No warranty — use at your own risk

No warranty

q4t is provided without warranty to the maximum extent permitted by applicable law. This includes no warranty that the software is suitable, safe, compatible, complete, accurate or fit for a particular motorcycle, ECU, module, adapter or purpose.

Sections 15 and 16 of the GNU AGPL v3 provide the applicable disclaimer of warranty and limitation of liability for AGPL-licensed q4t software, in each case only to the extent permitted by applicable law. Nothing on this site claims to exclude or limit liability that applicable law does not permit to be excluded or limited.

User responsibility

You are responsible for deciding whether to connect q4t to a vehicle, for confirming vehicle/module compatibility, for selecting and supervising each operation, for maintaining recoverable records/backups where possible, and for the consequences of commands you authorize.

Diagnostic and state-changing operations can produce unintended results, corrupt persistent data, leave a control module unavailable, erase diagnostic evidence, or require professional recovery, reprogramming, repair, or replacement.

Safety controls are not guarantees

Read-only defaults, write gates, confirmations, voltage checks, operation classification, logging and response validation reduce accidental use. They cannot guarantee compatibility, successful completion, data recovery or freedom from damage.

Vehicle safety

Never use q4t while riding or while the motorcycle can move unexpectedly. Secure the motorcycle, follow Neutral/engine/ignition instructions, maintain stable electrical power when required, and do not disconnect the diagnostic interface during an active state-changing operation unless the workflow explicitly instructs you to do so.