Subaru Legacy 2010 - System Operation; Operating Conditions; Cancel Conditions

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Vehicle Dynamics and Driver Assist Systems
May 2017
System Operation
The Reverse Automatic Braking (RAB) system detects and measures the distance of objects
from the vehicle using ultrasonic sonar sensors installed in the rear bumper area. When the
system determines there is a moderate possibility of a collision, it will provide progressive
audible alerts to the driver through the Combination Meter speaker. When the system
determines there is a high possibility of a collision, it will reduce engine power and carry out
braking control to reduce any potential damage caused by hitting the object.
When engine power suppression control or brake control is being carried out, a warning screen
is shown on the Multi-Function Display (MFD) and an alarm sound is emitted to inform the
driver that the system control has been activated.
Note: After automatic braking control, if no operations are performed by the driver for
120 seconds, the Electronic Parking Brake (EPB) will be applied (EPB equipped
vehicles only).
When reversing (Operation upper limit: 15 km/h (9.3 MPH),
Collision avoidance: 5 km/h (3.1 MPH) or less)
Multifunction display
Multifunction display
Acceleration suppression + Braking
Obstacle
(Wall, etc.)
RAB activation
Acceleration suppression phase:
Repeated beeps
Brake activation phase:
Long continuous beep
When remaining stopped:
Repeated short beeps
When released:
Long beep
RAB Phases of Operation
Operating Conditions Cancel Conditions
• RAB activation ON • The driver depresses the brake pedal when the vehicle
remains at a complete stop.
• Parking brake OFF
• The select lever is in the “R” position. • The driver depresses the accelerator pedal when the
vehicle remains at a complete stop.
• The vehicle is reversing at approximately 1.5
to 15 km/h (1 to 9 mph). • Obstacles are unable to be detected.
• The obstacle is approximately 0.5 m (1.64 ft.) or
further from the bumper when the select lever
is shifted to the “R” position.
• The driver strongly depresses the accelerator pedal
during acceleration suppression.
• The select lever is shifted to any position other than “R”.
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