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| Remove oil pressure switch -F1- → Chapter and screw it into tester. |
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| Screw tester into oil filter bracket in place of oil pressure switch. |
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| Connect brown wire of tester to earth (-). |
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| Connect voltage tester -V.A.G 1527 B- to battery positive (+) and oil pressure switch using cables from auxiliary measuring set -V.A.G 1594C-. LED must not light up. |
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| If the LED lights up, renew 1.4 bar oil pressure switch -F1-. |
If LED does not light up: |
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| Start engine and increase engine speed. At 1.2…1.6 bar, the LED must light up, otherwise renew oil pressure switch. |
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| Increase engine speed further. At 2000 rpm and an oil temperature of 80 °C the oil pressure should be between 2.7…4.5 bar. |
At higher engine speeds, the oil pressure must not exceed 7.0 bar. |
If specification is not attained: |
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| Check strainer in oil suction pipe for contamination/soiling → Item. |
Note Mechanical damage, e.g. to bearings, could also be the cause for oil pressure being too low. |
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| Renew oil pump and balancer shaft gear assembly → Chapter. |
If the specification is exceeded: |
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| If necessary, renew oil filter bracket with pressure relief valve. |
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