Engine Component Power Supply Relay - J757-, Checking: General Description
WARNING: This page is about a different car, the 2018 Audi A3 Quattro, 2017 Audi A3 Quattro, 2016 Audi A3 Quattro, 2016 Audi A3, and 2015 Audi A3 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
The following procedure is used to diagnose the Engine Component Power Supply Relay -J757- and the power supply voltage that is provided to the Ignition Coils --.