Volkswagen Workshop Service and Repair Manuals > Golf Mk4 > Power unit | 4-cylinder injection engine (1.4 l and 1.6 l engine) | Engine lubrication | Parts of lubrication system | 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	Voltage tester -V.A.G 1527B-

t	Auxiliary measuring set -V.A.G 1594C-

Note

Functional check and repair of the optical and acoustic oil pressure warning: → Current flow diagrams, Electrical fault finding and Fitting locations

Test procedure

–	Remove oil pressure switch -F1- and screw it into oil pressure tester -V.A.G 1342-.

–	Screw oil pressure testing device -V.A.G 1342- in place of oil pressure switch -F1- in cylinder head.

–	Connect brown wire of tester to earth (-).

–	Connect voltage tester -V.A.G 1527B- to battery positive (+) and oil pressure switch using cables from auxiliary measuring set -V.A.G 1594C-.

–	Start engine and increase speed slowly. At 0.3…0.7 bar the LED must light up; otherwise renew oil pressure switch -F1-.

–	Increase engine speed further. At 2,000 rpm and an oil temperature of 80°C the oil pressure should be at least 2.0 bar.

At higher engine speeds, the oil pressure must not exceed 7.0 bar.

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