Power brakes function only when theengine is running

Volvo XC90 / Volvo XC90 Owners Manual / Starting and driving / Brake system / Power brakes function only when theengine is running

Power brakes function only when theengine is running - Brake system - Starting and driving - Volvo XC90 Owners Manual - Volvo XC90

The power brakes utilize vacuum pressure which is only created when the engine is running.

Never let the vehicle roll to a stop with the engine switched off.

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 harder than usual.

    See also:

    General information
    Location of the side impact (SIPS) airbags (front seats only) As an enhancement to the structural side impact protection built into your vehicle, it is also equipped with Side Impact Protectio ...

    Maintenance services
    Your Volvo passed several major inspections before it was delivered to you, in accordance with Volvo specifications. The maintenance services outlined in the Warranty and Service Records Informati ...

    Electrical system
    General information 12 volt system with a voltage-regulated alternator. Single pole system in which the chassis and engine block are used as conductors. The negative terminal is connected to the ...