Toyota Yaris Owner's Manual page 107

If the vehicle speed rises above 20 km/h
(12 mph) with the seat belt remaining un-
fastened, the buzzer will sound for 30
seconds. Then, if the seat belt is still
unfastened, the buzzer will sound in a
different tone for 90 more seconds. If the
vehicle speed drops below 20 km/h (12
mph), the buzzer sound will continue. To
stop the buzzer, fasten the seat belt.
If luggage or other load is placed on the
front passenger seat, depending on its
weight and how it is placed on the seat,
built−in sensors in the seat cushion may
detect the pressure, causing the reminder
light to come on.
(d) Charging System Warning Light
This warning light comes on when the
ignition key is turned to the "ON" position,
and goes off when the engine is started.
When there are problems in the charging
system while the engine is running, the
warning light comes on.
100
NOTICE
When the charging system warning
light comes on while the engine is
running, malfunctions such as the en-
gine drive belt being broken may have
occurred. If the warning light comes
on, immediately stop the vehicle in a
safe place and contact your Toyota
dealer.
(e) Low Engine Oil Pressure Warning
Light
This light warns that the engine oil pres-
sure is too low.
If it flickers or stays on while you are
driving, pull off the road to a safe place
and stop the engine immediately. Call a
Toyota dealer or qualified repair shop for
assistance.
The light may occasionally flicker when
the engine is idling or it may come on
briefly after a hard stop. There is no
cause for concern if it then goes out when
the engine is accelerated slightly.
The light may come on when the oil level
is extremely low. It is not designed to
indicate low oil level, and the oil level
must be checked using the level dipstick.
NOTICE
Do not drive the vehicle with the
warning light on—even for one block.
It may ruin the engine.
(f) Malfunction Indicator Lamp
This lamp comes on in the following
cases.
a. There is a problem somewhere in your
engine, automatic transmission electri-
cal system or electronic throttle control
system.
b. The fuel tank is completely empty.
(See "Fuel gauge" on page 94 in this
Section for instructions.)
If it comes on while you are driving in
case a, have your vehicle checked/re-
paired by your Toyota dealer as soon as
possible.
If engine speed does not increase when
the accelerator pedal is depressed, there
may be a problem somewhere in the elec-
tronic throttle control system.