System Description

PRE-CRASH SEAT BELT SYSTEM


System Description

- Pre-crash seat belt is adopted to RH/LH seat belts
- Pre-crush seat belt retracts shoulder webbing by a motor in pre-tensioner seat belt with control unit built in motor
- Facilitates an emergency operation by restraining change in occupant posture while emergency braking is being applied, intelligent brake is being activated, or steering wheel is being steered sharply
- Restrains occupant faster and firmly, maximizes the effect of other devices like air bag, and reduces possible damage if a collision is unavoidable
- Provides occupant a sense of ease by pulling occupants body to seat during braking that does not result a collision
- Retracts shoulder webbing and rewinds excessive seat belt slack when occupant is getting in or out of the vehicle, or fastening or unfastening seat belt

FUNCTION DESCRIPTION
Pre-crush seat belt is activated in the conditions as per the following.
- Emergency braking is applied
- Intelligent brake assist is activated
- Steering wheel is turned sharply

OPERATION CONDITION
The activation and deactivation conditions of pre-crush seat belt are as per the following.





Retracts shoulder webbing and rewinds excessive seat belt slack in the conditions as per the following.
- Excessive seat belt slack is completely rewound or rewound for 13 seconds after rewinding starts, which ever comes first, when door opens while the vehicle is stopped
- For 1 second after seat belt is fastened while the door is closed
- Excessive seat belt slack is completely rewound or rewound for 10 seconds after rewinding starts, which ever comes first, after seat belt is unfastened
- Door is closed after seat belt is fastened

NOTE:
Intelligent brake assist. Refer to System Description.

OPERATION PROHIBITION CONDITION
- Seat belt is not fastened (Only the seat belt that is not fastened does not operate)
- At fail-safe condition

MALFUNCTION WARNING
If a system malfunction is detected, it warns the customer by deactivating the retracting function when the seat belt is fastened or unfastened.