2022-2025 Jeep Compass ACC Radar Misalignment TSB 08-006-26

Symptoms of ACC Radar Misalignment

Owners of 2022-2025 Jeep Compass vehicles experiencing a Jeep Compass ACC fault may notice a Malfunction Indicator Lamp (MIL) illumination on their dashboard. This often accompanies the diagnostic trouble code (DTC) C14A4-00. Additionally, the Instrument Panel Cluster (IPC) might display the message "ACC/FCW Unavailable, Service Required".

It's important to note that the "ACC/FCW Unavailable, Service Required" message can also appear under specific environmental conditions, such as extreme windy conditions at speeds between 97 kph (60 mph) and 113 kph (70 mph). However, if this message persists or appears without such conditions, especially alongside a MIL or DTC C14A4-00, it likely points to the issue described in TSB 08-006-26.

Fault Codes (DTCs)

The primary diagnostic trouble code associated with this issue is:

• C14A4-00: Sensor Adjustment Required

This code specifically points to a problem with the calibration or alignment of the ACC radar sensor.

Diagnosis

To accurately diagnose the Jeep Compass ACC fault, technicians should use a wiTECH scan tool or an equivalent diagnostic system. The scan tool allows for appropriate Diagnostic Procedures available in DealerCONNECT/Service Library. It's crucial to verify that all related systems are functioning as designed. If any other DTCs or symptom conditions are present beyond those listed in TSB 08-006-26, they should be recorded and repaired first before proceeding with the specific repair for the ACC radar misalignment.

Repair Procedure Summary

The repair for the Jeep Compass ACC fault involves correcting the vertical misalignment of the Adaptive Cruise Control (ACC) radar. This is achieved by installing two washers to the ACC module bracket, located behind the front fascia. The general steps are as follows:

1. The front fascia of the vehicle must be carefully removed. Detailed instructions for this are available in the DealerCONNECT/Service Library under "Service Info>13 - Frame and Bumpers / Bumpers / Fascia, Front / Removal".
2. The electrical connector from the ACC module radar is then disconnected.
3. Three fasteners holding the ACC module bracket to the front fascia are removed. Figure 1 in the TSB illustrates these fasteners.
4. Two flat washers, each 1.5 mm thick (for a total of 3 mm thickness), are installed while re-attaching the top two ACC module bracket retainers to the front fascia. Figure 2 in the TSB shows this step.
5. The third ACC module bracket fastener is reinstalled.
6. All fasteners are securely tightened.
7. The electrical connector is reconnected to the ACC module radar.
8. The front fascia is reinstalled, following the detailed procedures in the DealerCONNECT/Service Library under "Service Info>13 - Frame and Bumpers / Bumpers / Fascia, Front / Installation".
9. An ACC DASM Calibration must be performed. This procedure can be found in the DealerCONNECT/Service Library under "Service Info> 08 - Electrical / 8E - Electronic Control Modules / Module, Adaptive Cruise Control (ACC) / Module Programming".
10. Finally, any stored diagnostic trouble codes are cleared.

This repair, identified by Labor Operation 08-20-27-95, has an estimated labor time of 1.6 hours.

Required Tools or Parts

For this repair, technicians will need:

• Flat Washers: Two flat washers, each with a thickness of 1.5 mm (0.15 cm), for a total required thickness of 3 mm (0.118 in.). The part number is listed as NPN (Not Provided Number), indicating they are generic or locally sourced.
• Scan Tool: A wiTECH diagnostic scan tool or an equivalent device is necessary for diagnosis and performing the ACC DASM Calibration.

Important Warnings

Owners should be aware that the message "ACC/FCW Unavailable, Service Required" can sometimes appear due to environmental factors, specifically extreme windy conditions at speeds between 97 kph (60 mph) and 113 kph (70 mph). If this message appears only under these specific conditions and resolves afterward, it may not indicate the underlying manufacturing issue. However, if the message is persistent, accompanied by a Malfunction Indicator Lamp (MIL), or the DTC C14A4-00, then the TSB 08-006-26 repair is likely needed.

Owner Action

If your 2022-2025 Jeep Compass exhibits a persistent Malfunction Indicator Lamp (MIL) or the "ACC/FCW Unavailable, Service Required" message, especially in conjunction with DTC C14A4-00, it is recommended to visit an authorized Jeep dealership. This issue is a manufacturing defect, and the repair is reimbursable within the provisions of the warranty. The dealership will perform the necessary diagnosis using a wiTECH tool and apply the repair outlined in Technical Service Bulletin 08-006-26.

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Source: NHTSA ID: 11027636