
7–19
If Trouble Arises
Overheating
Overheating
If the high engine coolant temperature
warning light illuminates, the vehicle loses
power, or you hear a loud knocking or
pinging noise, the engine is probably too
hot.
WARNING
Pull over to a safe location, then
switch the ignition off and make sure
the fan is not running before attempting
to work near the cooling fan:Working near the cooling fan when it
is running is dangerous. The fan could
continue running indefinitely even if
the engine has stopped and the engine
compartment temperature is high. You
could be hit by the fan and seriously
injured.
Do not remove either cooling
system cap when the engine and
radiator are hot:When the engine and radiator are hot,
scalding coolant and steam may shoot
out under pressure and cause serious
injury.
Open the hood ONLY after steam is no
longer escaping from the engine: Steam from an overheated engine is
dangerous. The escaping steam could
seriously burn you.
If the high engine coolant temperature
warning light illuminates:
1. Drive safely to the side of the road and
park off the right-of-way.
2. Put a vehicle with an automatic
transaxle in park (P), a manual
transaxle in neutral.
3. Apply the parking brake.
4. Turn off the air conditioner.
5. Check whether coolant or steam is
escaping from the engine compartment.
If steam is coming from the engine
compartment:
Do not go near the front of the vehicle.
Stop the engine.
Wait until the steam dissipates, then
open the hood and start the engine.
If neither coolant nor steam is
escaping:
Open the hood and idle the engine until
it cools.
CAUTION
If the cooling fan does not operate
while the engine is running, the engine
temperature will increase. Stop the
engine and call an Authorized Mazda
Dealer.
6. Make sure the cooling fan is operating,
then turn off the engine after the
temperature has decreased.
7. When cool, check the coolant level.
If it is low , look for coolant leaks from
the radiator and hoses.
Mazda3_8FA4-EA-15G_Edition3.indb 192015/12/04 19:25:44

7–24
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
If a Warning Light Turns On or Flashes
If any warning light turns on/flashes, take appropriate action for each light. There is no
problem if the light turns off, however if the light does not turn off or turns on/flashes again,
consult an Authorized Mazda Dealer.
(Vehicles with type B audio)
The warning contents can be verified on the audio.
1. Select the icon on the home screen to display the applications screen.
2. Select the “Warning Guidance”.
Stop Vehicle in Safe Place Immediately
If any of the following warning lights turns on, the system may have a m\
alfunction. Stop the
vehicle in a safe place immediately and contact an Authorized Mazda Dealer.
Signal Warning
Brake System Warning Light
This warning has the following functions:
Parking brake warning/Warning light inspection
The light illuminates when the parking brake is applied with the ignitio\
n switched to
START or ON. It turns off when the parking brake is fully released.
Low brake fluid level warning
If the brake warning light remains illuminated even though the parking b\
rake is
released, the brake fluid may be low or there could be a problem with the brake system.
Park the vehicle in a safe place immediately and contact an Authorized Mazda Dealer.
WARNING
Do not drive with the brake system warning light illuminated. Contact an Authorized Mazda Dealer to have the brakes inspected as soon as possible:
Driving with the brake system warning light illuminated is dangerous. It indicates
that your brakes may not work at all or that they could completely fail at any
time. If this light remains illuminated, after checking that the parking brake is fully
released, have the brakes inspected immediately.
CAUTION
In addition, the effectiveness of the braking may diminish so you may need to depress the brake pedal more strongly than normal to stop the vehicle.
Mazda3_8FA4-EA-15G_Edition1.indb 242015/05/11 14:02:42

7–25
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
SignalWarning
Electronic Brake Force Distribution System
Warning If the electronic brake force distribution control unit determines that \
some components
are operating incorrectly, the control unit may illuminate the brake system warning
light and the ABS warning light simultaneously. The problem is likely to be the
electronic brake force distribution system.
WARNING
Do not drive with both the ABS warning light and brake warning light illuminated. Have the vehicle towed to an Authorized Mazda Dealer to have the brakes
inspected as soon as possible:
Driving when the brake system warning light and ABS warning light are
illuminated simultaneously is dangerous.
When both lights are illuminated, the rear wheels could lock more quickly in an
emergency stop than under normal circumstances.
Charging System Warning Light If the warning light illuminates while driving, it indicates a malfuncti\
on of the
alternator or of the charging system.
Drive to the side of the road and park off the right-of-way. Consult an Authorized
Mazda Dealer.CAUTION
Do not continue driving when the charging system warning light is illuminated because the engine could stop unexpectedly.
Engine Oil Warning LightThis warning light indicates low engine oil pressure.
CAUTION
Do not run the engine if the oil pressure is low. Otherwise, it could result in extensive engine damage.
If the light illuminates or the warning indication is displayed while dr\
iving:
1.Drive to the side of the road and park off the right-of-way on level ground.
2.Turn off the engine and wait 5 minutes for the oil to drain back into the oil p\
an.
3.Inspect the engine oil level 6-30. If it's low, add the appropriate amount of engine
oil while being careful not to overfill.
CAUTION
Do not run the engine if the oil level is low. Otherwise, it could result in extensive engine damage.
4.Start the engine and check the warning light.
If the light remains illuminated even though the oil level is normal or \
after adding oil,
stop the engine immediately and have your vehicle towed to an Authorized Mazda
Dealer.
Mazda3_8FA4-EA-15G_Edition1.indb 252015/05/11 14:02:42