Access must be purchased via Mopar Technical Service Portal (MoparTSP) . You generally buy a time-based subscription (3-day, monthly, or annual).
Here's a general overview of the J2534 Flash Application process: chrysler j2534 flash application full
Standard OBD2 scanners read codes and live data. High-end bi-directional scanners can perform adaptations. However, —writing new binary data to a module—requires a J2534-compliant device and the manufacturer's flash software. Here’s why: Access must be purchased via Mopar Technical Service
Under the Clean Air Act, manufacturers were mandated to provide access to emission-related software reprogramming. The Society of Automotive Engineers (SAE) J2534 standard defined the protocol for this access. While initially limited to emission calibrations, Chrysler’s implementation of the "J2534 Flash Application" expanded this scope, offering a "full" suite of capabilities that bridges the gap between dealer-exclusive tools and the independent aftermarket. High-end bi-directional scanners can perform adaptations
A very specific topic!