Passat GLS Wagon L4-1.8L Turbo (AUG) (2001)
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Remove oil pressure switch F1 and install in tester.
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Thread tester into oil pan in place of oil pressure switch.
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Connect brown wire of tester to Ground (GND).
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Using adapters from VAG1594A, connect VAG1527B Voltage Tester to B+ and oil pressure switch. LED must not light up.
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If LED lights up, replace 1.4 bar oil pressure switch -F1-.
If LED does not light up:
Start engine and let run at idle: LED must light up with 1.2 to 1.6 bar positive pressure, otherwise replace oil pressure switch.
Oil pressure at idle: minimum 2 bar
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Increase engine speed (RPM) further. At 2000 RPM and an oil temperature of 80°C, oil pressure must be between 3.0 and 4.5 bar.
If specified values are not obtained:
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Repair mechanical damage, e.g. bearing damage.
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Oil filter holder with pressure valve, if necessary, replace oil pump.
Oil pressure must not exceed 7.0 bar at higher engine speeds.