Volkswagen Workshop Service and Repair Manuals > Golf Mk6 > Power unit | 4-cyl. direct injection engine (2.0 l 4V turbocharger, toothed belt drive) | Engine lubrication | Oil filter, oil pressure switch | Checking oil pressure and oil pressure switch

Checking oil pressure and oil pressure switch

Special tools and workshop equipment required

t	Oil pressure tester -V.A.G 1342-

t	Test instrument adapter/DSO (2-pin) -VAS 5256-

t	Hand-held multimeter -V.A.G 1526D-

l	Engine oil level OK.

l	Engine oil temperature at least 80 °C (radiator fan must have run once)

Note

Functional check and repair of the optical and acoustic oil pressure display: Current flow diagrams → Vehicle diagnostic tester.

Carry out the following work:

–	Remove oil pressure switch -F1- → Chapter and screw into tester.

–	Screw tester into oil filter bracket in place of oil pressure switch.

–	Connect test instrument/DSO adapter (2-pin) -VAS 5256- to oil pressure switch

–	Connect Multimeter -V.A.G 1526D- to test instrument/DSO adapter (2-pin) -VAS 5256- and check for continuity.

l	Oil pressure switch must be open below 1.2 bar.

–	Start engine and increase rpm; oil pressure switch must close at pressure of 1.2…1.6 bar, otherwise renew oil pressure switch.

–	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:

–	Check strainer in oil intake pipe → Item for dirt.

Note

Mechanical damage, e.g. to bearings, could also be the cause for oil pressure being too low.

If no damage is found:

–	Fit new oil pump with balancer shaft module → Chapter.

If the specification is exceeded:

–	Check oil channels.

–	If necessary, renew oil filter bracket with pressure relief valve.

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