2018 MAZDA MODEL 3 HATCHBACK sensor

▼Wrench Indicator Light
When the ignition is switched ON, the
wrench indicator light is illuminated and
then turns off after a few seconds.

The wrench indicator light is illuminated
when the preset maintenance period
arrives. Verify the content and perform
maintenance.
Refer to Maintenance Monitor on page 6-
16.
▼Low Engine Coolant Temperature
Indicator Light (Blue)
The light illuminates continuously when
the engine coolant temperature is low and
turns off after th
e engine is warm.
If the low engine coolant temperature
indicator light remains illuminated after
the engine has been sufficiently warmed
up, the temperature sensor could have a
malfunction. Consult an Authorized
Mazda Dealer.
When Driving
Instrument Cluster and Display
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Auto-light control*
When the headlight switch is in the position and the ignition is switched ON, the light
sensor senses the surrounding lightness or darkness and automat ically turns the headlights
and other exterior lights on or off.
CAUTION
 Do not shade the light sensor by adhering a sticker or a label on the windshield. Otherwise
the light sensor will not operate correctly.
The light sensor also works as a rain sensor for the auto-wiper control. Keep hands and
scrapers clear of the windshield when the wiper lever is in the
position and the ignition
is switched ON as fingers could be pinched or the wipers and wiper blades could be
damaged when the wipers activate automaticall y. If you are going to clean the windshield,
be sure the wipers are turned off completely wh en it is particularly tempting to leave the
engine running. This is particularly important when clearing ice and snow.
NOTE
The headlights and other exterior lights may not turn off immediately even if the
surrounding area becomes well-lit because the light sensor determines that it is night time
if the surrounding area is continuously dark for several minute s such as inside long
tunnels, traffic jams inside tunn els, or in indoor parking lots.
In this case, the lights turn off if the light switch is turned to the
position.
The sensitivity of the auto-light control may be changed.
Refer to Personalization Features on page 9-12.
When Driving
Switches and Controls
*Some models.4-45
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Auto-wiper control
When the wiper lever is in the
position, the rain sensor senses the amount
of rainfall on the windshield and turns the
wipers on or off automatically
(off―intermittent―low speed―high
speed).

The sensitivity of the rain sensor can be
adjusted by turning the switch on the
wiper lever.
From the center position (normal), rotate
the switch upward for higher sensitivity
(faster response) or rotate it downward for
less sensitivity (slower response).

Higher sensitivity
Less sensitivitySwitch
Center
position
CAUTION
Do not shade the rain sensor by adhering
a sticker or a label on the windshield.
Otherwise the rain sensor will not
operate correctly.
When the wiper lever is in the
position and the igniti on is switched ON,
the wipers may move automatically in
the following cases:
 If the windshield above the rain sensor
is touched or wiped with a cloth.
 If the windshield is struck with a hand
or other object from either outside or
inside the vehicle.
Keep hands and scrapers clear of the
windshield when the wiper lever is in the
position and the ignition is
switched ON as fingers could be pinched
or the wipers and wiper blades damaged
when the wipers activate automatically.
If you are going to clean the windshield,
be sure the wipers are turned off
completely (when it is most likely that the
engine is left running) this is particularly
important when clearing ice and snow.
NOTE
Switching the auto-wiper lever from the
to the position while driving
activates the windshield wipers once,
after which they operate according to
the rainfall amount.
The auto-wiper control may not operate
when the rain sensor temperature is
about
－10 °C (14 °F) or lower, or
about 85 °C (185 °F) or higher.
If the windshield is coated with water
repellent, the rain sensor may not be
able to sense the amount of rainfall
correctly and the auto-wiper control
may not operate properly.
When Driving
Switches and Controls
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If dirt or foreign matter (such as ice or
matter containing salt water) adheres to
the windshield above the rain sensor, or
if the windshield is iced, it could cause
the wipers to move automatically.
However, if the wipers cannot remove
this ice, dirt or foreign matter, the
auto-wiper control will stop operation.
In this case, set the wiper lever to the
low speed position or high speed
position for manual operation, or
remove the ice, dirt or foreign matter by
hand to restore the auto-wiper
operation.
If the auto-wiper lever is left in the
position, the wipers could operate
automatically from the effect of strong
light sources, electromagnetic waves, or
infrared light because the rain sensor
uses an optical sensor. It is
recommended that the auto-wiper lever
be switched to the
position other
than when driving the vehicle under
rainy conditions.
The auto-wiper control functions can be
turned off. Refer to Personalization
Features on page 9-12.
▼ Windshield Washer
Pull the lever toward you and hold it to
spray washer fluid.

