Lexus 2013 IS250C Owner's Manual page 224

3.5-liter v-6 engine
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2-4. Using other driving systems
The pre-collision system is operational when
Pre-collision seat belt (type A)
• Vehicle speed is above 4 mph (5 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehicle is
greater than 19 to 25 mph (30 to 40 km/h).
• The front occupants are wearing a seat belt.
Pre-collision seat belts (type B)
• Vehicle speed exceeds 19 mph (30 km/h).
• The system detects sudden braking or skidding.
• The front occupants are wearing a seat belt.
Pre-collision brake Assist
• Vehicle speed is above 19 mph (30 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehicle is
greater than 19 to 25 mph (30 to 40 km/h).
• The brake pedal is depressed.
Pre-collision braking:
• The pre-collision braking function is activated.
• Vehicle speed is above 10 mph (1 5 km/h).
• The speed at which your vehicle is approaching the obstacle or the vehicle is
greater than 10 mph (15 km/h).
Situations in which the pre-collision system does not function properly
The system may not function effectively in situations such as the following:
On roads with sharp bends or uneven surfaces
If a vehicle suddenly moves in front of your vehicle, such as at an intersection
If a vehicle suddenly cuts in front of your vehicle, such as when overtaking
In inclement weather such as heavy rain, fog, snow or sand storms
When your vehicle is skidding with the VSC system off
When an extreme change in vehicle height occurs
When the axis of the radar is out of adjustment
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2013 is350cIs 250 c

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