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Jeep Grand Cherokee WL • PROXI (proxy) alignment

Jeep Grand Cherokee WL PROXI Alignment (Proxy Alignment)

A model-focused guide for workshops working on the WL platform. PROXI alignment is the OEM synchronization routine that makes modules agree on the vehicle configuration map. FCA PROXI Tool focuses on the configuration itself: loading the exported buffer, editing bytes/bits, and saving an output file with consistent CRC/checksums so your write-back workflow stays clean.

Common triggers

When WL usually needs attention

  • Retrofits (radio/cluster/ADAS options) where the vehicle detects a configuration mismatch.
  • Module replacement (BCM/cluster/infotainment) followed by a mismatch state.
  • Market coding / feature activation projects where configuration bytes change.
Common symptoms

What users search for

  • Flashing / blinking odometer (a common sign of configuration mismatch on many FCA platforms).
  • “proxy alignment” / “proxi alignment” terms in scan-tool menus or fault descriptions.
  • Multiple modules reporting “configuration not programmed / not aligned”.
Reality check

SGW / access on newer platforms

On newer Stellantis platforms, write access may depend on authorized diagnostic access (SGW/AutoAuth). If your adapter or account cannot perform a write or final synchronization, you may need an authorized workflow (dealer or approved access).
How FCA PROXI Tool fits

Configuration-first workflow

  • Open an exported WL configuration buffer.
  • Edit bytes/bits with Standard / Advanced / PROXI Map Editor.
  • Keep the original Configuration Code (sync identity) while changing only what you need.
  • Save a consistent output file with recalculated CRC/checksums (our proprietary logic).
  • Write only to the ECU(s) that require the change, then validate.

Quick navigation

What “PROXI alignment” means on the WL platform

People use the term in two ways: (1) the configuration data stored in the BCM (the “feature map”), and (2) the alignment procedure that synchronizes that data across modules. Your workflow decides which one you actually need.

Definition

Configuration map vs alignment routine

The configuration map defines equipment and behavior (options, region settings, logic flags). The alignment routine is a diagnostic step that distributes the currently accepted map so modules agree on what is installed.
Goal

Avoid creating a mismatch state

If your workflow preserves the vehicle’s configuration identity while changing only the needed bytes (and your output is checksum-correct), the vehicle often stays consistent after flashing. That reduces the cases where a separate alignment routine becomes necessary.
Keyword

“Proxy” vs “PROXI”

Most people type “proxy alignment”. FCA terminology is PROXI alignment. Use both terms in documentation and search, but keep the technical meaning the same.

Recommended workshop workflow (WL)

A conservative workflow that minimizes surprises and protects the vehicle configuration.

  • Power stability: keep the vehicle on a stable supply during reads/writes.
  • Backup first: read/export the original configuration buffer and save it untouched.
  • Edit intentionally: change only the bytes/bits required for the goal (retrofit / region / option).
  • Recalculate CRC: save a checksum-correct output file (this is where FCA PROXI Tool helps).
  • Write back: use Direct Connect / PassThru / your diagnostic workflow, then verify behavior and DTCs.
Tip: If you are doing a market conversion or a retrofit, also check Conversion solutions for ready-made files/instructions when available.

When you may need a PROXI alignment routine (and when you don’t)

FCA PROXI Tool can write configuration and produce a checksum-correct output while keeping the original Configuration Code. In most retrofit/conversion edits, that means you can write only to the needed ECU(s) and the vehicle stays “consistent” (no forced mismatch state). A separate alignment routine is mainly relevant in edge cases where the vehicle’s configuration identity changes or the network expects a full re-sync.

Identity changed

Configuration Code was replaced/changed

If the vehicle’s configuration identity changed (for example, a buffer from another vehicle or a workflow that alters the Configuration Code), modules can disagree and the car may demand a network synchronization step.
Major module swap

BCM / cluster / infotainment replaced with different identity

Replacing key modules can introduce a different “approved” configuration identity. In those situations, you may need an OEM/aftermarket sync routine to make the network accept a single truth.
Already in mismatch

The vehicle is already in a mismatch state

If the car is already blinking the odometer / showing mismatch DTCs due to identity disagreement, fix the configuration cause first and then use a sync routine only if the vehicle still insists.
Need the general PROXI guide?
Start with the overview and then jump into WL-specific details.
Open PROXI Alignment Guide

FAQ (WL)

Can FCA PROXI Tool perform PROXI alignment on a Jeep Grand Cherokee WL?
FCA PROXI Tool works configuration-first: it can read & write supported configuration buffers (Direct Connect) and produces checksum-correct output. It does not implement the OEM “PROXI alignment” routine as a separate dealer procedure. In many workflows, keeping the original Configuration Code and writing checksum-correct data avoids mismatch states, so a separate alignment routine is often unnecessary.
Why does the odometer flash on WL?
On many FCA platforms, a flashing/blinking odometer is commonly associated with a configuration mismatch or a module that is not aligned with the vehicle’s accepted configuration. Diagnose the underlying mismatch first, then decide whether a synchronization routine is required.
Do WL vehicles always require SGW/AutoAuth?
Write access on newer Stellantis platforms can be restricted. Whether you need authorized access depends on model year, region, and the type of operation. If your tool/adapter cannot complete a write or the vehicle rejects the operation, an authorized workflow may be required.
What should I provide to get help with a WL configuration project?
At minimum: vehicle details (year/model), the original exported configuration buffer, and a clear goal (retrofit, region change, feature behavior). The safest approach is always to keep a clean backup of the original file.