2023-2024 Jeep Compass RKE and Remote Start Issues

Owners of 2023-2024 Jeep Compass vehicles may experience a range of issues related to their Remote Keyless Entry (RKE) system, remote start functionality, or even tire pressure monitoring. Manufacturer communication S2408000100, released in September 2024, outlines diagnostic steps for technicians to address these concerns, which often point to problems with the Remote Start Antenna (RSA) or Radio Frequency Hub (RFHUB).

This bulletin provides guidance on troubleshooting and resolving conditions such as reduced RKE range, inoperative remote start, and dashboard warnings. If you're encountering problems with your Jeep Compass RKE remote start, this information can help you understand the potential causes and repair approaches.

Symptoms

Owners might notice one or more of the following symptoms indicating a potential issue with their vehicle's RKE or remote start system:

• "Remote Keyless Entry (RKE) Reduced Range"
• "Remote Start Inoperative"
• "Multiple Keyless-Go Push Attempts to Start"
• "Key Not Detected message"
• "Tire Pressure Warning Lamp On"

These symptoms suggest a communication problem within the vehicle's keyless entry and remote start systems, often accompanied by specific diagnostic trouble codes.

Fault Codes / DTCs

When these symptoms occur, a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) stored or active in the vehicle's system:

Code	Description	Module
B1A76	Remote Start Antenna Connection Open	RFHUB
C151D-00	Tire Sensor Missing	RFHUB
C1501-31	Tire Sensor No Signal	RFHUB
C1502-31	Tire Sensor No Signal	RFHUB
C1503-31	Tire Sensor No Signal	RFHUB
C1504-31	Tire Sensor No Signal	RFHUB

These codes specifically point to issues with the Remote Start Antenna (RSA) and tire pressure sensors, which are managed by the Radio Frequency Hub (RFHUB).

Diagnosis / Trigger Conditions

Technicians are advised to investigate the Remote Start Antenna (RSA) located at the Radio Frequency Hub (RFHUB) and the rear headliner. The primary focus is on identifying any loose or damaged connections. The presence of the listed DTCs, along with the reported symptoms, helps guide the diagnostic process for the Jeep Compass RKE remote start system.

Repair Procedure Summary

The repair procedure outlined in TSB S2408000100 involves a series of inspections and potential component swaps to resolve the issues. These steps are crucial for addressing the underlying cause of the Jeep Compass RKE remote start problems:

1. Initial Inspection: Examine the Remote Start Antenna (RSA) connections at the Radio Frequency Hub (RFHUB) for any signs of looseness or damage. A visual inspection of the RSA at the rear headliner location is also required.
2. Connection Security: Ensure all connections are secure. If connections are found to be loose, they should be firmly reconnected.
3. Antenna Testing: To confirm proper operation, technicians may swap the existing RSA with a known good antenna (either a remote start test antenna or a jumper from the RFHUB to RSA).
4. Coax Inspection: Disconnect the coaxial cable and inspect for any damage at both the RFHUB and RSA locations.
5. Coax Reconnection and Test: Securely reconnect the coaxial cable. Test its operation using a test lead or a known good part to verify functionality.
6. ECU Reset: Use a scan tool to reset the Engine Control Unit (ECU).
7. Verification: After performing the necessary repairs, verify that the system operates correctly and that no Diagnostic Trouble Codes (DTCs) are returning.
8. Addressing Returning Concerns: If symptoms persist, technicians should inspect for any aftermarket equipment that might be interfering with the system. Additionally, the Key FOB range should be checked using an RF tester to validate its operational strength.

These inspections should always be performed before considering any service parts replacements.

Important Warnings

This manufacturer communication includes critical advisories for technicians and owners:

• "This document does not authorize warranty repairs."
• "This communication documents a record of past experiences. STAR Online does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the appropriate course of action."

This means that while the bulletin provides valuable diagnostic information, it does not guarantee that any repair will be covered under warranty, and the ultimate responsibility for diagnosis and repair decision-making rests with the service technician.