Electronic Stability Control (Esc); Brake Assist - Saturn 2009 Aura Green Line Hybrid Owner's Manual

Brake Assist

This vehicle has a Brake Assist feature designed to assist
the driver in stopping or decreasing vehicle speed in
emergency driving conditions. This feature uses the
stability system hydraulic brake control module to
supplement the power brake system under conditions
where the driver has quickly and forcefully applied the
brake pedal in an attempt to quickly stop or slow down
the vehicle. The stability system hydraulic brake control
module increases brake pressure at each corner of the
vehicle until the ABS activates. Minor brake pedal
pulsations or pedal movement during this time is normal
and the driver should continue to apply the brake pedal
as the driving situation dictates The Brake Assist feature
will automatically disengage when the brake pedal is
released or brake pedal pressure is quickly decreased.
4-6

Electronic Stability Control (ESC)

The vehicle has an Electronic Stability Control (ESC)
system which combines antilock brake, traction and
stability control systems and helps the driver maintain
directional control of the vehicle in most driving
conditions.
When you first start the vehicle and begin to drive away,
the system performs several diagnostic checks to ensure
there are no problems. The system may be heard or felt
while it is working. This is normal and does not mean
there is a problem with the vehicle. The system should
initialize before the vehicle reaches 20 mph (32 km/h).
If the system fails to turn on or activate, the ESC/TCS
light will be on solid, and the ESC OFF or SERVICE
ESC message will be displayed.
For more information, see Driver Information Center
(DIC) on page 3-40.