2025-2026 Jeep Compass Brake Warning Lamp On TSB

Important Warning: Market Applicability

It is crucial to note that this Technical Service Bulletin (TSB) 08-275-25 REV. B, and its associated Rapid Service Update (RSU) 25-172, applies primarily to the South American market. This bulletin is not applicable to vehicles built for the U.S. market. Owners in other regions should consult their local dealership for applicability.

Symptoms

Owners of affected 2025-2026 Jeep Compass, Renegade, Commander, and RAM Rampage vehicles may experience a range of symptoms related to the brake system. The most common indicator is a "Malfunction Indicator Lamp (MIL) illumination" on the dashboard. You might also see an "ABS" warning displays on the Instrument Panel Cluster (IPC).

Another noticeable symptom is "Excessive force required when depressing the brake pedal when trying to start the engine." These issues point to a potential problem with the brake pedal switch, which can trigger the "Brake Warning Lamp On" message.

Fault Codes / DTCs

This issue is specifically linked to a single Diagnostic Trouble Code (DTC):

• C1215-86: Brake Light Switch - Signal Invalid

This DTC indicates that the vehicle's system is receiving an invalid signal from the brake light switch, which can lead to the observed symptoms and the "Brake Warning Lamp On" illumination.

Diagnosis

To diagnose the 2026 Jeep Compass Brake Warning Lamp issue, technicians will use a wiTECH scan tool. The diagnostic process involves verifying that all related systems are functioning correctly. If any other DTCs or symptom conditions are present, they must be addressed and repaired before proceeding with the steps outlined in this bulletin. The TSB specifically states that if a customer describes any of the symptoms mentioned, the repair procedure should be followed.

Repair Procedure Summary

The repair for the 2026 Jeep Compass Brake Warning Lamp involves inspecting and potentially reseating the brake pedal switch. The process begins by checking if the vehicle is on the Rapid Service Update (RSU) VIN list. If it is, the technician connects the wiTECH tool to the vehicle.

Using the wiTECH, the technician selects the ABS module and accesses the DATA function to monitor various parameters. They will specifically look at the "pressure of the fluids" and the "brake light switch" status, observing both normal open and normal closed options. The system's graphics function is then used to monitor the behavior as the brake pedal is slowly pressed.

During this monitoring, the pressure readings should be up to 4 Bar for H1/M1/N4 models and 6 Bar for B1 models when the first stage of the switch is activated. If the pressure is not greater than these values, the bulletin is considered complete, and the RSU is closed using Labor Operation 08-80-84-90.

If the pressure is greater, the technician proceeds to disconnect the negative battery terminal, waiting at least two minutes for the airbag system capacitor to discharge. The brake pedal switch is then removed by turning it counterclockwise. It is crucial not to move the brake pedal during this step to avoid damaging the component. The switch is then repositioned and fixed by turning it clockwise until it clicks into place. Finally, the battery terminal is reconnected, DTCs are cleared, and the engine is started to re-check the residual brake pressure. The pressure should now be less than or equal to 4 Bar (H1/M1/N4) and 6 Bar (Renegade).

Required Tools or Parts

The primary tool required for this repair is the wiTECH scan tool or an equivalent diagnostic system. No specific part numbers are listed for replacement, as the procedure focuses on inspection and reseating the existing brake pedal switch.

Owner Action

If you own a 2025-2026 Jeep Compass, Renegade, Commander, or RAM Rampage and experience a "Brake Warning Lamp On" or any of the described symptoms, especially if you are in the South American market, you should contact your authorized dealership. All repairs performed under this TSB 08-275-25 REV. B are reimbursable within the provisions of your vehicle's warranty.

Important Warnings

• Do not move the brake pedal at any time during the switch removal and installation process, as this carries a risk of breaking the component.
• Wait at least two minutes for the airbag system capacitor to discharge after disconnecting the negative battery terminal before proceeding with any further steps.
• After applying this TSB, it is not necessary to send DID-I or DID-A data.

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Source: NHTSA ID: 11024590