SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4 cyl., injection engine (4V) | Engine lubrication | Lubrication system components: removing and installing

Oil pressure and oil pressure switch: testing

Special tools and workshop equipment required

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

t	Diode lamp -V.A.G 1527-

t	Auxiliary measurement set -V.A.G 1594-

Note!

Operation inspection and repair of the visual and acoustic oil pressure indicators: → Current flow diagrams, Electrical fault finding and Fitting locations.

Test process

–	Remove the oil pressure switch -F1- and thread it onto the gauge.

–	Thread the gauge into the cylinder head, in the place of the oil pressure switch.

–	Connect the brown wire of the gauge to earth (-).

–	Connect diode lamp -V.A.G 1527 B- with auxiliary leads of the -V.A.G 1594 A- to battery positive (+) and to the oil pressure switch. The diode lamp should not light up.

–	If the diode lamp lights up, replace the oil pressure switch.

If the diode lamp does not light up:

–	Start the engine and slowly raise the revs.Between 0.3...0.7 bar of pressurethe diode lamp should light up; if not, replace the oil pressure switch.

–	Continue increasing the revs. To 2000/min; at an oil temperature of 80°C, the oil pressure should be at least 2.0 bar.

At higher revs, the oil pressure should not exceed 7.0 bar. If necessary, replace the oil pump cover with the discharge valve.

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