Changing target vehicles and automatic braking with Adaptive Cruise Control (ACC)

At certain speeds, Adaptive Cruise Control can change target vehicles and automatically apply the brakes.

Changing target vehicles

P5-1507-ACC RadarSensorTargetChange
If the target vehicle turns suddenly, there may be a stationary vehicle ahead

When ACC is actively following another vehicle at speeds under 20 mph (30 km/h) and changes targets from a moving vehicle to a stationary one, the system will brake for the stationary vehicle.

 Warning

At speeds above 20 mph (30 km/h), if ACC changes targets from a moving vehicle to a stationary one, the system will not react to the stationary vehicle and will accelerate to the previously set speed.

The driver must actively apply the brakes to slow/stop the vehicle.

Automatic standby mode when changing targets

ACC disengages and goes into standby mode if:
  • your vehicle's speed goes below approx. 3 mph (5 km/h) and ACC cannot determine if the target object is a stationary vehicle or some other type of object such as a speed bump, etc
  • the vehicle's speed goes below approx. 3 mph (5 km/h) and the vehicle ahead changes lanes or turns so that ACC no longer has a target vehicle to follow.

Auto-hold brake function

In slow-moving, stop-and-go traffic or when stopped at a traffic light, driving will resume automatically if the vehicle is not stopped for more than approx. 3 seconds. If it takes more than 3 seconds for the vehicle ahead to begin moving again, ACC will go into standby mode and the auto-hold brake function will activate.

The driver will then have to reactivate ACC in one of the following ways:
  • Press the P5-1507-Symbol 5x3,5-CC rattknapp Återuppta hastighet button on the left-side steering wheel keypad.
  • Press the accelerator pedal.
ACC will resume following the vehicle ahead (target vehicle) if it begins to move within approx. 6 seconds.

 Note

ACC can keep the vehicle at a standstill for up to 5 minutes, after which the parking brake will be set and ACC will go into standby mode.

The parking brake has to be released before ACC 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 ACC will go into standby mode.

This means that the brakes will be released and the vehicle can begin to roll.

The driver must actively apply the brakes to keep the vehicle at a standstill.

This can occur in the following situations:
  • the driver presses the brake pedal
  • the parking brake is set
  • the gear selector is moved to the P, N or R positions
  • the driver puts ACC in standby mode.

Automatically setting the parking brake

In certain situations, the parking brake is set automatically to help keep the vehicle at a standstill.

This occurs if ACC keeps the vehicle at a standstill with the brakes and:
  • the driver unbuckles the seat belt or opens the door
  • ACC has kept the vehicle at a standstill for more than approx. 5 minutes
  • the brakes overheat
  • the engine is turned off.