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| Connect brown wire -1- of oil pressure tester to earth (-). |
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| Connect voltage tester -V.A.G 1527 B- with test leads from adapter set -V.A.G 1594 A- to oil pressure switch and battery positive (+). |
| l
| LED should not light up. |
| –
| Renew oil pressure switch. |
Note! | Observe tester and LED while starting, as switching point of oil pressure switch may already be exceeded when starting. |
| l
| Test lamp should light up at 1.2 ... 1.6 bar. |
| If the LED does not light up: |
| –
| Renew oil pressure switch. |
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