapter V.A.G 1342/14 to hole for oil pressure switch F1.
Install oil pressure switch F1 - 2 - into oil pressure gauge V.A.G 1342.
Connect brown wire - 1 - of tester to Ground (GND).
Connect voltage tester V.A.G 1527B using adapter cables from connector test kit V.A.G 1594A to oil pressure switch F1 and battery plus (+).

LED must not light up.

If LED is lit, replace oil pressure switch F1.
Start engine.

NOTE:

While starting engine, watch Pressure Tester and LED as oil pressure switch may open during start.

Black oil pressure switch:

At 1.2 to 1.6 bar pressure, LED must light up.

If LED is not lit, the oil pressure switch must be replaced.

Oil pressure, checking

Fig 4: Disconnecting Electrical Harness Connector From Oil Pressure Switch F1

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical harness connector from oil pressure switch - arrow -.
Remove oil pressure switch.

Fig 5: Connecting Oil Pressure Gauge V.A.G 1342 With Adapter V.A.G 1342/14 To Hole For Oil Pressure Switch F1

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect oil pressure gauge V.A.G 1342 with adapter V.A.G 1342/14 to hole for oil pressure switch.
Install oil pressure switch - 2 - in oil pressure gauge V.A.G 1342.
Start engine (engine oil temperature approximately 80°C).

Oil pressure at idle: at least 1.0 bar
Oil pressure at 2000 RPM: at least 3.5 bar