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Ram DT 2025+ • PROXI (proxy) alignment

Ram DT 2025+ PROXI Alignment (Proxy Alignment)

A practical page for workshops and retrofitters working with newer Ram DT vehicles. After configuration changes, some workflows require a PROXI alignment routine to synchronize modules. FCA PROXI Tool helps on the configuration side: preparing an output file with consistent CRC/checksums so your write-back step is technically correct before any synchronization routine is attempted.

2025+ reality

Why DT 2025+ is different in practice

On newer DT builds, workshops report that changing settings can be possible, but some OEM “final synchronization” routines may be restricted without the right access level/tools. In many retrofit/conversion edits, preserving the Configuration Code lets you avoid relying on that routine.
Common triggers

When alignment topics appear

  • After enabling/disabling equipment options.
  • After retrofits (lighting, infotainment, driver assistance).
  • After replacing a module that participates in the network configuration.
Access

SGW / authorized diagnostics

If your workflow hits write restrictions or alignment failures, it can be related to SGW/AutoAuth requirements. Plan for an authorized path when working on late-model vehicles.
How FCA PROXI Tool fits

Configuration-first workflow

  • Open the exported configuration buffer.
  • Edit bytes/bits only where needed.
  • Keep the original Configuration Code (sync identity) while making changes.
  • Save a checksum-correct output file (CRC recalculated with proprietary logic).
  • Write only to the ECU(s) you changed, then validate.

Quick navigation

What PROXI alignment means on Ram DT

Same idea as other FCA/Stellantis platforms: a BCM-centered configuration map and a synchronization routine so modules agree on installed equipment and behavior.

Data

Configuration map (bytes/bits)

This is the “what the truck is” data: region flags, feature enables, and equipment presence. Editing the map safely means keeping checksums consistent and changing only what you intend.
Procedure

Alignment routine (sync)

This is the scan-tool routine that distributes/validates the configuration across modules. On late-model vehicles, access level and tooling can determine whether it completes successfully.
Search terms

“proxy alignment” is normal

Most owners type “proxy alignment”. FCA terminology is PROXI alignment. Your documentation should include both so people find the right page.

Recommended workflow (Ram DT 2025+)

Goal: keep the configuration technically correct first, then deal with synchronization only if required.

  • Backup: export the original configuration buffer and keep it unchanged.
  • Edit: apply the minimum change set (avoid “shotgun” edits across many bytes).
  • CRC/checksums: generate a checksum-correct output file (FCA PROXI Tool handles this).
  • Write and validate: verify the vehicle’s behavior and DTCs after flashing.
  • Only then: run an alignment routine if the vehicle reports a mismatch state or if your retrofit procedure explicitly requires it.
Note: If your workflow is blocked by access restrictions, you may need an authorized diagnostic route. Plan for this early on DT 2025+ projects.

If “PROXI alignment failed” appears

Treat this as a process problem, not a single magic button.

1

Confirm the configuration is valid

Make sure your output file is checksum-correct and you did not introduce unintended changes. Start by re-reading and comparing buffers against the backup.
2

Confirm access level

Late-model vehicles can restrict operations. If writes or guided routines are blocked, you may need authorized access (SGW/AutoAuth) or OEM tooling for the final sync step.
3

Narrow the change set

When troubleshooting, revert to the smallest possible change and re-test. This helps isolate which byte/bit or feature triggers the mismatch state.
Want the general PROXI overview?
Start from the generic guide and then return to this DT page for 2025+ specifics.
Open PROXI alignment overview

FAQ (Ram DT 2025+)

Does FCA PROXI Tool replace WiTECH for PROXI alignment?
No, it does not replace full diagnostics. FCA PROXI Tool focuses on configuration editing and checksum-correct output, and Direct Connect can read & write supported buffers. It does not run the OEM alignment routine itself. In many workflows, preserving the original Configuration Code and writing checksum-correct data avoids mismatch states, so a separate alignment routine is often unnecessary.
Why do people say DT 2025+ alignment is “hard”?
On late-model vehicles, access restrictions and tooling differences can prevent certain guided routines from completing. In practice, this can make the final sync step harder than on older platforms.
What can I do if alignment fails after a retrofit?
Confirm your edited configuration is valid and checksum-correct, reduce the change set to isolate the trigger, and verify whether an authorized diagnostic route is required for the final sync step.
What should I provide for support on a DT configuration project?
Vehicle details (year/trim), the original exported configuration buffer, and a clear goal. Always keep a clean backup before editing.