Chevrolet Optra 2004 Owner's Manual page 136

Safety Belt Reminder Light
If the driver's belt is already buckled, the light will not
come on.
Safety Belt Reminder Tone
If your vehicle has this feature, a tone will sound for
several seconds when the ignition is turned to ON
to remind people to fasten their safety belts. The tone
will not sound if the driver's safety belt is already
buckled.
3-28
The safety belt light will
come on and stay on until
the driver's safety belt
is buckled.
Air Bag Readiness Light
There is an air bag readiness light on the instrument
panel cluster, which shows the air bag symbol.
The system checks the air bag's electrical system for
malfunctions. The light tells you if there is an electrical
problem. The system check includes the air bag
sensor, the air bag modules, the wiring and the crash
sensing and diagnostic module. For more information on
the air bag system, see Air Bag Systems on page 1-51.
If the air bag readiness light stays on after you start the
vehicle or comes on when you are driving, your air
bag system may not work properly. Have your vehicle
serviced right away.
This light will come on
when you start your
vehicle, and it will flash for
a few seconds. Then the
light should go out. This
means the system is ready.