warning lights MAZDA MODEL 3 HATCHBACK 2021 Service Manual

Parking in an Emergency
▼Parking in an Emergency
The hazard warning lights should
always be used when you stop on or
near a roadway in an emergency.

The hazard warning lights warn other
drivers that your vehicle is a tra
ffic
hazard and that they must take
extreme caution when near it.

Depress the hazard warning flasher
and all the turn signals will flash. The
hazard warning indicator lights in the
instrument cluster flash simultaneously.
NOTE
The turn signals do not work when
the hazard warning lights are on.
Check local regulations about the
use of hazard warning lights while
the vehicle is being towed to verify
that it is not in violation of the law.
If Trouble Arises
Parking in an Emergency
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If a Warning Light TurnsOn or Flashes
▼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
o ff, however if the light does not turn
o ff or turns
on/flashes again, consult
an Authorized Mazda Dealer.
The details for some warnings can be
viewed on the center display or
multi-information display in the
instrument cluster.
Center display
1. Select “Information” on the home screen.
2. Select “Vehicle Status Monitor”.
3. Select the applicable warning to view the warning details.
NOTE
You can also display the currently
occurring warning by sliding the
commander knob to the left while on
the home screen of the center display.
Multi-information display
1. Press the INFO switch on thesteering switch to display the
warning indication screen.
Refer to Multi-information Display
on page 4-14.
▼Brake System Warning Indication/
Warning Light
This warning has the following
functions:
Warning light inspection
For an operation check, make sure that
the light turns on when the ignition is
switched on, and turns o
ff a few
seconds later or when the engine is
started.
When the light turns on
If the brake system warning light
remains illuminated 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.
Refer to Inspecting Brake/Clutch Fluid
Level on page 6-21.
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.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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CAUTION
In addition, the
eff ectiveness of the
braking may diminish so you may
need to depress the brake pedal
more strongly than normal to stop
the vehicle.

▼ 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 brake
system warning light and ABS 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
Indication/Warning Light
If the warning light illuminates while
driving , it indicates a malfunction of
the alternator or of the charging
system.
Drive to the side of the road and park
o
ff 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 Indication/
Warning Light
This 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 driving:
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 pan.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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3. Inspect the engine oil level (page6-19). If it's low, add the
appropriate amount of engine oil
while being careful not to over fill.
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.
▼ High Engine Coolant Temperature
War n in g I nd ic at ion
Displays if the engine coolant
temperature has increased excessively.
“Elevated Engine Coolant Temp. Drive
Slowly” displayed
Drive slowly to reduce engine load
until you can
find a safe place to stop
the vehicle and wait for the engine to
cool down.
“Excessive Engine Coolant Temp. Stop
the Vehicle in a Safe Location”
displayed
This indicates the possibility of
overheating. Park the vehicle in a safe
place immediately and stop the
engine.
Refer to Overheating on page 7-21.
CAUTION
Do not drive the vehicle with the high
engine coolant temperature warning
light illuminated. Otherwise, it could
result in damage to the engine.
▼ Power Steering Malfunction
Indication/Indicator Light
The message is displayed if the electric
power steering has a malfunction.
If the message is displayed, stop the
vehicle in a safe place and do not
operate the steering wheel. There is no
problem if the indication turns o
ff
when the engine is restarted after
some time has passed. If the indication
displays even after the engine is
restarted, contact an Authorized
Mazda Dealer if the message is
displayed continuously.
NOTE
If the message is displayed, the
power steering will not operate
normally. In this case, the steering
wheel can still be operated,
however, the operation may feel
heavy compared to normal, or the
steering wheel could vibrate when
turning.
Repeatedly jerking the steering
wheel left and right while the vehicle
is stopped or moving extremely
slowly will cause the power steering
system to go into protective mode
which will make the steering feel
heavy, but this does not indicate a
problem. If this occurs, park the
vehicle safely and wait several
minutes for the system to return to
normal.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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▼ABS Warning Indicat ion/Warning
Light
If the ABS warning light stays on while
you're driving , the ABS control unit has
detected a system malfunction. If this
occurs, your brakes will function
normally as if the
vehicle had no ABS.
Should this happen, consult an
Authorized Mazda Dealer as soon as
possible.
NOTE
When the engine is jump-started to
charge the battery, uneven rpm
occurs and the ABS warning light
may illuminate. If this occurs, it is the
result of the weak battery and does
not indicate an ABS malfunction.
Recharge the battery.
The brake assist system does not
operate while the ABS warning light
is illuminated.
▼ Master Warning Indication
The indication displays if the system
has a malfunction.
