Ford Programming Tire Sizes

When replacing tire (=circumference changes) most Ford/Mazda/Volvo vehicles require ECU configuration.

On older systems (mainly EEC-V, EEC-VI, Delphi DPC) full PCM flash must be re-programmed. FCOM does not support tire change on these vehicles at this moment.

Newer system (with CCF system) require proper tyre selection in BCM (FCOM -> Connect to BCM -> Configuration).