SEAT Workshop Service and Repair Manuals > Leon Mk2 > Power unit | 4-cyl. injection engine. (1.6ltrs., 2 valves) | Engine lubrication | Lubrication system | Oil pressure and oil pressure switch checking

Oil pressure and oil pressure switch checking

Special tools and workshop equipment required

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

t	Diode test lamp -V.A.G 1527 B-

t	auxiliary measuring set -V.A.G 1594 A- or -V.A.G 1594 C-

Checking conditions

l	Engine oil level OK, checking → Fig..

l	Engine oil temperature 80 ºC (radiator fan must have run at some time).

Note

Check the functioning and repairing of the optical and acoustic oil pressure warning lamps → Current flow diagrams, Electrical fault finding and Fitting locations.

Test sequence

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

–	Screw tester into the cylinder head in place of the oil pressure switch.

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

–	Connect diode test lamp -V.A.G 1527 B- using -V.A.G 1594 A- or -V.A.G 1594- aux. cables to battery positive (+) and to oil pressure switch.

LED must not light up.

–	If the LED lights up, renew oil pressure switch -F1-.

If the LED does not light up

–	Start engine and slowly increase engine revolutions. The LED should light up between 0,3-0.6 bar; if not, renew the oil pressure switch.

–	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 speed the oil pressure must not exceed 7.0 bar. If it does so, replace the oil pump.

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