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2007 Volvo XC90
When the system "senses" impending lockup, braking pressure is automatically modulated in order to help prevent lockup,
which could lead to a skid.
The system performs a self-diagnostic test when the engine is started and when the vehicle first reaches a speed of
approximately 12 mph (20 km/h). The brake pedal will pulsate several times and a sound may be audible from the ABS
control module. This is normal.
To obtain optimal effect from the ABS system, constant pressure should be kept on the brake pedal. Do not pump the
brake pedal.
The switching of the ABS modulator will be audible and the brake pedal will pulsate during braking. Please be aware that
ABS does not increase the absolute braking potential of the vehicle. While control will be enhanced, ABS will not shorten
stopping distances on slippery surfaces.
ABS with 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. The brake pedal will pulsate during braking, which is normal.
If the BRAKE and ABS warning lights come on at the same time, this could indicate a fault in the brake system.
- Stop the vehicle in a suitable place and switch off the engine.
- Restart the engine.
- If both warning lights go off, no further action is required.
- If both lights are still on after the engine has been restarted, switch off the engine again and check the brake fluid level
(see
page 185 for the location of the brake fluid reservoir).
WARNING!
If the fluid level is below the MIN mark in the reservoir or if a "Brake failure - Service urgent" message is displayed in
the text window: DO NOT DRIVE. Have the vehicle towed to a Volvo retailer and have the brake system inspected.
- If the brake fluid level is above the MIN mark, drive carefully to an authorized Volvo retailer and have the brake system
inspected.
Emergency Brake Assistance (EBA)
The EBA function is designed to provide full brake effect immediately in the event of sudden, hard braking. The system is
activated by the speed with which you depress the brake pedal.
NOTE:
● When the EBA system is activated, the brake pedal will go down and pressure in the brake system immediately
increases to the maximum level. You must maintain full pressure on the brake pedal in order
pg. 129 Starting and driving
Brake system
to utilize the system completely. There will be no braking effect if the pedal is released. EBA is automatically deactivated
when the brake pedal is released.
● When the vehicle has been parked for some time, the brake pedal may sink more than usual when the engine is started.
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