Oil pressure switches, checking
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2004 Audi A6, 2003 Audi S6, 2003 Audi A6, 2002 Audi S6, and 2002 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.
Oil pressure indicator with audible and visible warning
Read measured value block. For model years up to 2000, see READ MEASURING VALUE BLOCK (SCAN TOOL FUNCTION 08) . For model years 2001 and up, see READ MEASURING VALUE BLOCK (FUNCTION 08) .
Test requirements
- Measured value block OK.
- Oil level OK.
- Oil pressure warning lamp (K3) should light up when ignition is switched on.
- On vehicles with auto-check system, "OK" should appear in the display (call up symbol).
- Engine oil temperature about 80°C (176°F). Radiator fan must have started at least once.
- Remove engine cover panel.
- Remove upper section of air cleaner and set aside.
- Remove lower section of air cleaner.
- Remove oil pressure switch and install adapter VAG 1342/3 in its place.
- Install VAG 1342 into adapter VAG 1342/3.
- Install oil pressure switch into VAG 1342.
- Connect brown wire -2- to Ground (GND).
- Connect blue wire -1- to oil pressure switch.
- Connect diode test light VAG 1527 to wire -1- and battery (+).
- Install lower section of air cleaner.
- Install upper section of air cleaner.
- Start engine and test switching points of switch by varying engine speed as required.
OIL PRESSURE SPECIFICATION
| Oil pressure at idling speed | 1 to 2.5 bar |
| Oil pressure at 3000 rpm | 3 to 5 bar |
NOTE:
- Brown oil pressure switch (0.3 bar) should open at 0.15 to 0.45 bar.
- White oil pressure switch (1.8 bar) should close at 1.6 to 2.0 bar.