The car is equipped with two brake circuits. If a brake circuit is damaged, the brake pedal will engage deeper. Higher pressure on the pedal will therefore be needed to produce the normal braking effect.
The driver's brake pedal pressure is assisted by a brake servo.
The brake servo only works when the engine is running.
If the foot brake is used when the engine is switched off then the pedal will feel stiff and a higher pedal pressure must be used to brake the car.
In very hilly terrain or when driving with a heavy load the brakes can be relieved by using engine braking in manual gearshift mode. Engine braking is most efficiently used if the same gear is used downhill as up.
Anti-lock braking system
The car has anti-lock brakes, Anti-lock Braking System (ABS), which prevents the wheels from locking while braking and allows maintained steering control. Vibration may be felt in the brake pedal when this is engaged and this is normal.
A short test of the ABS system is made automatically after the car has been started when the driver releases the brake pedal. A further automatic test of the system may be made at low speed. The test may be felt as pulses in the brake pedal.
Symbols in the driver display
Check the brake fluid level. If the level is low, fill with brake fluid and check for the cause of the brake fluid loss.
Constant glow for 2 seconds when the engine is started: Automatic function check.
Constant glow for more than 2 seconds: Fault in the ABS system. The car's normal brake system is still working, but without the ABS function.
If both the warning lamps for brake fault and ABS fault illuminate at the same time, a fault has occurred in the brake system.
- If the level in the brake fluid reservoir is normal at this stage, drive carefully to the nearest workshop and have the brake system checked - an authorised Volvo workshop is recommended.
- If the brake fluid is below the MIN level in the brake fluid reservoir, do not drive further before topping up the brake fluid. The reason for the loss of brake fluid must be investigated.