1. Pair the dongle
Plug the dongle into the port under the dash. Key on, engine off. On the RO, tap Connect dongle and pick it from the list.
2. Run a scan
Tap Full-system scan and keep the key on until it finishes, about a minute. Read codes is the quick read of the engine and transmission.
3. Get the verdict
Tap Run quick diagnosis. AceDx gives you the likely cause, how sure it is, the evidence, and two other causes to rule out. Fix it, retest, then Confirm fix & close RO.
4. Invite a teammate
Owners: open Team, tap + Invite, enter their email and pick a role. They get an email to set up their login.