If your Autel Ultra/MS909 or other MaxiSys diagnostic scanner displays a “Topology Data Unavailable” error, it usually means the device cannot access the latest vehicle network mapping data. This issue occurs due to expired subscriptions, slow internet, or issue on server side. Below are the common causes and solutions.
Why Does This Error Happen?
- Expired Subscription
- Autel requires an active update subscription to download topology data.
- If your subscription has expired, you’ll…
