2026 Jeep Compass ACC Software Update TSB 08-153-26

Owners of the 2026 Jeep Compass equipped with Adaptive Cruise Control W/Stop & Go (Sales Code NHZ) may encounter issues with their vehicle's Adaptive Cruise Control (ACC) system. This is specifically addressed by Technical Service Bulletin (TSB) 08-153-26, which details a software update to correct the problem. The primary cause of these issues is identified as a fault within the ACC software itself.

This TSB is particularly relevant for vehicles built on or before May 18, 2026 (MDH 0518XX). It's important to note that while the TSB references various market applicability codes, the bulletin explicitly states it applies to the South America market. If you own a 2026 Jeep Compass and experience the described symptoms, understanding this TSB can help you address the problem effectively.

Symptoms of ACC Software Issues

Owners experiencing this issue with their 2026 Jeep Compass ACC software will typically notice a Malfunction Indicator Lamp (MIL) illuminating on the dashboard. In addition to the warning light, a specific message will appear in the Instrument Panel Cluster (IPC).

The verbatim message displayed is:

• "ACC/FCW Unavailable, Service Required"

These symptoms indicate that the Adaptive Cruise Control and Forward Collision Warning (FCW) systems are not functioning correctly and require attention.

Diagnostic Trouble Codes (DTCs)

When the 2026 Jeep Compass ACC software issue occurs, a specific Diagnostic Trouble Code (DTC) will be set in the vehicle's system. This code helps technicians identify the nature of the problem.

Code	Description
C14A4-00	Sensor Adjustment Required

This DTC points directly to a need for adjustment or recalibration related to the ACC sensor, which is resolved through the software update.

Cause of the Problem

The root cause of the Malfunction Indicator Lamp illumination, the "ACC/FCW Unavailable, Service Required" message, and the DTC C14A4-00 in affected 2026 Jeep Compass vehicles is identified as faulty ACC software. Reprogramming the Adaptive Cruise Control module with the latest available software is the prescribed solution to rectify these issues.

Repair Procedure Summary

The repair outlined in TSB 08-153-26 involves updating the Adaptive Cruise Control (ACC) module software. Technicians will use a diagnostic scan tool, such as wiTECH, to perform this procedure.

The general steps for the repair are:

1. Software Reprogramming: The ACC module is reprogrammed with the most current software version. If any issues arise during this flashing process, technicians are instructed to contact the Helpdesk.
2. DTC Clearing: After the software update, all Diagnostic Trouble Codes (DTCs) that may have been set in any module due to the reprogramming process are cleared. The wiTECH application will automatically present and allow clearing of these DTCs.
3. Module Navigation: The technician navigates to the ACC module's "ECU view" within the diagnostic tool.
4. Function Selection: From the "Misc Functions" menu, the "ACC DASM Drive Calibration" procedure is selected.
5. Calibration Execution: The technician follows the prompts provided by the diagnostic scan tool to complete the calibration.

Required Tools and Parts

To perform the software update and calibration for the 2026 Jeep Compass ACC software issue, technicians will need specific diagnostic equipment.

• Diagnostic Tool: wiTECH or an equivalent diagnostic system is required. This tool is essential for accessing the vehicle's modules, performing the software flash, and executing the calibration procedure.

Important Warnings and Notes

Owners should be aware of specific details regarding this Technical Service Bulletin:

• Market Applicability: While the TSB lists multiple market codes, it explicitly states that "This bulletin applies to the South America market." Owners in other regions should verify applicability with their dealer.
• Post-Repair Action: After the TSB is applied, it is explicitly stated that "it is not necessary to send DID-I or DID-A." This clarifies a specific procedural step for technicians.

Owner Action and Warranty

If your 2026 Jeep Compass is exhibiting a Malfunction Indicator Lamp, the "ACC/FCW Unavailable, Service Required" message, or has DTC C14A4-00 stored, it is recommended to schedule an appointment with an authorized Jeep dealership. The repair, which involves reprogramming the 2026 Jeep Compass ACC software, is reimbursable within the provisions of the vehicle's warranty. The estimated labor time for this procedure is 0.2 hours.

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NHTSA ID: 11031433