2025 Jeep Wrangler DASM Software Update TSB 08-188-25

The 2025 Jeep Wrangler manufacturer_communication, specifically Technical Service Bulletin (TSB) 08-188-25, addresses a software-related issue that can impact the vehicle's Driver Assistant System Module (DASM). This bulletin, issued on June 11, 2025, provides a crucial software update for certain 2025 Jeep Wrangler vehicles. The affected vehicles are those equipped with the Central ADAS Decision Module (CADM) (Sales Code XMB) and built within a specific timeframe: on or after March 28, 2025 (MDH 0328XX) and on or before May 05, 2025 (MDH 0505XX).

This manufacturer communication is broadly applicable across various global markets, including North and South America, Enlarged Europe, the Middle East & Africa, India, and Asia Pacific. Owners of these specific 2025 Jeep Wrangler vehicles may observe distinct warning signs related to their advanced driver-assistance systems, indicating a need for this software intervention.

Symptoms

Owners of the affected 2025 Jeep Wrangler vehicles may experience a Malfunction Indicator Lamp (MIL) illuminating on their dashboard. This MIL, commonly known as the "Check Engine Light," signals a detected fault within the vehicle's systems.

In conjunction with the MIL, the vehicle is likely to set a specific Diagnostic Trouble Code (DTC). Furthermore, drivers might intermittently observe the message "ACC/FCW Unavailable Service Required" displayed prominently in the Instrument Panel Cluster (IPC). This message directly indicates a problem with the Adaptive Cruise Control (ACC) and Forward Collision Warning (FCW) systems, which rely on the proper functioning of the DASM.

Fault Codes / DTCs

The primary Diagnostic Trouble Code (DTC) that will be set in affected vehicles is:

Code	Description
C2318-49	Front Camera - Internal Electronic Failure

This specific DTC, C2318-49, directly points to an internal electronic failure within the front camera system. This camera is a critical component for the advanced driver-assistance features and is managed by the DASM. The root cause of this failure is identified as a software anomaly within the DASM itself.

Diagnosis / Trigger Conditions

To accurately diagnose this condition, service technicians must utilize a specialized Scan Tool, such as wiTECH. This tool allows them to access the vehicle's diagnostic systems and verify that all related systems are functioning as intended. If a customer reports any of the symptoms mentioned above, particularly the MIL illumination or the "ACC/FCW Unavailable Service Required" message, and the scan tool confirms the presence of DTC C2318-49, then the repair procedure detailed in TSB 08-188-25 should be initiated. The diagnosis ensures that the issue is indeed the DASM software and not another underlying problem.

Repair Procedure Summary

The corrective action for this issue involves reprogramming the Driver Assistant System Module (DASM) with the latest available software. This crucial update is performed using the wiTECH Diagnostic Application.

Before initiating the flash programming process, it is absolutely essential to connect a battery charger to the vehicle. This charger must maintain the battery voltage within a narrow range, specifically between 13.2 and 13.5 volts. Maintaining stable voltage is critical to prevent any interruption or abortion of the software update, which could lead to further complications. Should the flash process be interrupted for any reason, it must be restarted from the beginning. Once the reprogramming is successfully completed, the wiTECH application will automatically present any Diagnostic Trouble Codes that may have been set in other modules during the process, allowing the technician to clear them. For vehicles designated for the SA market, a specific note clarifies that it is not necessary to send DID-1 or DID-A after applying this TSB.

Required Tools or Parts

The primary specialized tool necessary for performing this software update is:

• wiTECH or an equivalent Scan Tool capable of module reprogramming.

Important Warnings

• Battery Voltage Stability: During the critical software flash process, it is imperative to install a battery charger. The charging voltage must be carefully maintained, ensuring it does not drop below 13.2 volts nor climb above 13.5 volts. Fluctuations outside this range can lead to an interrupted or failed programming sequence.
• Interrupted Flash Procedure: If the DASM software flash process is interrupted or aborted at any point, the entire procedure must be immediately restarted. Attempting to proceed without a complete and successful flash can result in module malfunction.

Owner Action

If you are an owner of a 2025 Jeep Wrangler and observe a Malfunction Indicator Lamp illuminated on your dashboard, or frequently see the "ACC/FCW Unavailable Service Required" message in your Instrument Panel Cluster, it is strongly recommended to contact your authorized Jeep dealership. Your dealership's service department is equipped with the necessary diagnostic tools, such as the wiTECH scan tool, to confirm the presence of DTC C2318-49 and apply the required software update to the Driver Assistant System Module (DASM) as outlined in TSB 08-188-25. This repair is typically covered and reimbursable under the provisions of your vehicle's warranty. Addressing this 2025 Jeep Wrangler manufacturer_communication promptly ensures the proper functioning of your vehicle's safety and driver-assistance systems.

---

Source: NHTSA ID: 11019611