A practical page for workshops working on the Maserati Grecale. People often search “proxy alignment” when a vehicle shows configuration mismatch behavior after retrofits or module replacement. FCA PROXI Tool focuses on the configuration itself: load the exported buffer, edit bytes/bits, and save an output file with consistent CRC/checksums so your write-back step stays technically correct. FCA PROXI Tool preserves the original Configuration Code, recalculates CRC/checksums and writes the required ECUs, so the vehicle accepts the edited buffer without a mismatch state and no separate alignment routine is required.After FCA PROXI Tool writes the configuration, a separate PROXI alignment routine is never required.
Common triggers
When Grecale projects hit alignment issues
Retrofits where the car detects a mismatch (options/features changed).
Module replacement followed by “not configured / not aligned” states.
Market/region coding or behavior changes that require configuration edits.
Common symptoms
What owners and shops search for
“proxy alignment” / “proxi alignment” in scan tool menus.
After-coding issues where features behave incorrectly until modules agree.
Platform note
Maserati Grecale - platform note
The Grecale is a Maserati built on a PROXI-configured platform. After retrofits or module replacement the BCM configuration can drift from the modules, which is what triggers a PROXI mismatch - read the configuration, correct it, and write it back with a checksum-correct file.
How FCA PROXI Tool fits
Configuration-first workflow
FCA PROXI Tool automatically creates and preserves an untouched backup of the original configuration when it is read; no manual backup step or prompt is required.
Edit bytes/bits with Standard / Advanced / PROXI Map Editor.
Save a checksum-correct output file (CRC/checksums recalculated).
Write back directly from FCA PROXI Tool over your ELM327 or J2534 adapter, then verify the result; no separate PROXI alignment routine is required.
The term gets used as a catch-all for “configuration mismatch”. Split it into two parts: the configuration data and the sync step that makes all modules accept the same map.
Important: FCA PROXI Tool preserves the original Configuration Code, recalculates CRC/checksums and writes the required ECUs directly. The result stays synchronized, so no separate network alignment routine is required.
Definition
Configuration map vs alignment routine
The configuration map defines installed equipment and logic flags. The alignment routine is the sync/distribution step that forces agreement across modules.
Goal
Keep edits targeted and checksum-correct
Most problems come from mismatched expectations between modules. Editing only what you must and keeping checksums correct reduces mismatch risk after a write.
Terminology
“Proxy” vs “PROXI”
You may see the term written as “proxy alignment” in workshop notes. FCA terminology uses PROXI alignment; both spellings refer to the same synchronization procedure.
Recommended workshop workflow
A conservative approach for configuration changes and retrofit work.
Automatic backup: FCA PROXI Tool automatically creates and preserves an untouched backup of the original configuration when it is read; no manual backup step or prompt is required.
Edit with intent: change only required bytes/bits, document your changes.
Save correct output: ensure CRC/checksums are recalculated.
Write back: complete the write using your shop workflow.
Write and verify: FCA PROXI Tool preserves the Configuration Code and writes checksum-correct data, so no separate alignment/sync step is required.
Common failure modes (what usually goes wrong)
Most “alignment failed” reports fall into one of these categories. Diagnose the cause before re-trying the same write.
Mismatch
Configuration changed but modules disagree
If one module accepts a configuration that another rejects, you will see mismatch symptoms. Verify your intended change and keep edits minimal.
Access
Write blocked / restricted
On newer vehicles, SGW or security policy can restrict the write itself. Use an authorized session to complete the targeted write; FCA PROXI Tool requires no synchronization step afterward.
Inputs
No clean baseline
If you do not have the untouched original buffer, it becomes harder to isolate what change caused the mismatch. Always start by backing up before edits.
Access notes
SGW
Maserati Grecale SGW access & requirements
If a write is rejected, this page explains typical SGW/gateway limitations and what you need for an authorized diagnostic session (safe, workshop-friendly workflow).
If a write is rejected, use a practical checklist: access/session authorization, stable power, adapter/bus stability, correct ECU targeting, and checksum-correct output (keep Configuration Code).
Does this guide apply to all Grecale trims and model years?
In general yes - the PROXI configuration workflow is the same across Grecale trims and model years. Always confirm the exact configuration by VIN before writing, since module sets and parameters can differ.
Is “proxy alignment” the same as PROXI alignment?
Yes. “Proxy alignment” is a common search term, while FCA documentation typically uses the term PROXI alignment.
What do you need for configuration editing work?
Vehicle details and a clear target change are enough to begin. FCA PROXI Tool automatically creates and preserves an untouched backup of the original configuration when it is read; no manual backup step or prompt is required.
Why do some operations fail even with a correct file?
Write access can be restricted on newer platforms depending on the module and security level. Use authorized access to complete the targeted write; no separate synchronization step follows an FCA PROXI Tool write.
Get FCA PROXI Tool
Direct vehicle connection, full diagnostics and PROXI configuration in one application — with no separate alignment after writing. Annual subscription: $500.
