2022 Jeep Compass ACC/FCW Unavailable TSB 08-157-26

Owners of the 2022 Jeep Compass may encounter a "Malfunction Indicator Lamp (MIL) illumination" on their dashboard, frequently accompanied by the specific message "ACC/FCW Unavailable, Service Required" displayed in the Instrument Panel Cluster (IPC). This combination of warnings points to a problem within the vehicle's Adaptive Cruise Control (ACC) system. Technical Service Bulletin (TSB) 08-157-26 addresses this particular concern, identifying the root cause as an issue with the ACC software that necessitates an update. The presence of these symptoms, especially the "ACC/FCW Unavailable, Service Required" message, indicates that the vehicle's advanced driver-assistance features related to cruise control are not functioning correctly.

Symptoms You Might Experience

If your 2022 Jeep Compass is experiencing this issue, the most noticeable signs will be visual alerts within the vehicle. You will observe a "Malfunction Indicator Lamp (MIL) illumination" on the instrument panel, signaling a general system fault. More specifically, the Instrument Panel Cluster (IPC) will display a critical warning message: "ACC/FCW Unavailable, Service Required". This message directly informs the driver that the Adaptive Cruise Control and Forward Collision Warning (FCW) systems are not operational and require service. These warnings are direct indicators that the vehicle's ability to automatically adjust speed and maintain distance from other vehicles is compromised.

Fault Codes / DTCs

When a diagnostic scan is performed on an affected 2022 Jeep Compass, the following Diagnostic Trouble Code (DTC) will typically be present:

Code	Description	Module
C14A4-00	Sensor Adjustment Required	ACC

This specific DTC, C14A4-00, indicates that the Adaptive Cruise Control (ACC) system's sensor requires adjustment. However, as clarified by TSB 08-157-26, this "adjustment" is resolved through a software update rather than a physical sensor calibration in this context.

Diagnosis and Trigger Conditions

Before proceeding with the repair, technicians are instructed to use a Scan Tool (such as wiTECH) and follow appropriate Diagnostic Procedures available in DealerCONNECT/Service Library. The goal is to verify that all related systems are functioning as designed. If any DTCs or symptom conditions other than C14A4-00 or the "ACC/FCW Unavailable, Service Required" message are present, those issues must be recorded and repaired first. This ensures that the problem is indeed the one addressed by TSB 08-157-26 and not a separate, underlying fault. The primary trigger condition for this bulletin is the customer experiencing the MIL illumination and the vehicle setting the C14A4-00 DTC, along with the specific warning message.

Cause of the Issue

The underlying cause for the "Malfunction Indicator Lamp (MIL) illumination," the "ACC/FCW Unavailable, Service Required" message, and the C14A4-00 DTC in the 2022 Jeep Compass is identified as a software anomaly within the Adaptive Cruise Control (ACC) module. This software glitch prevents the ACC system from correctly interpreting sensor data or managing its functions, leading to the system becoming unavailable and triggering the associated warnings and fault codes. Updating this software is key to resolving the issue.

Important Warnings and Market Applicability

It is crucial for owners and technicians to understand the specific applicability of Technical Service Bulletin 08-157-26. This bulletin explicitly states that it is "Not applicable to vehicles built for US market." Instead, it applies to vehicles sold in the South America market, as well as other regions indicated by sales codes NA, MEA, SA, IAP, EE, and CH. Owners in the US experiencing similar symptoms with their 2022 Jeep Compass should be aware that this particular TSB does not apply to their vehicle, and alternative diagnostic and repair procedures would be necessary.

Furthermore, the TSB includes an important procedural note for technicians: "After applying this TSB, it is not necessary to send DID-I or DID-A." This instruction helps streamline the repair process by clarifying that certain post-repair documentation or data submission steps are not required for this specific software update.

Repair Procedure Summary

The repair outlined in TSB 08-157-26 for the 2022 Jeep Compass involves a multi-step process focused on updating and calibrating the Adaptive Cruise Control (ACC) module. The high-level flow is as follows:

1. Software Reprogramming: The first step is to reprogram the ACC module using the wiTECH Diagnostic Application. This ensures the module receives the latest available software to correct the identified anomaly. Technicians are advised to contact the Helpdesk if any issues arise during this flashing process.
2. Diagnostic Trouble Code (DTC) Clearing: Once the ACC module is reprogrammed, all DTCs that may have been set in any module due to the reprogramming must be cleared. The wiTECH application is designed to automatically present these codes for clearing.
3. ACC Module Access: Technicians then navigate within the wiTECH application to the "ECU view" for the ACC module.
4. Miscellaneous Functions: From the ACC module's "ECU view," the "Misc Functions" menu is selected.
5. DASM Drive Calibration: The final step involves selecting and following the prompts for the "ACC DASM Drive Calibration" procedure. This calibration process, guided by the diagnostic scan tool, ensures the ACC system is properly configured after the software update.

Required Tools or Parts

The primary and essential tool for performing the repair detailed in TSB 08-157-26 is the wiTECH diagnostic system or an equivalent diagnostic tool. This specialized tool is indispensable for accessing, reprogramming, and calibrating the Adaptive Cruise Control module. No specific replacement parts are listed as required for this software-based repair.

Owner Action

If you own a 2022 Jeep Compass and are experiencing the "Malfunction Indicator Lamp (MIL) illumination," the "ACC/FCW Unavailable, Service Required" message, or if a diagnostic scan reveals DTC C14A4-00, particularly if your vehicle was originally sold in the South American market or other applicable regions outside the US, you should arrange for service at an authorized Jeep dealership. This issue is resolved through a software update to the Adaptive Cruise Control module. The repair is covered under the vehicle's warranty provisions. The estimated labor time for this specific operation, identified as 18-80-95-AC, is approximately 0.2 hours.

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Source: NHTSA ID: 11031437