Cadillac 2007 CTS Owner's Manual page 232

Competitive Driving (CTS-V)
When competitive driving mode is turned on with
the TC (traction control) button, this message
will be displayed on the DIC. The TC light will be
on when the competitive driving mode is on.
The Traction Control System (TCS) will not
operate while in competitive driving mode. You
should adjust your driving accordingly. See
the CTS-V portion of Traction Control System
(TCS) (CTS) on page 295 or Traction Control
System (TCS) (CTS-V) on page 297 for more
information.
Driver Door Ajar
When this message appears on the display, it
means that the driver's door was not closed
completely. You should make sure that the driver's
door is closed completely.
232
Engine Coolant Hot – AC
(Air Conditioning) Off
This message displays when the engine coolant
becomes hotter than the normal operating
temperature. To avoid added strain on a hot
engine, the air conditioning compressor is
automatically turned off. When the coolant
temperature returns to normal, the air conditioning
compressor will turn back on. You can continue
to drive your vehicle.
If this message continues to appear, have the
system repaired by your dealer as soon as
possible to avoid damage to the engine or
transmission.