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| Screw the testing device into the oil filter holder instead of the removed oil pressure switch. |
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| Connect brown cable of tester to earth (-). |
| –
| Connect the voltage tester -V.A.G 1527 B- with auxiliary cables out of the measuring tool set -V.A.G 1594 C- to battery positive (+) and oil pressure switch. |
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| The LED must not light up. |
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| If the LED lights up, replace the oil pressure switch. |
| If the LED does not light up: |
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| Start the engine and increase the engine speed. |
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| On the oil pressure switch -F22- the voltage tester must light up at 0.215 - 0.295 MPa (2.15 - 2.95 bar) oil overpressure, otherwise replace the oil pressure switch. |
| l
| On the oil pressure switch for reduced oil pressure -F378- the voltage tester must light up at 0.055 - 0.085 MPa (0.55 - 0.85 bar) oil overpressure, otherwise replace the oil pressure switch. |
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