Saturn 2009 SKY, Owner'S Manual

Page: 178 / 358

Braking in Emergencies
ABS allows the driver to steer and brake at the same
time. In many emergencies, steering can help more than
even the very best braking.
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.
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.
ESC activates when the computer senses a discrepancy
between the intended path and the direction the
vehicle is actually traveling. ESC selectively applies
braking pressure at any one of the vehicle’s brakes to
help steer the vehicle in the desired direction.
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 comes on, and the ESC OFF and/or SERVICE ESC
message displays.
For more information, see Driver Information
Center (DIC) on page 3-34.
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