SEAT Workshop Service and Repair Manuals > Leon Mk2 > Power unit | 4-cylinder diesel engine (1.6 l 4V, TDI Common-Rail) | Engine lubrication | Oil filter bracket, oil pressure, oil radiator and oil supply pipe | Oil pressure and oil pressure switch: checking

Checking oil pressure switch

Test prerequisites

l	Engine oil okay, check → Chapter

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

Note

–	Remove the oil pressure switch -F1- → Item, green insulation, and screw it into the tester.

–	Attach the oil pressure tester -VAG 1342- to the borehole for the oil pressure switch.

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

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

–	Connect voltage tester -VAG 1527B- with auxiliary cables from the auxiliary cable kit -VAG 1594C- to positive of battery (+) and to oil pressure switch.

l	LED should not light up.

Note

Renew oil pressure switch -F1- if LED lights up at this stage.

–	Start the engine.

Note

Observe oil pressure tester and LED while starting engine, as switching point of oil pressure switch may already be exceeded when starting.

l	LED should light up at 0.3 ... 0.6 bar.

–	If LED does not light up, replace oil pressure switch -F1- → Chapter.

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