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| Remove oil pressure switch -F1- and screw 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 1527B- 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. |
| If the specification is exceeded: |
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