Connect without the hand-off
Read and write supported configuration directly over ELM327-compatible or J2534 PassThru hardware. File import and export remain available when you need them.
FCA PROXI Tool · Professional FCA / Stellantis workspace
Diagnose.
Configure.
Verify.
One Windows tool for the complete configuration loop: connect to the vehicle, identify the exact platform, edit named PROXI parameters, diagnose every module, write back and verify the result — no separate PROXI alignment required.
ELM327 / J2534
Direct vehicle connection
Windows
Built for workshop PCs
$500 / year
One subscription · one PC
No PROXI alignment
Write back without a separate alignment pass
One workspace
from connection to proof
from connection to proof
Named configurationFactory-derived Fast Parameters
Whole-vehicle diagnosticsDTCs, topology and freeze-frame
EOL decodingRejection reasons by parameter name
No PROXI alignment requiredInternally consistent write-back
The workflow, finally connected
One vehicle.
Too many disconnected tools.
Change the parameter you actually mean
Work with named values for the detected platform and body instead of treating every task as a blind byte hunt. Advanced byte and bit editing stays one click away.
Understand why the vehicle refused a write
Scan modules, inspect topology and translate EOL rejection data into parameter-level clues — without moving the job into another application.
The differentiator
A raw rejection code is not a repair plan.
When a supported module rejects configuration, FCA PROXI Tool connects the EOL response to the relevant parameter name. You get a direction for the next check instead of stopping at an opaque code.
EOL response analysis
Vehicle context active
Module
Response received from vehicle
Input
EOL reason
Supported rejection data decoded
Mapped
Parameter
Relevant configuration name surfaced
Actionable
Vehicle-aware by design
The right context before you change a single bit.
FCA PROXI Tool reads the vehicle first, then builds the workspace around its real platform, body and module set. That context carries through editing, diagnostics and write-back.
Named Fast Parameters from the factory database
Select human-readable values mapped to the correct bytes and bits for the detected platform. Make focused changes without disturbing neighbouring configuration.
Whole-vehicle diagnostics
Scan the modules present, read and clear DTCs, inspect freeze-frame data and view the network topology in the same working session.
Direct vehicle access
Run the read → edit → write loop through ELM327-compatible adapters or J2534 PassThru devices. CAN-FD is available with compatible hardware.
Automatic platform and body detection
The tool reads BCM configuration on connection and resolves the factory Vehicle_Line context automatically. Manual selection remains available.
Integrity and rejection analysis built into the loop
Recalculate CRC on the server, compare configurations and decode EOL rejection reasons by parameter name. The result is a traceable change, not a hopeful write.
Inside the workspace
From named parameters to raw bytes — without losing the vehicle.
Choose the level of control the job needs. The same configuration stays active as you move between guided editing, advanced analysis, diagnostics and vehicle history.
Workspace modules
A repeatable workshop loop
Connect. Understand. Change. Prove.
Every stage stays anchored to the same vehicle and configuration. The software automatically preserves an untouched original, so you can make a deliberate change and verify what the car reports after write-back.
Connect
Select ELM327 or J2534, establish communication and let the tool read the vehicle context and module set.
Understand
Review diagnostics, current configuration, platform-specific parameters and the automatically created original backup before touching the car.
Change
Edit named parameters or work at byte and bit level. Compare buffers and recalculate the required checksum.
Verify
Write the corrected configuration, rescan the modules and use status or EOL data to confirm the result.
Built around real jobs
Not a demo database. A working tool for the bay.
Use the same core workflow for market conversions, retrofits, configuration mismatch analysis and module-level fault investigation.
Market configuration
US ↔ EU conversion work
Edit supported region, language, lighting and market parameters; combine the configuration work with dedicated head-unit conversion solutions where required.
Configuration sync
Retrofit and mismatch troubleshooting
Read the original state, make a controlled configuration change and write back an internally consistent result without running a separate PROXI alignment procedure.
Whole-vehicle scan
Fault investigation
Read DTCs across the module set, inspect freeze-frame and topology, then connect the diagnostic result to the configuration you are editing.
Write access
SGW and rejection analysis
Distinguish blocked access from a data problem, inspect gateway state and decode supported EOL rejection reasons down to the relevant parameter.
Vehicle coverage overview
Three support tiers. One exact directory.
This is a compact overview of the main, modern CAN FD and experimental tiers. The full vehicle directory contains the exact model and body list.
Chrysler200 ↗
DodgeDart · Hornet · Neon · modern profiles ↗
JeepCherokee · Grand Cherokee · Commander · Compass · Wagoneer ↗
RAM1500 · HD / Chassis Cab · 1000 · Rampage · ProMaster ↗
Fiat500 family · Argo · Cronos · Pulse · Toro · Ducato MCA ↗
Alfa Romeo4C · Giulia · Giulietta · Stelvio · Tonale ↗
Modern CAN FDJeep · RAM · Hornet · Tonale · Grecale · Atlantis High ↗
Experimental profilesSelected Maserati · Iveco · Ferrari ↗
Straightforward annual access
One annual subscription. The complete tool.
No tiers to decode and no core feature held back. The $500 annual subscription includes Direct Connect, diagnostics, named parameters, advanced editing and product updates during the active term for one workshop PC.
Annual subscription
$500
- 12 months of full access
- No per-VIN fee
- All product modules included
- Setup support included
Before you connect
Clear answers. No sales fog.
Compatibility still depends on the exact vehicle, network and hardware. Send the model, year and intended job before purchase if you need confirmation.
Is this an editor or a diagnostic application?
Both capabilities live in one workspace. FCA PROXI Tool edits PROXI / CDA configuration and also scans the vehicle, reads and clears DTCs, shows freeze-frame and topology, and decodes supported EOL rejection reasons. It does not replace OEM software for guided procedures, ECU flashing, calibrations or every manufacturer-specific routine.
Do I need to run PROXI alignment afterward?
No. FCA PROXI Tool prepares and writes an internally consistent configuration, so a separate PROXI alignment pass is not required after write-back. This is a core part of the product workflow, not an additional paid module or external step.
Which adapter do I need?
Use a supported ELM327-compatible adapter or J2534 PassThru device. Newer CAN-FD modules require FD-capable hardware and drivers. Adapter quality, network access and Security Gateway state can affect what is available on a specific vehicle.
Will it work with my model and year?
Main coverage includes Chrysler, Dodge, Jeep, RAM, Fiat and Alfa Romeo model families, with dedicated modern CAN FD profiles for current Jeep, RAM, Dodge, Alfa Romeo, Maserati and Atlantis High platforms. Maserati Grecale M182 / M189 is supported and is not experimental. Experimental coverage applies to Maserati Quattroporte, GranTurismo, GranCabrio and M338, plus Iveco and Ferrari. Ferrari has no named vehicle database, so its configuration work is limited to Advanced HEX Byte Edit mode. See the complete vehicle directory for the exact model and body list.
Does the tool require internet access?
Yes. An active connection is required for license authorization and server-backed CRC / checksum recalculation. Vehicle communication itself still happens through your local adapter.
How does licensing work?
The complete tool costs $500 USD per year. The annual subscription provides 12 months of access, is hardware-bound to one PC and has no per-file or per-VIN fee. Initial activation and setup are handled with you through WhatsApp or Telegram.
Latest public release
v1.7.0.0
- J2534 05.00 and expanded CAN FD transport
- Broader diagnostics, smarter routing and faster EOL
- Reworked Compare, operation center and Garage sync
Current Windows build
Put the whole configuration loop on one screen.
Download the application, connect your supported adapter and inspect the workspace before activation. For compatibility or licensing, contact the developer directly.