Get When Driving -> Start/Stop Engine Guide for Mazda 3 4 Door Fourth Generation (2019-2026)

When Driving

Start/Stop Engine

Oꢀ

Ignition Switch

The power supply to electrical devices

turns oꢀ and the indicator light

(amber) also turns oꢀ.

Push Button Start Positions

▼

The system operates only when the key

is within operational range.

WARNING

Each time the push button start is

pressed, the ignition switches in the

order of oꢀ, ACC, and ON. Pressing

the push button start again from ON

switches the ignition oꢀ.

Before leaving the driver's seat,

always switch the ignition oꢀ, set the

parking brake, and make sure the

selector lever is in P (automatic

transmission) position or in 1st gear

or R (manual transmission):

Leaving the driver's seat without

switching the ignition oꢀ, setting the

parking brake, and shifting the selector

lever to P (automatic transmission)

position or to 1st gear or R (manual

transmission) is dangerous.

Unexpected vehicle movement could

occur which could result in an

accident.

1. Indicator light

In addition, if your intention is to leave

the vehicle for even a short period, it is

important to switch the ignition oꢀ, as

leaving it in another position will

disable some of the vehicle's security

systems and run the battery down.

2. Push button start

NOTE



The engine starts by pressing the

push button start while depressing

the clutch pedal (manual

transmission) or the brake pedal

(automatic transmission). To switch

the ignition position, press the push

button start without depressing the

pedal.

ACC (Accessory)

Some electrical accessories will

operate and the indicator light (amber)

illuminates.



Do not leave the ignition switched

NOTE

ON while the engine is not running.

Doing so could result in the battery

going dead. If the ignition is left in

ACC (For automatic transmission,

the selector lever is in the P position,

and the ignition is in ACC), the

ignition switches oꢀ automatically

after about 25 minutes.

The keyless entry system does not

function while the push button start

has been pressed to ACC, and the

doors will not lock/unlock even if they

have been locked manually.

4-4

When Driving

Start/Stop Engine

ON

Starting the Engine

This is the normal running position

after the engine is started. The

indicator light (amber) turns oꢀ. (The

indicator light (amber) illuminates

when the ignition is switched ON and

the engine is not running.)

Some indicator lights/warning lights

should be inspected before the engine

is started.

Refer to Warning/Indicator Lights on

page 4-29.

Refer to Indication/Indicator Lights on

page 4-31.

Starting the Engine

▼

WARNING

Radio waves from the key may aꢀect

medical devices such as pacemakers:

Before using the key near people who

use medical devices, ask the medical

device manufacturer or your physician

if radio waves from the key will aꢀect

the device.

NOTE

When the push button start is pressed

to ON, the sound of the fuel pump

motor operating near the fuel tank can

be heard. This does not indicate an

abnormality.



The key must be carried because the

key carries an immobilizer chip that

must communicate with the engine

controls at short range.



The engine can be started when the

push button start is pressed from oꢀ,

ACC, or ON.

The push button start system



functions (function which can start

the engine by only carrying the key)

can be deactivated to prevent any

possible adverse eꢀect on a user

wearing a pacemaker or other

medical device. If the system is

deactivated, you will be unable to

start the engine by carrying the key.

Consult an Authorized Mazda Dealer

for details. If the push button start

system functions have been

deactivated, you can start the engine

by following the procedure indicated

when the key battery goes dead.

Refer to Engine Start Function When

Key Battery is Dead on page 4-8.



After starting a cold engine, the

engine speed increases and a

whining sound from the engine

compartment can be heard.

4-5

When Driving

Start/Stop Engine

This is for improved exhaust gas

puriﬁcation and does not indicate

any parts defect.

6. Make sure that the KEY indicator

light (green) in the instrument

cluster and push button start

indicator light (green) turns on.



Engine-starting is controlled by the

spark ignition system.

This system meets all Canadian

Interference-Causing Equipment

Standard requirements regulating the

impulse electrical ﬁeld strength of

radio noise.

1. Make sure you are carrying the key.

2. Occupants should fasten their seat

belts.

3. Make sure the parking brake is on.

4. Continue to depress the brake

pedal ﬁrmly until the engine has

completely started.

5. (Manual transmission)

Continue to depress the clutch

pedal ﬁrmly until the engine has

completely started.

1. Indicator light

2. Push button start

NOTE



If the push button start indicator

light (green) ﬂashes, make sure

that the key is being carried.

If the push button start indicator



(Automatic transmission)

Put the vehicle in park (P). If you

must restart the engine while the

vehicle is moving, shift into neutral

(N).

light (green) ﬂashes with the key

being carried, touch the key to

the push button start and start

the engine.

Refer to Engine Start Function

When Key Battery is Dead on

page 4-8.

NOTE



(Manual transmission)

The starter will not operate if the

clutch pedal is not depressed

suꢁciently.

CAUTION



(Automatic transmission)

If the KEY warning indication (red)

is displayed, or the push button

start indicator light (amber) ﬂashes,

this could indicate a problem with

the engine starting system. This may

prevent the engine from starting or

from switching the ignition to ACC

or ON.

