ATG EPS Mode D'emploi Et Entretien page 13

Power steering parts
If you decide to use an external diagnostic tester you have to plug it to the interface set inside the bench, near to the computer.
In the specific case of Punto 188 ECU 1075 you have to use 'Cable #6'
Using 'EPS testing system' you can apply a load to the Eps under test by means of an electromagnetic brake. You can activate it
clicking over 'ON' button in the 'Brake' box.
ATG - Eps Testing system
You can see the braking torque during the test, select different speed and test the EPS accordingly.