2023-2024 Alfa Romeo Tonale / Dodge Hornet TSR Incorrect Speed Limit

Owners of 2023-2024 Alfa Romeo Tonale and Dodge Hornet vehicles may encounter an issue where the Traffic Sign Recognition (TSR) system displays an incorrect speed limit or consistently shows "No Speed Limit" on the instrument cluster. For instance, the system might erroneously display "100 MPH" when the actual speed limit is different, or fail to show any speed limit information at all. This problem with the Alfa Romeo Tonale TSR incorrect speed limit can be a nuisance for drivers relying on this feature.

This concern is documented in STAR Online Publication S2408000120, which provides guidance for technicians on how to diagnose and resolve the display anomaly. It's important to note that this specific symptom typically does not trigger any Diagnostic Trouble Codes (DTCs) within the TSR system itself.

Symptoms of Incorrect TSR Display

The primary symptom is the Traffic Sign Recognition (TSR) system providing inaccurate or missing speed limit information. Owners might observe the following on their vehicle's display:

• The system displays an "Incorrect Speed Limit," such as a constant "100 MPH," regardless of the actual road conditions.
• The display consistently shows "No Speed Limit" at all times, failing to recognize and display any traffic signs.

Diagnosis and Initial Steps

When addressing the Alfa Romeo Tonale TSR incorrect speed limit, technicians are advised to first ensure that several key modules have the latest software updates. These modules include the Haptic Lane Feedback (HALF), the Driver Assist System Module (DASM), and the Instrument Panel Cluster (IPC).

If any Diagnostic Trouble Codes (DTCs) are present in these or other modules that could potentially affect the TSR system, those DTCs should be diagnosed and resolved before proceeding with further steps outlined in STAR Online Publication S2408000120. This ensures that underlying electrical or communication issues are addressed first.

Repair Procedure Summary

If the TSR display issue persists after software updates and no related DTCs are found, technicians should perform a specific sequence of actions using the wiTECH diagnostic tool. This procedure aims to recalibrate and reset the affected systems:

1. Reset Park Assist Module (PAM): Using wiTECH's Guided Diagnostics, the technician will select the "Reset ECU" function and perform a reset of the Park Assist Module (PAM). This step helps clear any potential glitches within this module that might indirectly affect other vehicle systems.
2. Restore Vehicle Configuration: The next step involves accessing either the Body Control Module (BCM) Misc Functions tab or the Vehicle Preparations section within wiTECH. From there, the technician will execute the "Restore Vehicle Configuration" routine. This process helps re-establish the correct communication and configuration settings across various vehicle modules.
3. Perform PROXI Alignment: Finally, a PROXI alignment procedure must be performed. PROXI alignment is crucial for configuring and synchronizing electronic modules within the vehicle's network. After the alignment is completed, the vehicle should be allowed to enter a 'sleep' state to finalize the process.

Important Information for Owners

It is crucial for owners to understand the nature of this communication. STAR Online Publication S2408000120 is a record of past experiences and provides guidance to technicians; it does not authorize warranty repairs for this specific issue. This means that the resolution of the Alfa Romeo Tonale TSR incorrect speed limit issue may not automatically be covered under warranty, and the vehicle owner might be responsible for diagnostic and repair costs.

This document does not provide a definitive conclusion about the root cause of the problem but rather offers a known solution based on similar reported cases. Owners should consult with their dealership for a proper diagnosis and to discuss potential costs.

Verification

After completing the repair steps, the vehicle must be test-driven in an area where the windshield-mounted camera can easily read traffic signs. The technician will then confirm that the Traffic Sign Recognition (TSR) system now accurately displays the correct speed limit or traffic signs, resolving the Alfa Romeo Tonale TSR incorrect speed limit problem.

Source: NHTSA ID: 11010692