2024 Alfa Romeo Tonale DASM Software Update TSB

Owners of the 2024 Alfa Romeo Tonale equipped with Full Speed Fwd Collision Warn Plus (Sales Code LSU) may experience various driver assistance system malfunctions. These can include a Malfunction Indicator Lamp (MIL) illumination, specific diagnostic trouble codes (DTCs), and warning messages displayed on the instrument cluster. This bulletin, TSB 08-294-25, revision 08-060-24, issued on September 4, 2025, provides a software update solution for the Driver Assist System Module (DASM), HALF module, and Instrument Panel Cluster (IPC).

This TSB 08-294-25 supersedes Technical Service Bulletin (TSB) 08-060-24, which was dated February 28, 2024. It has also been released as Rapid Service Update (RSU) 24-040. All applicable RSU VINs have been loaded, and repairs are reimbursable under warranty provisions.

Symptoms

Owners may notice a Malfunction Indicator Lamp (MIL) illumination on their dashboard. In addition to the MIL, customers might report specific warning messages or vehicle behaviors related to the driver assistance systems. These include:

• "ACC not available" message displayed on the Instrument Panel Cluster (IPC).
• "Highway Assist not available" message displayed on the IPC.
• Highway Assist steering wheel vibration.

Fault Codes / DTCs

Technicians investigating these symptoms will likely find the following Diagnostic Trouble Code (DTC) stored:

Code	Description	Module
C1409-97	Radar Sensor Blind - Component Or System Operation Obstructed Or Blocked	DASM

Diagnosis and Trigger Conditions

The root cause of these issues is identified as module software that requires updating. To diagnose the problem, a technician will use a wiTECH scan tool to verify that all related systems are functioning correctly. If the customer's concern matches the symptoms listed above and the DTC C1409-97 is present, the vehicle is a candidate for the software update outlined in TSB 08-294-25.

Important Warnings and Advisories

Several critical warnings and advisories must be followed during this repair to ensure safety and prevent damage:

• High-Voltage Safety: Before performing any software reprogramming or repairs involving high-voltage components, the vehicle must be made safe. Only specifically trained and qualified technicians are authorized to work on high-voltage systems, ensuring the power supply is disconnected and appropriate Personal Protective Equipment (PPE) is used.
• Radar Sensor Obstruction: Technicians must inspect the front radar and fascia for any mud, dirt, or obstructions that could affect radar function. The front fascia should be cleaned, and any aftermarket components influencing radar function must be removed.
• Battery Voltage: A battery charger must be installed to maintain battery voltage between 13.2 and 13.5 volts during the flash process. Voltage outside this range can cause issues.
• Interrupted Flash: If the software flash process is interrupted or aborted, it must be restarted.
• Brake Booster Vacuum Pump Fuse: Removal of the 30 Amp fuse for the Brake Booster Vacuum Pump from the Power Distribution Center (PDC) is mandatory for this repair. Failure to remove this fuse may result in damage to the Brake Booster Vacuum Pump.
• SA Market Note: For vehicles in the SA (South America) market only, after applying this TSB, it is not necessary to send DID-I or DID-A data.

Repair Procedure Summary

The repair involves inspecting and potentially updating the software for the Driver Assist System Module (DASM), HALF module, and Instrument Panel Cluster (IPC). The general steps are as follows:

1. Inspect the current software level of the DASM. If an update is needed, reprogram the DASM with the latest software. This step requires removing the 30 Amp fuse for the Brake Booster Vacuum Pump.
2. After the DASM programming, wait two minutes.
3. Determine if the vehicle is a PHEV (build date on or before August 08, 2023) or ICE (build date on or before December 07, 2023).
4. Inspect the current software level of the HALF module. If an update is needed, reprogram the HALF module with the latest software.
5. After the HALF module programming, wait two minutes.
6. Inspect the current software level of the IPC. If an update is needed, reprogram the IPC with the latest software.
7. After the IPC programming, wait two minutes.
8. Cycle the ignition to the OFF position, allow the vehicle and modules to go to sleep for two minutes, then cycle the ignition to the RUN position.
9. Reinstall the 30 Amp fuse for the Brake Booster Vacuum Pump.
10. Perform a "PROXI Alignment Procedure" using wiTECH, found under the 'Vehicle Preparations' tab.
11. Clear any Diagnostic Trouble Codes (DTCs) that may have been set in any modules due to the reprogramming.

Required Tools and Parts

The primary tool required for this repair is a wiTECH diagnostic scan tool or an equivalent system capable of performing module reprogramming and PROXI Alignment procedures.

Owner Action and Warranty

If your 2024 Alfa Romeo Tonale is experiencing a Malfunction Indicator Lamp (MIL) illumination, displaying messages like "ACC not available" or "Highway Assist not available", or exhibiting Highway Assist steering wheel vibration, you should contact your authorized Alfa Romeo dealership. Mentioning TSB 08-294-25 and the DTC C1409-97 can help expedite the diagnostic process. This repair is reimbursable within the provisions of your vehicle's warranty.

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Source: NHTSA ID: 11023067