2023 Jeep Compass ACC Fault TSB 08-156-26

Owners of the 2023 Jeep Compass equipped with Adaptive Cruise Control (ACC) with Stop & Go (Sales Code NHZ) may encounter issues with their vehicle's advanced driver-assistance systems. These problems are typically indicated by a Malfunction Indicator Lamp (MIL) illumination on the dashboard. This bulletin, TSB 08-156-26, dated April 16, 2026, addresses these concerns.

The core of the problem stems from the Adaptive Cruise Control (ACC) software, which requires an update. This software update is designed to resolve the underlying cause of the reported symptoms and ensure the ACC system functions correctly.

Important Warnings

It is crucial for owners to note that this bulletin applies to the South America market. Owners in other regions, such as North America, should consult their local dealership or service center for region-specific information regarding similar symptoms. Additionally, after applying this TSB, it is not necessary to send DID-I or DID-A data, simplifying the post-repair process for technicians.

Symptoms

If your 2023 Jeep Compass is affected by this issue, you will likely observe a Malfunction Indicator Lamp (MIL) illuminating on your instrument cluster. In conjunction with the MIL, you may also see a specific message displayed in the Instrument Panel Cluster (IPC). The exact message reported by customers is: "ACC/FCW Unavailable, Service Required". This indicates a problem with the Adaptive Cruise Control and Forward Collision Warning systems.

Fault Codes / DTCs

When diagnosing the 2023 Jeep Compass ACC fault, technicians will find a specific Diagnostic Trouble Code (DTC) stored in the vehicle's system. The DTC associated with this issue is:

• C14A4-00 - Sensor Adjustment Required

This code points directly to a need for adjustment or calibration within the sensor system related to the Adaptive Cruise Control.

Diagnosis / Trigger Conditions

To confirm the presence of the 2023 Jeep Compass ACC fault, a technician must verify that the Malfunction Indicator Lamp (MIL) is illuminated and that DTC C14A4-00 is set in the vehicle's diagnostic system. A scan tool, such as the wiTECH or an equivalent diagnostic device, is used to read these codes and assess the system's status. The diagnostic process involves using appropriate diagnostic procedures available in DealerCONNECT/Service Library to ensure all related systems are functioning as designed before proceeding with the repair. Any other DTCs or symptoms not listed in this bulletin should be addressed separately.

Repair Procedure Summary

The repair for the 2023 Jeep Compass ACC fault involves a software update and calibration of the Adaptive Cruise Control module. The procedure is as follows:

1. Reprogram the ACC Module: The technician will reprogram the Adaptive Cruise Control (ACC) module with the latest available software using the wiTECH diagnostic application. If any issues arise during this flashing process, a ticket must be submitted to the Helpdesk.
2. Clear DTCs: After the reprogramming, all Diagnostic Trouble Codes (DTCs) that may have been set in any module due to the reprogramming process must be cleared. The wiTECH application will automatically present all DTCs for clearing.
3. ACC Module Navigation: The technician will navigate to the ACC module's "ECU view" within the diagnostic tool.
4. Access Misc Functions: From the "ECU view," the "Misc Functions" menu will be selected.
5. Perform Calibration: The "ACC DASM Drive Calibration" procedure will be selected and followed according to the prompts provided by the diagnostic scan tool. This step ensures the ACC sensors are correctly adjusted after the software update.

Required Tools or Parts

The primary tool required for this repair is the wiTECH diagnostic system or an equivalent diagnostic scan tool capable of performing module reprogramming and calibration procedures for Jeep vehicles. No specific replacement parts are typically needed as this is a software-related repair.

Owner Action

If your 2023 Jeep Compass is displaying the "ACC/FCW Unavailable, Service Required" message or has a Malfunction Indicator Lamp (MIL) illuminated with DTC C14A4-00, you should schedule an appointment with an authorized Jeep dealership. The repair, which involves reprogramming the ACC module software, is reimbursable under the provisions of your vehicle's warranty. The labor time for this specific operation (Labor Operation No: 18-80-95-AC) is estimated at 0.2 hours.

Source: NHTSA ID 11031436