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

Requirements for test:

• ● 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 the "OK" must appear in the display.

Test sequence

• ‒ → Remove engine cover panel -arrows-.

Testing oil pressure switch

• ‒ → Disconnect wire from oil pressure switch -arrow-.

• ‒ → 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.
• ‒ Test lamp should not light up.

• ‒ If the test lamp lights up, 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 cranked on the starter motor, so watch the tester and the test lamp while starting the engine.

Black oil pressure switch:

• ‒ Test lamp should light up at 1.2...1.6 bar.
• If the test lamp does not light up, fit a new oil pressure switch.

Testing oil pressure

• ‒ → Disconnect wire from oil pressure switch -arrow-.

• ‒ → 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 at least 80°C).
• ‒ Oil pressure at idling speed: at least 1.3 bar
• ‒ Oil pressure at 2000 rpm: between 3.5 and 4.5 bar

If the specifications are not obtained:

• ‒ Pressure relief valve or oil pump defective; renew oil pump .