TCC Engaged
WARNING: This page is about a different car, the 2008 Suzuki Reno, 2008 Suzuki Forenza, 2007 Suzuki Reno, and 2007 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.
When the brake pedal is applied, the Torque Converter Clutch (TCC) brake switch sends a signal to the ECM to disengage the TCC and disable the cruise control.