Washer
OFF
NOTE
If the windshield wash
er is turned on when
the windshield wipers are not operating,
the windshield wipers operate a few times.
If the washer does no t work, inspect the
fluid level (page 6-27). If the fluid level
is normal, consult a n Authorized Mazda
Dealer.
When Driving
Switches and Controls
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i-ACTIVSENSE
i-ACTIVSENSE is a collective term covering a series of advanced safety and driver support
systems which make use of a Forward Sensing Camera (FSC) and radar sensors. These
systems consist of active safety and pre-crash safety systems.
These systems are designed to assist the driver in safer drivin g by reducing the load on the
driver and helping to avert collisions or reduce their severity . However, because each system
has its limitations, always drive carefully and do not rely sol ely on the systems.
▼Active Safety Technology
Active Safety Technology supports safer driving by helping the
driver to recognize potential
hazards and avert accidents.
Driver awareness support systems
Nighttime visibility
Adaptive Front Lighting System (AFS)..................................................................... page 4-80
High Beam Control System (HBC)............................................................................ page 4-81
Left/right side and rear side detection
Lane Departure War ning System (LDWS)........................... .................................... page 4-113
Blind Spot Monitoring (BSM).................................... ............................................... page 4-84
Road sign recognition
Traffic Sign Recognition System (TSR).......................... .......................................... page 4-90
Inter-vehicle distance recognition
Distance Recogniti on Support System (DRSS)..................... .................................... page 4-96
Rear obstruction detection wh en leaving a parking space
Rear Cross Traffic Alert (RCTA)................................ ............................................... page 4-98
Driver support systems
Inter-vehicle distance
Mazda Radar Cruise Control (MRCC).............................. ...................................... page 4-102
Lane departure
Lane-keep Assist System (LAS).................................. .............................................page 4-113
When Driving
i-ACTIVSENSE
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▼Pre-Crash Safety Technology
Pre-crash safety technology is designed to assist the driver in
averting collisions or reduce
their severity in situations where they cannot be avoided.
Collision damage reduction in low vehicle speed range
Forward driving
Smart City Brake Support (SCBS).......................................................................... page 4-124
Collision damage reduction in medium/high speed range
Smart Brake Support (SBS)..................................................................................... page 4-128
▼Camera and Sensors
Forward Sensing Camera (FSC)
The Forward Sensing Camera (FSC) detects lane indications and r
ecognizes headlights,
taillights and city lights during nighttime driving. In addition, it also detects the vehicle
ahead, pedestrians, or obstructions. The following systems also use the Forward Sensing
Camera (FSC).
High Beam Control system (HBC)
Lane-keep Assist System (LAS) & Lane Departure Warning System ( LDWS)
Traffic Sign Recognition System (TSR)
Smart City Brake Support (SCBS)
Smart Brake Support (SBS)
The Forward Sensing Camera (FSC) is installed at the top of the windshield near the
rearview mirror.
Refer to Forward Sensing Camera (FSC) on page 4-131.
Radar sensor (front)
The radar sensor (front) function s by detecting the radio waves reflected off a vehicle ahead
sent from the radar sensor. The following systems also use the radar sensor (front).
Mazda Radar Cruise Control (MRCC)
Distance Recognition Support System (DRSS)
Smart Brake Support (SBS)
The radar sensor (front) is moun ted behind the radiator grille.
Refer to Radar S ensor (Front) on page 4-136.
When Driving
i-ACTIVSENSE
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Radar sensors (rear)
The radar sensors (rear) function by detecting the radio waves reflected off a vehicle
approaching from the rear or an obstruction sent from the radar sensors. The following
systems also use the radar sensors (rear).
Blind Spot Monitoring (BSM)
Rear Cross Traffic Alert (RCTA)
The radar sensors (rear) are installed inside the rear bumper, one each on the left and right
sides.
Refer to Radar Sensors (Rear) on page 4-139.
When Driving
i-ACTIVSENSE
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NOTE
The BSM will operate when all of the following conditions are met:
The ignition is switched ON.
The BSM OFF indicator light in the instrument cluster is turned off.
The vehicle speed is about 10 km/h (6.3 mph) or faster.
The BSM will not operate under the following circumstances.
The vehicle speed falls below about 10 km/h (6.3 mph) even though the BSM OFF
switch indicator light is turned off.
The shift lever (manual transa xle)/selector lever (automatic transaxle) is shifted to
reverse (R) and the vehicle is reversing.
The turning radius is small (making a sharp turn, turning at intersections).
In the following cases, the BSM warning indication/warning light turns on and operation
of the system is stopped. If the BSM warning indication/warning light remains
illuminated, have the vehicle inspected at an Authorized Mazda Dealer as soon as
possible.
Some problem with the system including the BSM warning indicator lights is detected.
A large deviation in the installation position of a radar sensor (rear) on the vehicle has
occurred.
There is a large accumulation of snow or ice on the rear bumper near a radar sensor
(rear). Remove any snow, ice or mud on the rear bumper.
Driving on snow-covered roads for long periods.
The temperature near the radar sensors (rear) becomes extremely hot due to driving for
long periods on slopes during the summer.
The battery voltage has decreased.
Under the following conditions, the radar sensors (rear) cannot detect target objects or it
may be difficult to detect them.
A vehicle is in the detection area at the rear in an adjacent driving lane but it does not
approach. The BSM determines the condition based on radar detection data.
A vehicle is traveling alongside your vehicle at nearly the same speed for an extended
period of time.
Vehicles approaching in the opposite direction.
A vehicle in an adjacent driving lane is attempting to pass your vehicle.
A vehicle is in an adjacent lane on a road with extremely wide driving lanes. The
detection area of the radar sensors (rear) is set at the road width of expressways.
When Driving
i-ACTIVSENSE
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