SEAT Workshop Service and Repair Manuals

Motronic current supply relay -J271-: checking

Special tools and workshop equipment required

t	Manual multimeter -VAG 1526B-

t	Measuring tool set -VAG 1594C-

t	Tester -VAG 1598/31-

t	Current flow diagrams

Note The Motronic current supply relay -J271- supplies current to the output stages of the ignition oils, as well as the engine control unit through contact 121. Test sequence –  Remove engine cover .

–  Remove 4-pin connector -1- from one of the ignition coils -2-.

–  Measure the voltage supply with the multimeter and the measuring tool set -VAG 1594C-in the following manner:

Connector, contact	Measure at
1	Engine earth

–  Switch on ignition. Specification: approx. battery voltage. If specification is not attained: –  Switch off ignition. –  Remove the shelf on driver's side: → Bodywork, interior fitting work; Rep. Gr.68

–  Check connection between connector and relay carrier:

Connector, contact	Relay carrier (relay position 10), contact
4	6

If wiring is OK –  Check the voltage supply of the Motronic current supply relay -J271- → Chapter. –  Check the activation of the Motronic current supply relay -J271- → Chapter.