Fail Safe Cooling Warning Chime
WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
When the engine coolant temperature reaches an over temperature condition, the powertrain control module (PCM) provides an over temperature signal to the instrument cluster. The instrument cluster positions the temperature gauge in the HOT range and flashes the CHECK GAGE indicator. The instrument cluster also provides an intermittent chime, consisting of 3 tones within a 5 second interval for level one fail safe cooling mode or 5 tones within a 9 second interval for level two fail safe cooling mode.