Lexus LX 470 Owner's Manual page 132

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COMFORT ADJUSTMENT
16X026b
This indicator comes on when the ignition key is turned to
the "ACC" or "ON" position. It goes off after about 6
seconds. This means the front seat belt pretensioners are
operating properly.
This warning light system monitors the airbag sensor
assembly, front airbag sensors, front seat belt pretensioner
assembly, warning light, interconnecting wiring and power
sources. (For details, see "Service reminder indicators and
warning buzzers" on page 41.)
116
16X254
" 1 Seat belt pretensioner assemblies
2 SRS warning light
3 Airbag sensor assembly
4 Front airbag sensors
The front seat belt pretensioner system consists mainly of the
above components, and their locations are shown in the
illustration.
The front seat belt pretensioners are controlled by the airbag
sensor assembly. The airbag sensor assembly consists of a
safing sensor and airbag sensor.
When the front seat belt pretensioners are 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 front seat belt pretensioners have been activated, the
seat belt retractors remain locked.

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