Oil Pressure Switch (For Fuel Pump): Testing and Inspection

Oil pressure and oil pressure switch, checking





Special tools, testers and auxiliary items required

^ Oil pressure gauge V.A.G 1342 with adapter V.A.G 1342/14
^ Voltage tester V.A.G 1527 B
^ Connector test set V.A.G 1594 C

Test conditions

^ Oil level OK
^ Engine oil temperature approximately 90 degrees C.

Test sequence





- Remove rear engine cover - arrows -.





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





- Connect oil pressure tester V.A.G 1342 with adapter V.A.G 1342/14 to hole for oil pressure switch.
- Install oil pressure switch -2- into oil pressure gauge V.A.G 1342.
- Place the brown wire of oil pressure gauge on Ground (GND).

Oil pressure switch, checking

- Connect voltage tester V.A.G 1527 B -1- with adapter cables from connector test kit V.A.G 1594 C to oil pressure switch and battery positive ("+").

^ LED must not light up.

If LED lights up:

- Replace Oil Pressure Switch.
- Start engine.

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

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

If LED does not light up:

- Replace Oil Pressure Switch.

Oil pressure, checking

- Start engine.

^ Oil pressure at 2000 RPM: min. 2.0 bar
^ Oil pressure at 3500 RPM: min. 3.5 bar

Assembling

Assembly is in reverse order of removal, note the following:

- Install oil pressure switch Oil Pressure Switch F1, removing and installing.