Electronic brake force dis- tribution (ebd) system – Subaru 2011 Impreza WRX User Manual

Page 297

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北米Model "A1110BE-C" EDITED: 2010/ 12/ 17

vehicles.

. When driving on badly surfaced

roads, gravel roads, icy roads, or
over deep newly fallen snow,
stopping distances may be long-
er for a vehicle with the ABS
system than one without. When
driving under these conditions,
therefore, reduce your speed and
leave ample distance from other
vehicles.

. When you feel the ABS system

operating, you should maintain
constant brake pedal pressure.
Do not pump the brake pedal
since doing so may defeat the
operation of the ABS system.

& ABS system self-check

Just after the vehicle is started, you may
feel on the brake pedal a vibration similar
to when the ABS operates, and you may
also hear the sound of the ABS working
from the engine compartment. This is
caused by an automatic functional test of
the ABS system being carried out and
does not indicate any abnormal condition.

& ABS warning light

Refer to

“ABS warning light” F3-21.

Electronic Brake Force Dis-
tribution (EBD) system

The EBD system maximizes the effective-
ness of the brakes by allowing the rear
brakes to supply a greater proportion of
the braking force. It functions by adjusting
the distribution of braking force to the rear
wheels in accordance with the vehicle

’s

loading condition and speed.
The EBD system is an integral part of the
ABS system and uses some of the ABS
system

’s components to perform its func-

tion of optimizing the distribution of brak-
ing force. If any of the ABS components
used by the EBD system malfunction, the
EBD system also stops working.

When the EBD system is operating, you
may hear a chattering noise or feel a slight
vibration in the brake pedal. This is normal
and does not indicate a malfunction.

& Steps to take if EBD system

malfunctions

Turbo models

Non-turbo models

If a malfunction occurs in the EBD system,
the system stops working and the brake

Starting and operating

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