The starter will not operate if the

selector lever is not in P or N

position and the brake pedal is

not depressed suꢁciently.

Refer to KEY Warning Indication/

Warning Light (Red) on page

7-34.

4-6

When Driving

Start/Stop Engine



Have your vehicle inspected at an

Authorized Mazda Dealer as soon

as possible.

When the engine is force-started,

the KEY warning indication (red)

remains displayed and the push

button start indicator light

(amber) remains ﬂashing.

(Automatic transmission)

When the selector lever is in the

neutral (N) position, the push

button start indicator light (green)

does not turn on.

NOTE



Under the following conditions,

the KEY warning indication (red)

is displayed after the push button

start is pressed. This informs the

driver that the push button start

will not switch to ACC, even if it

is pressed from oꢀ (page 7-34).

7. Press the push button start after the

push button start indicator light

(green) turns on.



The key battery is dead.

The key is out of operational

NOTE



After starting the engine, the push

button start indicator light

range.



The key is placed in areas where

(amber) turns oꢀ and the ignition

switches to the ON position.

After pressing the push button

it is diꢁcult for the system to

detect the signal (page 3-7).

A key from another



start and before the engine starts,

the operation sound of the fuel

pump motor from near the fuel

tank can be heard, however, this

does not indicate a malfunction.

8. After starting the engine, let it idle

for about 10 seconds.

manufacturer similar to the key

is in the operational range.

(Forced engine starting method)



If the KEY warning indication

(red) is displayed, or the push

button start indicator light

(amber) ﬂashes, this could

indicate that the engine may not

start using the usual starting

method (page 7-34). Have your

vehicle inspected at an

Authorized Mazda Dealer as

soon as possible. If this occurs,

the engine can be force-started.

Press and hold the push button

start until the engine starts. Other

procedures necessary for starting

the engine, such as having the key

in the cabin, and depressing the

clutch pedal (manual

NOTE



Do not use high engine speeds

until reaching the operating

temperature.



Whether the engine is cold or

warm, it should be started

without the use of the

accelerator.



If the engine does not start the

ﬁrst time, refer to Starting a

Flooded Engine under Emergency

Starting. If the engine still does

not start, have your vehicle

inspected by an Authorized

Mazda Dealer (page 7-20).

transmission) or the brake pedal

(automatic transmission) are

required.

4-7

When Driving

Start/Stop Engine

If the engine cannot be started due to

a dead key battery, the engine can be

started using the following procedure:

1. Continue to depress the brake

pedal ﬁrmly until the engine has

completely started.

Engine Start Function When Key

Battery is Dead

▼

CAUTION

When starting the engine by holding

the transmitter over the push button

start due to a dead key battery or a

malfunctioning key, be careful not to

allow the following, otherwise the

signal from the key will not be received

correctly and the engine may not start.

2. (Manual transmission)

Continue to depress the clutch

pedal ﬁrmly until the engine has

completely started.

(Automatic transmission)

Put the vehicle in park (P). If you

must restart the engine while the

vehicle is moving, shift into neutral

(N).

Metal parts of other keys or metal

objects touch the key.

3. Make sure that the push button

start indication light (green) ﬂashes.

4. Align the center area of the

emblem on the transmitter with the

center area of the push button start

while the push button start

Spare keys or keys for other vehicles

equipped with an immobilizer

indicator light (green) ﬂashes.

system touch or come near the key.

Devices for electronic purchases, or

security passage touch or come near

the key.

1. Indicator light

2. Push button start

3. Transmitter

4. Emblem

5. Make sure that the push button

start indicator light (green) turns

on.

6. Press the push button start to start

the engine.

4-8

When Driving

Start/Stop Engine

NOTE

Emergency Operation for Starting

the Engine

▼



The engine cannot be started

unless the clutch pedal is fully

depressed (manual transmission)

or the brake pedal is fully

depressed (automatic

If the KEY warning indication (red) is

displayed, or the push button start

indicator light (amber) ﬂashes, this

could indicate that the engine may not

start using the usual starting method.

Have your vehicle inspected at an

Authorized Mazda Dealer as soon as

possible. If this occurs, the engine can

be force-started. Press and hold the

push button start until the engine

starts. Other procedures necessary for

starting the engine such as having the

key in the cabin, and depressing the

clutch pedal (manual transmission) or

the brake pedal (automatic

transmission).



If there is a malfunction with the

push button start function, the

push button start indicator light

(amber) ﬂashes. In this case, the

engine may start, however, have

the vehicle checked at an

Authorized Mazda Dealer as

soon as possible.

If the push button start indicator

light (green) does not illuminate,

perform the operation from the

beginning again. If it does not

illuminate, have the vehicle

checked at an Authorized Mazda

Dealer.



transmission) are required.



To switch the ignition position

without starting the engine,

perform the following operations

after the push button start

indicator light (green) turns on.

1. Release the clutch pedal

(manual transmission) or

brake pedal (automatic

transmission).

