2025 Alfa Romeo Tonale Cabin Preconditioning TSB 08-402-25

Owners of certain 2025 Alfa Romeo Tonale vehicles may notice that their vehicle fails to perform scheduled cabin preconditioning. This condition is often accompanied by a specific message on the instrument cluster: "Cabin Preconditioning Unavailable". Technical Service Bulletin (TSB) 08-402-25 has been released to provide a solution for this concern.

This TSB, identified as 08-402-25, applies to 2025 Alfa Romeo Tonale models equipped with a 1.3L I4 DOHC Turbo PHEV Engine (Sales Code EYG) that were built on or before October 20, 2025 (MDH 1020XX). The bulletin specifically targets vehicles sold in the North American market.

Symptoms

The primary symptom reported by customers is the vehicle's inability to perform scheduled cabin preconditioning as planned. When this occurs, drivers will see the explicit message "Cabin Preconditioning Unavailable" displayed. This indicates that the system responsible for preparing the cabin temperature before a scheduled departure is not functioning correctly. This directly relates to the 2025 Alfa Romeo Tonale 'Cabin Preconditioning Unavailable' issue.

Cause

The root cause of the 2025 Alfa Romeo Tonale 'Cabin Preconditioning Unavailable' issue is identified as requiring software updates for the Hybrid Control Processor (HCP) and the Auxiliary Hybrid Control Processor (AHCP). These modules, collectively known as the Power Inverter Module (PIM), require the latest software calibration to ensure proper operation of the cabin preconditioning feature.

Diagnosis

Before performing any repairs, technicians are instructed to use a Scan Tool (specifically wiTECH or equivalent) with the appropriate Diagnostic Procedures available in DealerCONNECT/Service Library. The goal is to verify that all related systems are functioning as designed. If any Diagnostic Trouble Codes (DTCs) or symptom conditions, other than the "Cabin Preconditioning Unavailable" message, are present, these issues must be recorded on the repair order and addressed before proceeding with the TSB.

Required Tools

To perform the necessary software updates, technicians will require a diagnostic scan tool. The bulletin specifically mentions:

• wiTECH or Equivalent

Repair Procedure Summary

The repair outlined in TSB 08-402-25 involves reprogramming the Power Inverter Module (PIM) with the latest available software. This procedure is performed using a wiTECH scan tool or equivalent diagnostic equipment. Before initiating the software flash, technicians must ensure the vehicle's battery voltage is stable by connecting a battery charger. This is crucial to prevent interruptions during the flash process.

During the reprogramming process, if any issues arise or the flash is interrupted/aborted, the procedure must be restarted. After successful reprogramming, any Diagnostic Trouble Codes (DTCs) that may have been set in various modules due to the update process will be automatically presented by the wiTECH application and should be cleared. If issues persist during flashing, technicians are advised to submit a ticket to the Helpdesk found within the wiTECH Diagnostic Application.

Important Warnings

This Technical Service Bulletin includes several critical warnings for technicians to ensure safety and proper procedure execution, especially given the high-voltage components in hybrid vehicles:

• "Before performing the software reprogramming, it is necessary to make the vehicle safe."
• "When performing repairs that directly involve or imply possible contact with live high voltage components/systems, the technician must ensure that the power supply of the high-voltage system is disconnected throughout the operation."
• "Only specifically trained technicians qualified to perform repairs on vehicles with high voltage systems under current national laws/regulations are authorized to work on the vehicle."
• "Before performing any diagnostic repair work on the vehicle, carefully read and comply with the general instructions for working safely on hybrid/electric vehicles and use suitable general equipment and Personal Protective Equipment (PPE)."
• "The vehicle must not be connected to a high voltage charger when performing software updates."
• "Install a battery charger to ensure sufficient battery voltage is provided during the flash process."
• "If this flash process is interrupted/aborted, the flash should be restarted."

Warranty Information

The repair described in TSB 08-402-25 is reimbursable within the provisions of the vehicle's warranty. Dealers should use the following claims data:

• Labor Operation No: 18-19-86-BM
• Labor Description: Processor, Hybrid Control (AHCP/HCP/PIM) - Reprogram (0 - Introduction)
• Skill Category: 1 - Engine Repair And Performance
• Labor Time: 0.5 Hrs.
• Failure Code: CC (Customer Concern)

When using failure code CC, the 3C's (customer's concern, cause, and correction) must be provided for processing Technical Service Bulletin flash/reprogramming conditions.

NHTSA ID: 11026681