GTI L4-1.8L Turbo (AWP) (2003)
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Remove oil pressure switch (F1) and screw into tester.
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Screw tester into the oil filter bracket in place of the oil pressure switch.
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Connect brown wire of tester to Ground (-).
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Connect VAG 1527B voltage tester using aux. cables from V.A.G 1594 A to battery positive (+) and oil pressure switch. LED must not light up.
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If the LED lights up, replace 1.4 bar oil pressure switch (F1).
If the LED does not light up:
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Start engine and run at idling speed: At 1.2 to 1.6 bar the LED must light up, otherwise replace oil pressure switch.
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Check oil pressure at different speeds: 2000 RPM: 2.7 to 4.5 bar Above 2000 RPM: max. 7.0 bar.
If the specifications are not obtained:
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Repair mechanical damage, damage, e.g. bearing damage.
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Replace oil filter bracket with pressure relief valve.
At higher engine speeds the oil pressure must not exceed 7.0 bar
If the specification is exceeded:
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Check oil galleries.
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If necessary, replace oil filter bracket with pressure relief valve.