EcuFlash is a Windows application used to read, edit, and reprogram engine control units (ECUs),
most commonly Subaru and Mitsubishi. With a Tactrix OpenPort 2.0 (J2534) and the correct ROM
definitions, you can open stock ROMs, apply calibrated changes, and reflash securely. The UI is clean:
a left panel for Open ROM Documents, a middle metadata panel, and a live Task Info log that
shows libraries, checksum modules, and protocol loaders in real time.



Core workflow

• Read/Write ECUs through OpenPort 2.0 with model-specific methods (e.g., mitsukernel, mitsucan,
  subarucan, sti05, wrx02). The Task Log confirms which flashing/patch modules are loaded.
• ROM Editing via definition files (“ROM metadata”), mapping tables and scalars into human-readable
  names and units for safe, repeatable changes.
• Metadata View shows CPU family, memory size/model, checksums, editor version, and definition
  source—useful for documentation and audits.
• Logging support when enabled by a definition/patch (e.g., Subaru/Mitsubishi RAM parameter logging).

Vehicle/ROM browser

• Filter by make / market / model / year and see the flash method(s), memory model, and
  ROM size before you connect—handy for planning read/write strategy.
• Definition sets cover popular Subaru (WRX/STI/FXT, BRZ, CAN/Hitachi) and Mitsubishi (EVO, Lancer,
  Outlander) ECUs.

Options → fine control

• Directories: set ROM, Log, Color Map, and Metadata folders.
• Files: MRU ROM entries, Default Vehicle.
• Appearance: default color map for table visualization.
• Metadata: User Level (show beginner/advanced tables), Show Invalid Tables, Show Invalid Leaf
  Tables, Show Tables Beyond User Level, Prefix Table Names With Address, and Sort Tables by
  Address—ideal for power users who audit definitions.

J2534 & drivers

• Works with the Tactrix OpenPort 2.0 J2534 interface. Install its driver package before first use.
• You may verify your interface stack with a simple J2534 tester (device, firmware, DLL/API version).

Typical use cases

• Create a clean backup of a stock ROM, apply calibrated changes, and reflash.
• Confirm definition coverage and memory model before bench/OBD work.
• Track every step with the Task Log for a transparent workshop record.

Compatibility & Minimum Requirements

• Tested on Windows 10 LTSC (2019); also runs on Windows 7/8/10/11 (32/64-bit).
• CPU: dual-core or better • RAM: 2 GB+ • Storage: 200 MB+ (more for ROM packs/logs).
• Requires USB drivers for OpenPort 2.0; keep .NET/VC++ runtimes up to date.

Disclaimer
This post summarizes features visible in the application and public documentation for educational
purposes. Files and links referenced here are indexed from public locations and may be shared by
third parties our forum does not host or modify them. Always use software and vehicle data you are
authorized to service, and follow all applicable licenses and laws.

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