2026 Jeep Wrangler DASM Software Update TSB 08-114-26

Owners of the 2026 Jeep Wrangler may experience issues with their Driver Assistant System Module (DASM), leading to various warning lights and system malfunctions. This Technical Service Bulletin (TSB) 08-114-26, with revision 08-331-25 dated March 17, 2026, provides a software update to resolve these concerns. This TSB supersedes an earlier version, TSB 08-331-25, dated October 02, 2025.

This bulletin also applies to vehicles released as Rapid Service Update (RSU) 25-209. The 2026 Jeep Wrangler DASM update is crucial for maintaining the proper function of advanced driver assistance systems.

Symptoms

Customers may notice a Malfunction Indicator Lamp (MIL) illumination on the dashboard. In addition to the MIL, owners might experience one or more of the following:

• Intermittent display of the message "ACC/FCW Unavailable Service Required" in the Instrument Panel Cluster (IPC).
• The message "Service Adaptive Cruise Control" appearing in the IPC.
• Advanced Driver Assistance System features, such as Adaptive Cruise Control (ACC), Advanced Emergency Braking (AEB), and Forward Collision Warning (FCW), may become unavailable.

Fault Codes / DTCs

The issues described in TSB 08-114-26 are typically accompanied by specific Diagnostic Trouble Codes (DTCs) stored in the vehicle's system. These codes help technicians diagnose the precise nature of the problem.

Code	Description
C2206-00	Vehicle Configuration Mismatch
C2318-49	Front Camera - Internal Electronic Failure

It's important to note that DTC C2206-00, indicating a "Vehicle Configuration Mismatch," can sometimes be triggered after an aftermarket tire installation or tire modification. The updated software provided by this TSB is specifically designed to address this DTC when set under such conditions.

Diagnosis and Trigger Conditions

The root cause of these symptoms and DTCs is identified as the DASM software. To diagnose the issue, technicians use a Scan Tool (wiTECH) to verify that all related systems are functioning correctly. If DTCs or symptom conditions other than those listed in the bulletin are present, they should be recorded and addressed before proceeding with the TSB repair.

Technicians will also check if the vehicle's VIN is included in the RSU VIN list. If the vehicle is on the list or exhibits any of the listed symptoms, the repair procedure should be performed. This ensures the correct 2026 Jeep Wrangler DASM update is applied.

Repair Procedure Summary

The repair outlined in TSB 08-114-26 involves inspecting and reprogramming the Driver Assistant System Module (DASM) with the latest available software. This software update is designed to correct the underlying issues causing the MIL illumination, ADAS warnings, and specific DTCs.

Before initiating the flash process, a battery charger must be installed to ensure the battery voltage remains above 13.2 volts. It is critical that the charging voltage does not exceed 13.5 volts during this procedure. If the flash process is interrupted or aborted for any reason, it must be restarted from the beginning.

After the DASM reprogramming is complete, any DTCs that may have been set in any modules due to the reprogramming process must be cleared. The wiTECH application will automatically present all DTCs for clearing.

Required Tools or Parts

To perform the DASM software update, technicians will need:

• wiTECH or Equivalent: A diagnostic scan tool required for flashing the module and clearing DTCs.
• Battery Charger: To maintain stable battery voltage during the reprogramming process.

Important Warnings

Owners and technicians should be aware of the following critical information during the repair process:

• Battery Voltage: Do not allow the charging voltage to climb above 13.5 volts during the flash process. Maintaining the correct voltage range is essential for a successful update.
• Interrupted Flash: If the flash process is interrupted or aborted for any reason, it must be restarted. Attempting to proceed with an incomplete flash can lead to further issues.

Owner Action

If your 2026 Jeep Wrangler is exhibiting any of the symptoms described, such as a Malfunction Indicator Lamp, ADAS warning messages like "ACC/FCW Unavailable Service Required," or if you suspect a 2026 Jeep Wrangler DASM update is needed, you should schedule an appointment with your authorized dealership. All repairs performed under this Technical Service Bulletin are reimbursable within the provisions of your vehicle's warranty.

---

Source: NHTSA ID: 11030232