A4 Quattro Cabriolet V6-3.0L (BGN) (2005)
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Remove oil pressure switch and install VAG1342 oil pressure tester.
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Install oil pressure switch -2- on VAG 1342.
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Connect brown wire -1- of tester to ground (GND).
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Using VAG1594A connector test kit, connect VAG1527B voltage tester to oil pressure switch and Battery positive (+).
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LED must not be lit
If LED is lit:
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Replace oil pressure switch.
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Start engine.
Note: While starting engine, watch pressure tester and LED as oil pressure switch may open during start.
Black oil pressure switch
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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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Disconnect electrical wire from oil pressure switch.
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Remove oil pressure switch and install VAG1342 oil pressure tester.
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Install oil pressure switch -2- on VAG 1342.
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Start engine (engine oil temperature approximately 80°C).
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Oil pressure at idle: at least 1.5 bar
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Oil pressure at 2000 RPM: at least 3.0 bar
If specified values are not obtained:
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Pressure relief valve or oil pump faulty, replace oil pump.