S4 Quattro Cabriolet V8-4.2L (BHF) (2008)
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Disconnect electrical harness connector from Oil Pressure Switch F1 - arrow -.
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Remove oil pressure switch.
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Connect oil pressure tester V.A.G 1342 with adapter V.A.G 1342/14 to hole for oil pressure switch.
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Install oil pressure switch -2- into oil pressure gauge V.A.G 1342.
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Place the brown wire of oil pressure gauge on Ground (GND).
Oil pressure switch, checking
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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
("+").
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LED must not light up.
If LED lights up:
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Replace Oil Pressure Switch.
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Start engine.
Note:
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While starting engine, watch Pressure Tester and LED as oil pressure switch may open during start.
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At 1.2 to 1.6 bar pressure, LED must light up.
If LED does not light up:
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Replace Oil Pressure Switch.
Oil pressure, checking
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Start engine.
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Oil pressure at 2000 RPM: min. 2.0 bar
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Oil pressure at 3500 RPM: min. 3.5 bar
Assembling
Assembly is in reverse order of removal, note the following:
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Install oil pressure switch Oil Pressure Switch F1, removing and installing.