2023-2025 Jeep Compass ACC/FCW Unavailable TSB S2523000022

Symptoms

Owners of 2023-2025 Jeep Compass vehicles may observe an "ACC/FCW Unavailable Service Required" message displayed on the instrument cluster. This condition is frequently reported in environments with high gusty or crosswinds, particularly when driving at freeway speeds, typically between 60 to 70 mph or more. This indicates a potential malfunction with the Adaptive Cruise Control and Forward Collision Warning systems.

Fault Codes / DTCs

Technicians investigating this issue will likely find the diagnostic trouble code (DTC) C14A4-00 stored in the Adaptive Cruise Control (ACC) module. This code specifically indicates a "Sensor Adjustment Required."

Diagnosis and Trigger Conditions

The primary trigger for the "ACC/FCW Unavailable Service Required" message and the Jeep Compass C14A4-00 DTC is believed to be movement of the ACC module. The ACC module is designed to snap into a bracket attached to the front fascia. If this bracket is not damaged and the module is fully seated, the issue can still arise if the module moves slightly due to strong winds encountered at higher speeds. This movement can cause the sensor to lose its calibration, leading to the C14A4-00 fault.

Repair Procedure Summary

Manufacturer Communication S2523000022 Rev. B details a procedure to address the Jeep Compass C14A4-00 issue. The repair involves stabilizing the ACC module to prevent movement:

1. Fascia Removal: The front fascia must be removed to access the ACC module and impact beam. Technicians should refer to Service Library 08 - Electrical / 8E - Electronic Control Modules / MODULE, Adaptive Cruise Control (ACC) / Removal and Installation for detailed steps.
2. Surface Preparation: After fascia removal, the front of the impact beam, located behind the ACC module, must be thoroughly cleaned using mild soap and water, followed by a wax and grease remover.
3. Material Application Area: Masking tape is applied to the top/front portion of the impact beam to define a 1-inch (25mm) by 6-inch (125mm) area for material application.
4. Dampening Material Application: A specific 3M dampening material is then applied within the masked area. This material is layered to achieve a thickness of 7mm, following the product's instructions for proper cure time.
5. Reassembly and Calibration: Once the dampening material has cured, the front fascia is reinstalled. Finally, an ACC DASM Drive Calibration must be performed using the WiTECH diagnostic tool, accessible through the ACC module's Misc Function menu. The ACC system's operation must be validated before returning the vehicle to the customer.

Required Tools or Parts

To perform the repair outlined in TSB S2523000022 Rev. B, the following specific materials and tools are required:

• 3M 04274 Dampening Material
• 3M 08571 Manual Cartridge Applicator
• 3M 08193 Mixing Tip
• WiTECH diagnostic tool (for calibration)

Owner Action

If your 2023-2025 Jeep Compass is displaying the "ACC/FCW Unavailable Service Required" message or you suspect a Jeep Compass C14A4-00 diagnostic trouble code, it is recommended to schedule an appointment with your authorized Jeep dealership. They can diagnose the issue and perform the necessary repair as described in Manufacturer Communication S2523000022 Rev. B. This communication does not authorize warranty repairs, so discuss potential costs with your dealer.

Source: NHTSA ID 11019762