Why would that matter? Adjusting the preload is strictly a mechanical adjustment. No electronics are involved at all. That is silly.
Preload ( yes the mechanical adjustment ) can be set just sitting on the stand. I think he is just reading the manual it really should indicate just key on so the ECU and ESA are online. The engine does not have to be running. This of course would be for setting SAG, which can involve preload so most would just assume key on so ECU and ESA are online working.
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