Volvo 2005 C70 - Manual (Page 81)

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EBD (Electronic Brake-force
Distribution)
EBD is an integrated part of the ABS system.
EBD regulates the hydraulic pressure to the
rear brakes to help provide optimal braking
capacity.
If the BRAKE and ABS warning lights come
on at the same time, this could indicate a fault
in the brake system. If the brake fluid level is
above the MIN mark, drive carefully to an
authorized Volvo retailer and have the brake
system inspected.
WARNING!
If the fluid level is below the MIN mark in
the reservoir, DO NOT DRIVE. Have the
car towed to an authorized Volvo retailer
and have the brake system inspected.
Brake system - EBD, STC
Severe strain on the brake
system
The brakes will be subject to severe strain
when driving in mountains or hilly areas or
towing. Vehicle speed is usually slower, which
means that the cooling of the brakes is less
efficient than when driving on level roads. To
reduce the strain on the brakes, shift into a
lower gear and let the engine help with the
braking. Do not forget that, if you are towing a
trailer, the brakes will be subjected to a greater
than normal load.
Stability and Traction Control
(STC)
The STC-system is designed to help reduce
wheel spin by limiting power to the drive
wheels if they begin to loose traction at speeds
over 25 mph. At speeds over 25 mph, the STC
system monitors and compares all four wheels.
If one of the drive (front) wheels shows any
tendency to slip, such as when driving on
slippery roads, the difference in speed is
immediately detected. This triggers a signal to
the engine management system, which will
reduce engine torque (by reducing fuel) until
the differential is corrected. This torque
reduction is handled in stages, and reaction
time is extremely fast.
The indicator light will flash when STC
is actively regulating power to the drive
wheels. Normal power may be reduced at this
time. This is normal as power is momentarily
reduced to help keep the drive wheels from
losing traction and spinning.
The STC indicator light
will come on:
•
When the car is started, for approximately 2
seconds, as the system performs a self-
diagnostic test.
•
When STC has been switched off using the
button on the dashboard.
•
If the system is temporarily switched off
due to high brake temperatures. STC will
automatically restart when brake tempera-
ture has returned to normal.
•
If a fault is detected in the system. Consult
your Volvo retailer if this occurs.