Brakes

The brake system is a hydraulic system consisting of two separate brake circuits. If a problem should occur in one of these circuits, it is still possible to stop the vehicle with the other brake circuit.

Brake system

If one of the brake circuits is not functioning, more pressure will be needed on the brake pedal (and the pedal will go down farther) for normal braking effect.

If the brake pedal must be depressed farther than normal and requires greater foot pressure, the stopping distance will be longer.

Pressure on the brake pedal is enhanced by the power braking function.

The power brakes only function when the engine is running.

If the power brakes are not working, considerably higher pressure will be required on the brake pedal to compensate for the lack of power assistance. This can happen for example when towing your vehicle or if the engine is switched off when the vehicle is rolling. The brake pedal feels stiffer than usual.

When the Hill Start Assist function is being used, it will take slightly longer for the brake pedal to return to its normal position if the vehicle is parked on an incline or uneven surface.

When driving in very hilly areas or if the vehicle is carrying a heavy load, manual gear shifting can be used for engine braking to augment the brakes. Hill Descent Control can also be used on steep downgrades to increase the engine braking effect at low speeds.

Anti-lock Braking System ABS

The ABS system helps to improve vehicle control (stopping and steering) during severe braking conditions by limiting brake lockup.

When ABS is operating, there may be some vibration in the brake pedal, which is normal.

The system performs a brief self-diagnostic test when the engine has been started and driver releases the brake pedal. Another automatic test may be performed when the vehicle first reaches a speed of approximately 6 mph (10 km/h). The brake pedal will pulsate several times and a sound may be audible from the ABS control module, which is normal.

Cleaning the brake discs

Coatings of dirt and water on the brake discs may result in delayed brake function. This delay is minimized by cleaning the brake linings.

Cleaning the brake pads is advisable in wet weather, prior to long-term parking, and after the vehicle has been washed. Do this by braking gently for a short period while the vehicle is moving.

Driving on wet or salted roads

Prolonged driving on wet or salted roads can affect brake function and increase stopping distance. Be sure to keep a safe distance to the vehicle ahead when driving under these conditions.

Brake pad inspection

On vehicles equipped with a jack*, the condition of the brake pads can be checked by raising the vehicle and performing a visual inspection of the brake pads.

 Warning

  • If the vehicle has been driven immediately prior to a brake pad inspection, the wheel hub, brake components, etc., will be very hot. Allow time for these components to cool before carrying out the inspection.
  • Apply the parking brake and put the gear selector in the Park (P) position.
  • Block the wheels standing on the ground, use rigid wooden blocks or large stones.

 Warning

  • Use the jack intended for the vehicle when changing a tire. For any other job, use stands to support the vehicle.
  • The jack should be kept well-greased and clean, and should not be damaged.
  • Be sure the jack is on a firm, level, non-slippery surface.
  • No objects should be placed between the base of jack and the ground, or between the jack and the attachment bar on the vehicle.
  • The jack must correctly engage the jack attachment.
  • Never allow any part of your body to be extended under a vehicle supported by a jack.

Instrument panel symbols

SymbolExplanation

P5-1507-XC90-USA- brake warning symbol1

P5-1507 Symbol Brake red2

Check the brake fluid level. If the level is low, top up and have the system inspected to determine the cause of the loss of fluid.

P5-1507-XC90-USA-ABS warning symbol1

P5-1507 Symbol ABS brake2

Steady glow for 2 seconds when the engine is started: automatic function control.

Steady glow for more than 2 seconds: there is a fault in the ABS system. The normal brake system will still function but without ABS brake modulation.

 Warning

If both symbols illuminate at the same time and the brake level is below the MIN mark in the reservoir or if a brake system-related message is shown in the instrument panel: DO NOT DRIVE. Have the vehicle towed to a trained and qualified Volvo service technician and have the brake system inspected.

If both symbols illuminate at the same time and the brake level is normal (not below the MIN mark in the reservoir) or if a brake system-related message is shown in the instrument panel: drive the vehicle carefully to an authorized Volvo workshop and have the brake system inspected by a trained and qualified Volvo service technician.

  1. * Option/accessory.
  2. 1 US models
  3. 2 Canadian models