Audi Workshop Service and Repair Manuals

Special tools and workshop equipment required

• ◆ V.A.G 1342
• ◆ V.A.G 1527 B
• ◆ V.A.G 1594 A

Test requirements:

• ● Oil level OK.
• ● Engine oil temperature approx. 80 °C.
• ● Oil pressure warning lamp K3 must come on when ignition is switched on.
• ● In vehicles with driver information system (DIS) the display "OK" must light up.

Check oil pressure switch 0.7 bar (brown) or 0.9 bar (grey), respectively

• ‒ Disconnect wire from oil pressure switch.
• ‒ → Unscrew oil pressure switch and screw in oil pressure tester V.A.G 1342.
• ‒ Screw oil pressure switch -2- intoV.A.G 1342.
• ‒ Connect brown wire 1 of tester to earth (-).
• ‒ Connect voltage tester V.A.G 1527 B to oil pressure switch and positive side of battery (+) using test leads from V.A.G 1594 A.
• ‒ LED should not illuminate.

• ‒ If the LED illuminates, fit a new oil pressure switch.
• ‒ Start the engine.

Note:

The switching point of the oil pressure switch can be reached when the engine is turned by the starter motor, so watch the tester and the LED while starting the engine.

Oil pressure switch brown:

• ‒ At 0.55 ... 0.85 bar, the LED must illuminate

Oil pressure switch, grey:

• ‒ At 0.75 ... 1.05 bar, the LED must illuminate
• If the LED does not illuminate, fit a new oil pressure switch.

Note:

As a replacement for the oil pressure switch 0.9 bar (grey) an oil pressure switch 0.7 bar (brown) is supplied.

Checking oil pressure

• ‒ Disconnect wire from oil pressure switch.
• ‒ → Unscrew oil pressure switch and screw in oil pressure tester V.A.G 1342.
• ‒ Screw oil pressure switch -2- intoV.A.G 1342.
• ‒ Start engine (engine oil temperature approx. 80 °C)..
• ‒ Oil pressure at idling speed: at least 0.8 bar
• ‒ Oil pressure at 2000 rpm: at least 2.0 bar
• ‒ Oil pressure at higher engine speeds: max. 7.0 bar

If the specified values are not obtained:

• ‒ Pressure relief valve or oil pump defective, replace oil pump .