I just tried also, as I kept forgetting about this until you brought it up today. I get the same thing as you. It’s definitely the calibration fault keeping the center line from showing up. When connected to the CVPM, I can run 8502 in the manual request section, which suppresses all faults in the CVPM during the diagnostic session, and the center line and adjustment soft key immediately shows up. I’ll send off the debug log.
When I send the debug log, I’ll ask him about this, along with some other requests, such as adding the ability to enable pin F37 on the BCM for the trailer hitch light.
How do you force the run? I'm in manual connect but I'm not really getting anywhere.