Check the reason for the indication
displaying on the center display or
multi-information display.
Refer to If a Warning Light Turns On or
Flashes on page 7-27.
▼
Brake Control System Warning
Indication/Warning Light
The warning light illuminates when the
system has a malfunction. Have your
vehicle inspected at an Authorized
Mazda Dealer.
▼Electric Parking Brake (EPB)
Indication/Indicator Light
This warning has the following
functions:
Parking brake warning/Indicator light
inspection
The light illuminates when the parking
brake is applied with the ignition
switched to START or ON. It turns
off
when the parking brake is released.
When the light is flashing
The light flashes if the Electric Parking
Brake (EPB) has a malfunction. If the
light remains flashing even if the
Electric Parking Brake (EPB) switch is
operated, consult an Authorized
Mazda Dealer as soon as possible.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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▼Brake Override Warning Indication
This message is displayed when the
accelerator pedal and brake pedal are
depressed at the same time while
driving.
Release the accelerator pedal and
depress the brake pedal.
▼Check Engine Indication/Light
If this light illuminates while driving ,
the vehicle may have a problem. It is
important to note the driving
conditions when the light illuminated
and consult an Authorized Mazda
Dealer.
The check engine light may illuminate
in the following cases:
The engine's electrical system has a
problem.
The emission control system has a
problem.
The fuel-
filler cap is missing or not
tightened securely.
The fuel tank level being very low or
approaching empty.
If the check engine light remains on, or
it flashes continuously , do not drive at
high speeds and consult an Authorized
Mazda Dealer as soon as possible.
WARNING
If the check engine light turns on, do
not disconnect the battery cables.
If the battery cables are disconnected
and then reconnected, the engine
could be damaged and catch on fire.
▼Automatic Transmission Warning
Indication/Warning Light*
The indication/light illuminates when
the transmission has a problem.
CAUTION
If the automatic transmission warning
indication/light illuminates, the
transmission has an electrical problem.
Continuing to drive your Mazda in this
condition could cause damage to your
transmission. Consult an Authorized
Mazda Dealer as soon as possible.
▼
AWD Warning Indication/
Warning Light*
“AWD Malfunction. Front Wheel
Drive Only. Have the Vehicle
Inspected” is displayed/When the
light is turned on
The indication is displayed/the light
turns on under the following
conditions. The system may have a
malfunction. Have the vehicle checked
at an Authorized Mazda Dealer.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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When there is a malfunction in the
AWD system.
“Excessive AWD System Load. Drive
Slowly Until Warning Light Turns Off .
Vehicle Now in Front Wheel Drive” is
displayed/When the light is flashing
The indication is displayed/the light
flashes under the following conditions.
Park the vehicle in a safe place and
check that the warning indication light
turns off / the warning light stops
fl ashing, and then drive the vehicle.
Contact an Authorized Mazda Dealer
if the indication is continuously
displayed.
When the differential oil temperature
is excessively high.
When there is a large difference
between the front and rear wheel
rotation, such as when trying to
remove the vehicle from mud.
“Mismatched Tire Diameters. Vehicle
Now in Front Wheel Drive” is
displayed/When the light is turned on
The indication is displayed/the light
turns on under the following
conditions. Inspect the tire sizes or tire
pressures on all 4 wheels. Contact an
Authorized Mazda Dealer if the
indication remains on or the warning
light remains illuminated.
When any of the tire diameter is di fferent.
When any of the tire pressure is
incorrect.
▼ TCS/DSC Indication/Indicator
Light (Turns on)
If the light stays on, the TCS, DSC or
the brake assist system may have a
malfunction and they
may not operate
correctly. Take your vehicle to an
Authorized Mazda Dealer.
▼ Air Bag/Front Seat Belt
Pretensioner System Warning
Indication/Warning Light
A system malfunction is indicated if the
warning light constantly
flashes,
constantly illuminates or does not
illuminate at all when the ignition is
switched ON. If any of these occur,
consult an Authorized Mazda Dealer
as soon as possible. The system may
not operate in an accident.
WARNING
Never tamper with the air bag/
pretensioner systems and always have
an Authorized Mazda Dealer perform
all servicing and repairs:
Self-servicing or tampering with the
systems is dangerous. An air bag/
pretensioner could accidentally
activate or become disabled causing
serious injury or death.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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▼Tire Pressure Monitoring System
(TPMS) Warning Indication/
Warning Light (Flashing)
If there is a problem with the TPMS or
the voltage of a tire pressure sensor
decreases, the TPMS warning light
fl
ashes and a message is displayed on
the multi-information display. Have
your vehicle inspected by an
Authorized Mazda Dealer.
