Volkswagen Workshop Service and Repair Manuals > Polo Mk4 > Vehicle electrics | Electrical system | Wiring | Control units | Control unit for the on-board electrical systemJ519 | Control unit for the on-board electrical systemJ519

Control unit for the on-board electrical systemJ519 - replace

Control unit for the on-board electrical system -J519- - replace

–	Connect the Vehicle diagnostic, testing and information system -VAS 5051- or the Vehicle diagnosis and technical information system -VAS 5052- or later equipment → General information; Rep. gr.97 on 16-pin diagnostic connection -T16--arrow-.

–	Turn on the ignition.

–	Turn off all electrical equipment.

–	Proceed by selecting the desired functions → Vehicle diagnostic tester.

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