1999 Lexus SC 400 Owners Manual - Page 144
1999 Lexus SC 400 Manual
Page 144 highlights
COMFORT ADJUSTMENT The driver and front passenger's seat belt pretensioners are designed to be activated in response to a severe frontal impact. The airbag system and each pretensioner operates independently because each has its own separate sensor. A pretensioner sensor is located in each front seat belt retractor assembly. When the pretensioner sensor detects the shock of a severe frontal impact, the front seat belt is quickly drawn back in by the retractor so that the belt snugly restrains the front seat occupant. When a seat belt pretensioner is activated, an operating noise may be heard and a small amount of smoke-like gas may be released. This gas is harmless and does not indicate that a fire is occurring. Once the seat belt pretensioner has been activated, the seat belt retractor remains locked. 126