Note:
Functional check and servicing the optical and acoustic oil pressure warning:
=> Current flow diagrams, Electrical fault finding and Fitting locations
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Remove 1.4 bar oil pressure switch (F1) (black insulation) and screw into test unit.
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‒ Screw tester into the cylinder head in place of the oil pressure switch.
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‒ Connect brown wire of tester to earth (-).
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‒ Connect diode test lamp V.A.G 1527 B 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, renew 1.4 bar oil pressure switch (F1) .
When the LED does not light up:
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‒ Start engine and run at idling speed
at
1.2...1.6 bar
the LED must light up, otherwise renew 1.4 bar oil pressure switch (F1).
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‒ Increase engine speed further.
At 2000 rpm and an oil temperature of 80 °C the oil pressure should be at least 2.0 bar.
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