2024 Alfa Romeo Tonale DTCM Software Update TSB 21-037-24

Alfa Romeo has released Technical Service Bulletin (TSB) 21-037-24 to address specific software-related concerns in the Drivetrain Control Module (DTCM) for the 2024 Alfa Romeo Tonale. This bulletin supersedes TSB 21-026-23, issued on September 2, 2023, and includes revisions highlighted with asterisks.

This 2024 Alfa Romeo Tonale manufacturer_communication aims to improve vehicle performance and prevent diagnostic trouble codes related to the DTCM. The update applies to vehicles equipped with the 9-SPD 948TE FWD/AWD Automatic Transmission (Sales Code DFH).

Symptoms

Owners of affected 2024 Alfa Romeo Tonale vehicles may notice issues related to the All-Wheel Drive (AWD) system. Specifically, there might be no discernible difference when attempting to switch between Auto Mode and Sport Mode, particularly during high-speed maneuvers or in snowy or icy conditions. Technicians performing a Vehicle Scan Report (VSR) may also encounter an Anti-Lock Brake Systems (ABS) code.

Fault Codes / DTCs

When a technician requests a Vehicle Scan Report (VSR), the following specific Diagnostic Trouble Code (DTC) may be present:

• U1767-87: "Drivetrain Control Module Node (DTCM) Drivetrain1 Missing."

Diagnosis / Trigger Conditions

To diagnose the issue, technicians should use a Scan Tool (wiTECH) along with the diagnostic procedures available in DealerCONNECT/Service Library. It is important to verify that all related systems are functioning correctly. Any other Diagnostic Trouble Codes (DTCs) or symptoms not listed in this bulletin should be recorded and addressed before proceeding with the DTCM reprogramming. The presence of the U1767-87 DTC or the described AWD mode switching issue indicates that the vehicle requires this software update.

Important Warnings

CAUTION: During the repair procedure, the removal of fuse F81 is critical. Failure to remove fuse F81 may lead to damage to the Brake Booster Vacuum Pump. Additionally, a battery charger must be connected to maintain voltage between 13.2 and 13.5 volts during the flash process; do not allow the charging voltage to exceed 13.5 volts. If the flash process is interrupted or aborted, it must be restarted from the beginning.

Repair Procedure Summary

The primary repair for this 2024 Alfa Romeo Tonale manufacturer_communication involves updating the DTCM software. The general steps for the technician are as follows:

1. Connect a battery charger to the vehicle to maintain stable voltage throughout the process.
2. Locate the Power Distribution Center (PDC) in the engine compartment and remove the green 30 Amp fuse from cavity F81, which supplies power to the Brake Booster Vacuum Pump.
3. Reprogram the Drivetrain Control Module (DTCM) with the latest available software using the wiTECH Diagnostic Application. Detailed instructions are available within the application's "HELP" tab.
4. Once the reprogramming is complete, reinstall the fuse into cavity F81.
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 present all DTCs after the flash for clearing.

Required Tools or Parts

• wiTECH or Equivalent scan tool
• Battery Charger capable of maintaining 13.2-13.5 volts

Owner Action

If you own a 2024 Alfa Romeo Tonale and experience symptoms such as an ABS warning light, the U1767-87 fault code, or issues with your AWD system not properly switching modes, you should contact your authorized Alfa Romeo dealer. This DTCM software update is reimbursable under the provisions of the vehicle's warranty. The labor time for this specific operation (Labor Operation No: 18-19-07-AP) is estimated at 0.2 hours.

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Source: NHTSA ID: 11001294