Passat Sedan V6-3.6L (BLV) (2008)
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Oil Pressure Switch (For Fuel Pump): Testing and Inspection
Oil Pressure and Oil Pressure Switch, Checking
Special tools, testers and auxiliary items required
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Oil pressure gauge V.A.G 1342
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Adapter V.A.G 1342/14
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Voltage tester V.A.G 1527 B
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Connector test set V.A.G 1594C
Note:
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Function test and servicing the optical and acoustic oil pressure indicator.
Test Conditions
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Engine oil level OK.
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Engine oil temperature at least 80 degree C (radiator fan must start up once)
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Selector lever must be in position "P" or "N".
Oil Pressure Switch
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Remove insulation pan.
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Unscrew sealing plug from oil filter housing.
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Seal test hole for oil pressure switch on oil pressure tester V.A.G 1342 using sealing plug for oil filter housing.
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Screw oil pressure tester V.A.G 1342 with adapter V.A.G 1342/14 into oil filter bracket in place of sealing plug.
Note:
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Note installation position of adapter. The conical connecting neck of the adapter is screwed to the pressure hose of the tester.
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Connect brown wire of tester to ground (GND)(-).
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Connect diode test lamp V.A.G 1527 B to B+ and oil pressure switch (connection in engine compartment - arrow - ) using adapter cables from
connector test kit V.A.G 1594C. LED must not light up.
If the LED lights up:
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Replace oil pressure switch F1
If the LED does not light up:
Note:
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While starting engine, watch pressure tester and LED as switch point of oil pressure switch may already be exceeded during start.
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Start the engine and run at idle speed. AT 0.7 to 1.1 bar positive pressure, light diode must come on. Otherwise, replace oil pressure switch F1.
Oil Pressure
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Check oil pressure at different speeds:
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1500 RPM: at least 1.7 bar
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2000 RPM: 3.0 to 5.5 bar pressure
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above 2000 RPM: maximum 7.0 bar
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If the specified values are not reached:
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First check control piston of oil pressure relief valve in oil pump for soiling.
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To do so, first unscrew sealing plug from cylinder block, then unscrew sealing plug from oil pump.