WARNING
Do not drive the vehicle at high
speeds if the TPMS warning light turns
on or fl ashes:
Driving the vehicle at high speeds
while the TPMS warning light is turned
on or fl ashing is dangerous because
the brake performance and the
steering wheel operability will be
reduced. If the vehicle is driven at high
speeds or the brakes are suddenly
applied, it could lead to an accident.
Gradually apply the brakes to lower the
vehicle's speed.
Do not ignore the TPMS warning light
when it is turned on or flashing:
Continuing to drive the vehicle while
ignoring the illumination/ flashing of
the TPMS warning light is dangerous
because a tire may burst which could
lead to an accident. Take appropriate
measures as soon as possible.
▼ KEY Warning Indication/Warning
Light (Red)
“Keyless Entry System Malfunction.
Have the Vehicle Inspected” is
displayed
This message is displayed if the
advanced keyless entry & push button
start system has a problem.
Contact an Authorized Mazda Dealer.
CAUTION
If the message is indicated, or the push
button start indicator light (amber)
fl
ashes, the engine may not start. If the
engine cannot be started, try starting it
using the emergency operation for
starting the engine, and have the
vehicle inspected at an Authorized
Mazda Dealer as soon as possible.
Refer to Emergency Operation for
Starting the Engine on page 4-9.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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“Key Not Detected” is displayed
If the presence of the key cannot be
detected (dead battery, battery
malfunction, no key), it is displayed
when the driver attempts to start the
engine (push button start operation,
brake pedal depression).
Displayed when it is determined that
a key that was in the vehicle has
been removed from the vehicle. (Key
taken out warning. Other thanIG -OFF).
▼ Security Indicator Light
If the security indicator light
flashes
continuously while you are driving , do
not shut o ff the engine. Go to an
Authorized Mazda Dealer and have it
checked. If the engine is shut o ff while
the indicator light is flashing, you will
not be able to restart it.
Make sure the key is within the
operational range for signal
transmission. Switch the ignition o ff,
and then restart the engine. If the
engine does not start after 3 or more
tries, contact an Authorized Mazda
Dealer.
NOTE
Because the electronic codes are reset
when the immobilizer system is
repaired, the keys are needed. Make
sure to bring all the keys to an
Authorized Mazda Dealer so that they
can be programmed.
▼ High Beam Control System (HBC)
Warning Indication/Warning Light
(Amber)
*
The light remains turned on if there is a
problem with the system. Have your
vehicle inspected at an Authorized
Mazda Dealer.
▼i-ACTIVSENSE Warning
Indication/Warning Light*
The indication displays if the system
has a malfunction.
Check the reason for the indication
displaying on the center display or
multi-information display.
Refer to If a Warning Light Turns On or
Flashes on page 7-27.
▼Exterior Light Warning Indication/
Warning Light
This light illuminates if there is a
malfunction in the exterior lights
(except license plate lights). Have your
vehicle inspected by an Authorized
Mazda Dealer.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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CAUTION
Do not drive the vehicle while an
exterior light has a malfunction. Poor
visibility, and not being able to signal
braking and turns may cause an
accident. In addition, if the vehicle is
driven with the lights not turned on, it
may conflict with laws and regulations
due to poor maintenance.
▼ Low Fuel Warning Indication/
Warning Light
The warning indication/warning light
displays/turns on when the ignition is
switched ON and the remaining fuel is
about 9 L (2.3 US gal, 1.9 Imp gal) or
the remaining distance to empty is 50
km (31 miles) or shorter. The warning
light
flashes when the vehicle
continues to be driven with the
warning indication/warning light
displayed/turned on and the
remaining fuel in the tank is near
empty.
NOTE
The light illumination timing may vary
because fuel inside the fuel tank moves
around according to the driving
conditions and the vehicle posture.
Action to be taken
Add fuel. If the light is flashing, refuel
as soon as possible.
▼ Check Fuel Cap Warning
Indication/Warning Light
If the check fuel cap warning light
illuminates while driving, the
fuel-filler
cap may not be installed properly.
Action to be taken
Stop the engine and reinstall the
fuel- filler cap.
Refer to Refueling on page 3-28.
▼ Engine Oil Level Warning
Indication/Warning Light
This warning light indicates that the
engine oil level is around the MIN
mark (page 6-19).
CAUTION
Do not continue to drive the vehicle
with the engine oil level warning
indication/warning light displayed/
turned on. If the vehicle continues to
be driven with an
insufficient amount
of engine oil, it could cause damage to
the engine.
Action to be taken
Add 1 L (0.26 US gal, 0.22 Imp gal) of
engine oil (page 6-17).
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
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