When does BLIS function

When does BLIS function  - Blind Spot Information System - Starting and driving - Volvo XC90 Owners Manual - Volvo XC90

The system functions when your vehicle is moving at speeds above 6 mph (10 km/h).

When you pass another vehicle:

The system reacts when you pass another vehicle at a speed of up to 6 mph (10 km/h) faster than that vehicle.

When you are passed by another vehicle:

The system reacts if your vehicle is passed by another vehicle at a speed of up to 43 mph (70 km/h) faster than your vehicle.

WARNING
Х BLIS does not function in sharp curves.
Х BLIS does not function when your vehicle is backing up.
Х If you are towing a wide trailer, this may prevent the BLIS cameras from detecting other vehicles in adjacent lanes.

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