Toyota Yaris: If a Warning Light Turns On or Flashes / Taking Action
Take the appropriate action and verify that the warning light turns off.


KEY Warning Light
Take the appropriate action and verify that the warning light turns
off.

Low Fuel Warning Light
The light illumination timing may vary because fuel inside the fuel tank
moves
around according to the driving conditions and the vehicle posture.
Seat Belt Warning Light
- The warning light flashes for about 6 seconds if the driver’s seat belt
is not
fastened when the ignition is switched ON.
- To allow the front passenger occupant classification sensor to function
properly, do not place and sit on an additional seat cushion on the front
passenger’s seat. The sensor may not function properly because the
additional
seat cushion could cause sensor interference.
- If a small child is seated on the front passenger’s seat, the warning
light may
not operate.
Tire Pressure Monitoring System Warning Light
- Perform tire pressure adjustment when the tires are cold. Tire pressure
will vary according to the tire temperature, therefore let the vehicle stand
for 1 hour or only drive it 1 mile (1.6 km) or less before adjusting the
tire
pressures. When pressure is adjusted on hot tires to the cold inflation
pressure, the TPMS warning light/beep may turn on after the tires cool
and pressure drops below specification.
- Also, an illuminated TPMS warning light, resulting from the tire air
pressure dropping due to cold ambient temperature will remain illuminated
even if the ambient temperature rises. In this case, it will also be
necessary to adjust the tire air pressures. If the TPMS warning light
illuminates
due to a drop in tire air pressure, make sure to check and adjust the tire
air pressures.
- Tires lose air naturally over time and the TPMS cannot tell if the tires
are
getting too soft over time or you have a flat. However, when you find one
low tire in a set of four-that is an indication of trouble; you should have
someone drive the vehicle slowly forward so you can inspect any low
tire for cuts and any metal objects sticking through tread or sidewall. Put
a few drops of water in the valve stem to see if it bubbles indicating a
bad valve. Leaks need to be addressed by more than simply reinflating
the tire as leaks are dangerous - take it to your Toyota dealer.
WARNING
If the tire pressure monitoring system warning light illuminates or
flashes, or the tire pressure warning beep sound is heard, decrease
vehicle speed immediately and avoid sudden maneuvering and
braking
If the tire pressure monitoring system warning light illuminates or
flashes, or the tire pressure warning beep sound is heard, it is dangerous to
drive the vehicle at high speeds, or perform sudden maneuvering
or braking. Vehicle drivability could worsen and result in an accident.
To determine if you have a slow leak or a flat, pull over to a safe
position
where you can check the visual condition of the tire and determine if you
have enough air to proceed to a place where air may be added and the
system monitored again by your Toyota dealer or a tire repair station.
Do not ignore the TPMS Warning Light
Ignoring the TPMS warning light is dangerous, even if you know why it
is illuminated. Have the problem taken care of as soon as possible
before it develops into a more serious situation that could lead to tire
failure and a dangerous accident.
If any of the following warning lights turns on/flashes, the system may
have a malfunction. Contact your Toyota dealer to have your vehicle
inspected...
Other information:
BEFORE STARTING TARGET ADJUSTMENT CAUTION / NOTICE / HINT NOTICE: When replacing the windshield glass of a vehicle equipped with a forward recognition camera, make sure to use a Toyota genuine part. If a non-Toyota genuine part is used, the forward recognition camera may not be able to be installed due to a missing bracket or the pre-collision system may not operate properly due to a difference in the transmissivity of the windshield glass or the shape of the black ceramic border...
DESCRIPTION Detection Item Symptom Trouble Area Engine Stop and Start ECU Communication Stop Mode Communication stop for "Stop and Go/Start" is indicated on the "Communication Bus Check" screen of the GTS. Click here
Engine stop and start ECU branch line or connector
Power source circuit of engine stop and start ECU
Engine stop and start ECU ground circuit
Engine stop and start ECU
WIRING DIAGRAM
CAUTION / NOTICE / HINT CAUTION: When performing the confirmation driving pattern, obey all speed limits and traffic laws...