Aston Martin DB 9 2010 Manual page 100

DSC has three modes of operation:
ON - The DSC system sets to ON each time the engine is started.
DSC is controlling engine torque and applying strategic application of
the brakes at individual wheels.
While the DSC system intervenes to correct the vehicle stability the
symbol, on the instrument cluster, will flash.
5.14
Track Mode - Press and hold the DSC button (A) for two seconds.
'DSC TRACK MODE SELECTED' will show in the message centre
(right) and the symbol will be ON in the instrument cluster. This
raises the thresholds at which the DSC system intervenes. While the
DSC system intervenes the symbol will flash.
OFF - Press and hold the DSC button for four seconds. 'DSC
FUNCTION OFF' will show in the message centre (right) and the
symbol will show in the instrument cluster. DSC is no longer
controlling engine torque and applying strategic application of the
brakes at individual wheels.
At any time while in Track mode or OFF, press and release the DSC
button to start DSC.
The DSC button LED and the DSC symbol (instrument cluster)
will come ON when the system is set to Track mode or OFF.
Fault Signs
A malfunction in the DSC control system will be shown by the
following:
• The DSC symbol in the instrument cluster will come ON
• A warning message will show in the message centre (right)
depending on the fault detected