ATG - Eps Testing system Mode D'emploi Et Entretien page 18

Power steering parts
You can decide to use an external diagnostic tester (for example Texa, Bosh, Brain Bee), in this case you have to click over
'Internal/External diagnose'.
'Calibration' box will be disabled and the external tester will be enabled.
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 Golf V you have to use 'Cable #6'
ATG - Eps Testing system