2024 Alfa Romeo Tonale DPIM Software Update TSB 08-400-25

Owners of 2024 Alfa Romeo Tonale vehicles equipped with the 1.3L I4 DOHC Turbo PHEV Engine (Sales Code EYG) may experience a Malfunction Indicator Lamp (MIL) illumination. This issue, along with specific diagnostic trouble codes (DTCs), indicates a problem with the Dual Power Invertor Module (DPIM) that requires a software update.

Technical Service Bulletin (TSB) 08-400-25, issued on December 23, 2025, outlines the procedure for inspecting and potentially reprogramming the DPIM with the latest available software. This TSB supersedes a previous bulletin, 08-400-25, dated December 12, 2025, and has also been released as Rapid Service Update (RSU) 24-153.

Symptoms

Customers may notice a Malfunction Indicator Lamp (MIL) illuminated on the dashboard. In addition to the MIL, the 2024 Alfa Romeo Tonale DPIM update issue can manifest with the following symptoms:

• The vehicle not performing a scheduled cabin preconditioning.
• A "Cabin Preconditioning Unavailable" message displayed when scheduled cabin conditions are not met.

Fault Codes / DTCs

When diagnosing the issue, technicians may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the vehicle's system:

Code	Description	Module
P2601-00	Electric Coolant Pump Control Circuit Performance Stuck Off	Hybrid Control Processor (HCP)
U0623-00	Lost Communication With Coolant Pump "A"	Hybrid Control Processor (HCP)
P1DBA	Battery Cooling System Failure (Module, Hybrid Control Processor)	Hybrid Control Processor (HCP)

Cause

The root cause of these symptoms and DTCs is related to the Dual Power Invertor Module (DPIM) software. The 2024 Alfa Romeo Tonale DPIM update is necessary to address these software-related issues.

Important Warnings

Performing software reprogramming on hybrid/electric vehicles involves working with high-voltage components. It is crucial to observe strict safety precautions:

• Before any software reprogramming, the vehicle must be made safe, and the power supply of the high-voltage system must be disconnected throughout the operation.
• Only specifically trained technicians qualified to perform repairs on high-voltage systems should work on the vehicle.
• Do not connect the vehicle to a high-voltage charger when performing software updates.
• Always install a battery charger to ensure sufficient battery voltage during the flash process. If the flash process is interrupted, it should be restarted.

Repair Procedure Summary

The repair for the 2024 Alfa Romeo Tonale DPIM update involves inspecting and potentially reprogramming the Dual Power Invertor Module (DPIM), specifically the AHCP and HCP, with the latest available software. The general steps are:

1. Verify if the vehicle is on the Rapid Service Update (RSU) VIN list. If so, proceed with the update.
2. Check if the DPIM (AHCP/HCP) is already at the latest software level. If not, proceed to reprogramming.
3. Reprogram the AHCP with the latest available software using the wiTECH Diagnostic Application. If issues arise during flashing, a ticket should be submitted to the Helpdesk.
4. Reprogram the HCP with the latest available software, following the same procedure as the AHCP.
5. Clear any Diagnostic Trouble Codes (DTCs) that may have been set in any modules due to the reprogramming process. The wiTECH application will automatically assist with this step.

No parts are required to be replaced for vehicles exhibiting DTCs P2601 and U0623 before or after the software update.

Required Tools

Technicians will need a Scan Tool (wiTECH) or an equivalent diagnostic tool to perform the necessary software updates and diagnostics.

Owner Action

If your 2024 Alfa Romeo Tonale is experiencing MIL illumination, displaying a "Cabin Preconditioning Unavailable" message, or exhibiting any of the symptoms described, you should contact your authorized Alfa Romeo dealer. Refer to TSB 08-400-25 when discussing the issue with the service department. All repairs related to this bulletin are reimbursable under warranty provisions.

NHTSA ID: 11027234