1. Unscrew the pressure sensor and screw it into the tester (pic. 5.33).
2. Screw the tester adapter into the hole for the pressure sensor in the cylinder head.
3. Connect the brown test lead to «-».
4. Connect the VAG 1527 diode tester with an additional wire to «+» battery and terminal A of the pressure sensor. The test lamp should light up.
5. Start the engine and slowly increase the engine speed. At a pressure of 0.15-0.45 for a brown sensor (0.3 bar) or at a pressure of 0.15-0.35 bar blue sensor (0.25 bar) the light should go out, otherwise replace the sensor.
6. Connect a diode tester to terminal B of the white pressure sensor (1.8 bar). The tester lamp should light up, otherwise replace the sensor.
7. Slowly increase engine speed. At 2000 rpm and 80°C, the pressure should be 2.0 bar. At high engine speeds, the oil pressure must not exceed a limit of 7 bar. If necessary, replace the oil pump cover with bypass valve.
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