SEAT Workshop Service and Repair Manuals

Test sequence

–  Remove cover above camshaft housing -arrows-.

–  Pull 4 pin connector off ignition transformer -arrow-.

–  Pull terminal connectors -arrows- off all injectors.

–  Connect diode test lamp -V.A.G 1527- using aux. cables from -V.A.G 1594- to connector contacts of Cyl. –  Operate the starter and check the voltage supply for No. 1 cylinder injector. LED must light up –  Repeat check at the injector connectors for Cyls. 2...4. –  Switch off ignition. If the LED does not light up on any cylinder:

–  Connect diode test lamp to Cyl. 1 connector, contact 1 and earth. –  Operate the starter and check the voltage supply for No. 1 cylinder injector. LED must light up –  Repeat check at the injector connectors for Cyls. 2...4. If the LED does not light up: –  Switch off ignition. –  Check wiring between 2-pin connector contact 1 and fuel pump relay -J17- for open circuit using current flow diagram. Wire resistance: max. 1.5 Ω If the LED does not light up on one or several cylinders:

–  Connect test box -V.A.G 1598/22- to control unit wiring harness.

–  Check the wiring between test box and 2-pin connectors of injectors, using current flow diagram Injector 1: Contact 2+socket 73 Injector 2: Contact 2+socket 80 Injector 3: Contact 2+socket 58 Injector 4: Contact 2+socket 65 Wire resistance: max. 1.5 Ω –  Additionally check wires for short to one another. Specification: ∞ Ω –  Check the cables between contacts 1 of the injector connectors for breaks. Wire resistance: max. 1.5 Ω