Always disconnect the battery negative terminal before handling CAN bus connectors. Use ignition OFF when measuring resistance.
Provide them with the full fault log, battery voltage at time of failure, and any other codes (L301, L303, L304) – these help pinpoint which node on the link has gone silent. valtra error code l302 link
to view saved fault code memory (F1) and check specific component functions. Consult Your Dealer : If the tractor is in "limp mode" or won't move, contact a certified Valtra dealer to run a deeper diagnostic using MultiTool software. Does the tractor behave differently battery voltage at time of failure