Volvo XC90: Auto-hold braking with driver support - DRIVER SUPPORTVolvo XC90: Auto-hold braking with driver support

The driver support functions Adaptive Cruise Control* and Pilot Assist* have a special brake function in slow traffic and while stationary. In certain situations, the parking brake will be applied to keep the vehicle at a standstill.

Braking function in slow traffic and at a standstill

In slow-moving, stop-and-go traffic or when stopped at a traffic light, driving will resume automatically if the vehicle is stopped for less than approx. 3 seconds. If it takes more than 3 seconds for the vehicle ahead to begin moving again, the driver support function will go into standby mode and the auto-hold brake function will activate.

  • The function can be reactivated by:
    • Pressing the Volvo XC90. Auto-hold braking with driver support button on the steering wheel keypad.
    • Pressing the accelerator pedal.
      • The function will resume following the vehicle ahead if it begins to move within approx. 6 seconds.

WARNING

A noticeable increase in speed may follow when the speed is resumed with the Volvo XC90. Auto-hold braking with driver support steering wheel button.

WARNING

The driver support system only issues a warning for obstacles detected by its radar sensor – thus, a warning may come after a delay or not at all.

  • Never wait for a warning or assistance. Apply the brakes when necessary.

NOTE

Driver support can keep the vehicle stationary for no more than 5 minutes – after that time the parking brake is applied and the function is deactivated.

The parking brake must be released before driver support can be reactivated.

Deactivation of the Auto-hold brake function

In certain situations, auto-hold will be deactivated when the vehicle is at a standstill and the function will go into standby mode. This means that the brakes will be released and the vehicle could begin to roll. The driver must actively apply the brakes to keep the vehicle stationary.

This can occur if:

  • The driver depresses the brake pedal.
  • The parking brake is applied.
  • The gear selector is moved to the P, N or R position.
  • The driver puts Adaptive Cruise Control or Pilot Assist in standby mode.

Auto Activate Parking Brake

The parking brake will be applied if the function is keeping the vehicle stationary using the brakes and:

  • The driver opens the door or unbuckles his/her seat belt.
  • The function has kept the vehicle at a standstill for more than approx. 5 minutes.
  • The brakes overheat.
  • The driver switches off the engine.

* Option/accessory.

Drive modes when using time interval to vehicle
The driver can choose different drive modes to determine how driver support should maintain a time interval to the vehicle ahead. Settings are made using the DRIVE MODE controls. Select one of the following: ...

Lane Keeping Aid
Lane Keeping Aid (LKA1) is designed to actively steer the vehicle on freeways, highways and other major roads to help the driver reduce the risk of the vehicle unintentionally veering out of the lane. ...

See also:

Thermostat. Repair procedures
Removal and Installation Removal of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. Do not remove the thermostat, even if the engine tends to overheat. 1. Drain engine ...

Starter. Components and Components Location
Components 1. Front housing 2. Starter solenoid assembly 3. Lever 4. Lever packing 5. Planet shaft assembly 6. Planetary gear assembly 7. Packing 8. Shield 9. Amature assembly 10. Brush holder assembly ...

Tires and wheels
Tire care For proper maintenance, safety, and maximum fuel economy, you must always maintain recommended tire inflation pressures and stay within the load limits and weight distribution recommended for ...