2025 Jeep Wrangler DASM Software Update TSB 08-004-26

Jeep has released Technical Service Bulletin (TSB) 08-004-26 REV. A, also identified as Rapid Service Update (RSU) 26-017, to address software-related concerns with the Driver Assistant System Module (DASM) in certain 2025 Jeep Wrangler vehicles. This bulletin, issued on January 31, 2026, supersedes the previous TSB 08-004-26 dated January 08, 2026.

The TSB applies to 2025 Jeep Wrangler models built on or after March 24, 2025, that are equipped with the Central ADAS Decision Module (CADM), identified by Sales Code XMB. The primary solution involves updating the DASM software to prevent various warning lights and messages from appearing.

Symptoms

Owners of affected 2025 Jeep Wrangler vehicles may experience a Malfunction Indicator Lamp (MIL) illuminating on the dashboard. Additionally, the vehicle may display the message "ACC/FCW Unavailable Service Required" intermittently in the Instrument Panel Cluster (IPC).

Fault Codes / DTCs

Customers may also find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the vehicle's system:

Code	Description	Module
C2206-00	Vehicle Configuration Mismatch	Driver Assistant System Module
C2318-49	Front Camera - Internal Electronic Failure	Driver Assistant System Module

Diagnosis / Trigger Conditions

The DTC C2206-00, indicating a "Vehicle Configuration Mismatch," can sometimes be triggered after an aftermarket tire installation or tire modification. The updated DASM software is specifically designed to resolve this DTC when it arises under such conditions. The C2318-49 code points to an internal electronic failure within the front camera system, which the software update also addresses.

Technicians will use a scan tool like wiTECH with appropriate diagnostic procedures to verify all related systems are functioning correctly. Any DTCs or symptoms not covered by this bulletin should be recorded and repaired before proceeding with the DASM software update.

Repair Procedure Summary

The repair procedure for the 2025 Jeep Wrangler DASM update involves inspecting the Driver Assistant System Module and, if necessary, reprogramming it with the latest available software. Before starting the reprogramming process, it is crucial to install a battery charger to maintain stable voltage. The wiTECH Diagnostic Application is used for the software flash.

After the reprogramming is complete, any Diagnostic Trouble Codes that may have been set in various modules will be automatically presented by the wiTECH application, allowing the technician to clear them. For vehicles in the SA market, it is not necessary to send DID-1 or DID-A after applying this TSB.

Required Tools or Parts

The primary tool required for this service is a wiTECH diagnostic tool or an equivalent system capable of performing module reprogramming.

Important Warnings

• When performing the DASM software flash, install a battery charger to ensure battery voltage does not drop below 13.2 volts. Also, do not allow the charging voltage to climb above 13.5 volts during the flash process.
• If the flash process is interrupted or aborted for any reason, the flash should be restarted from the beginning.

Owner Action

If your 2025 Jeep Wrangler is experiencing any of the symptoms described, such as a Malfunction Indicator Lamp (MIL) illumination, the "ACC/FCW Unavailable Service Required" message, or if you suspect your vehicle may have the related DTCs C2206-00 or C2318-49, you should contact your authorized Jeep dealer. They can verify if your vehicle is covered by TSB 08-004-26 REV. A or RSU 26-017 by checking your VIN in their system.

All repairs performed under this Technical Service Bulletin are reimbursable within the provisions of your vehicle's warranty.

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Source: NHTSA ID: 11028216