2. Press the push button start to

switch the ignition position.

The ignition switches in the

order of ACC, ON, and oꢀ

each time the push button

start is pressed. To switch the

ignition position again,

perform the operation from

the beginning.

4-9

When Driving

Start/Stop Engine

NOTE

Turning the Engine Oꢀ



The cooling fan in the engine

Turning the Engine Oꢀ

▼

compartment could turn on for a few

minutes after the ignition is switched

from ON to OFF, whether or not the

A/C is on or oꢀ, to cool the engine

compartment quickly.

If the system detects that the

remaining battery power of the key is

low when the ignition is switched

from ON to ACC or OFF, the

following is indicated.

Replace with a new battery before

the key becomes unusable.

Refer to Key Battery Replacement on

page 6-30.

A message is indicated in the display

of the instrument cluster.

Refer to KEY Warning Indication/

Warning Light (Red) on page 7-34.

(Automatic transmission)

WARNING

Do not stop the engine while the

vehicle is moving:



Stopping the engine while the vehicle

is moving for any reason other than in

an emergency is dangerous. Stopping

the engine while the vehicle is moving

will result in reduced braking ability

due to the loss of power braking,

which could cause an accident and

serious injury.

1. Stop the vehicle completely.

2. (Manual transmission)

Shift into neutral and set the

parking brake.



(Automatic transmission)

Shift the selector lever to the P

position and set the parking brake.

3. Press the push button start to turn

oꢀ the engine. The ignition position

is oꢀ.

If the engine is turned oꢀ while the

selector lever is in a position other

than P, the ignition switches to ACC.

Emergency Engine Stop

▼

Continuously pressing the push button

start or quickly pressing it any number

of times while the engine is running or

the vehicle is being driven will turn the

engine oꢀ immediately. The ignition

switches to ACC.

CAUTION

When leaving the vehicle, make sure

the push button start is oꢀ.

4-10

When Driving

Start/Stop Engine

(AUTOHOLD operation turned oꢀ and

When not using Mazda Radar Cruise

Control with Stop & Go function

(MRCC with Stop & Go function)/

Traꢁc Jam Assist (TJA))

1. Engine idling stops when the brake

pedal is depressed while the vehicle

is driven (except for driving in the R

or M position second gear ﬁxed

mode) and the vehicle is stopped.

2. The engine restarts automatically

when the brake pedal is released

with the selector lever in the D or

M position (not in second gear

ﬁxed mode).

3. If the selector lever is in the N or P

position, the engine does not

restart when the brake pedal is

released. The engine restarts when

the brake pedal is depressed again

or the selector lever is shifted to the

D, M (not in second gear ﬁxed

mode) or the R position. (For the

purposes of safety, always keep the

brake pedal depressed when

i-stop^*

i-stop

▼

The i-stop function automatically stops

the engine when the vehicle is stopped

at a traꢁc light or stuck in traꢁc, and

then restarts the engine automatically

to resume driving. The system provides

improved fuel economy, reduced

exhaust gas emissions, and eliminates

idling noise while the engine is

stopped.

Engine idle stopping and restarting

NOTE



After parking the vehicle, make sure

that the ignition is switched OFF.

There is the possibility of the vehicle

moving if the vehicle is parked while

i-stop is operating.

The i-stop indicator light (green)

turns on under the following

conditions:



shifting the selector lever while

engine idling is stopped.)



When engine idling is stopped.

(When the vehicle is stopped by the

MRCC with Stop & Go function/TJA

stop hold control)

1. When the vehicle is stopped by the

MRCC with Stop & Go function/

TJA, engine idling stops and

continues to be stopped without

depressing the brake pedal.

2. When the accelerator pedal is

depressed or the RES switch is

operated, while the vehicle is

stopped by the MRCC with Stop &

Go function/TJA, the engine will

automatically restart if the selector

lever is in the D/M position (not in

second gear ﬁxed mode).



The i-stop indicator light (green)

turns oꢀ when the engine is

restarted.

Engine idle stopping and restarting

while vehicle is stopped

4-11

*Some models.

When Driving

Start/Stop Engine

(When the vehicle is stopped by the

AUTOHOLD function)

headway control using the MRCC

with Stop & Go function/TJA.

1. When the brake pedal is depressed

while the vehicle is being driven

and the vehicle comes to a stop,

the i-stop function will operate and

continue to operate even if the

brake is released (except when

driving in the R or M position

second gear ﬁxed mode).

2. The engine restarts automatically

when the accelerator pedal is

depressed with the selector lever in

the D/M position (not in second

gear ﬁxed mode).

2. If it is necessary to accelerate while

in headway control using the MRCC

with Stop & Go function/TJA, the

engine restarts automatically.

Operation conditions

Under the following conditions, engine

idling stops and the i-stop indicator

light (green) turns on.



The engine is warmed up.

The engine has been started and the



vehicle is driven for a certain period.

The engine is started with the hood



3. If the selector lever is in the N or P

position, the engine does not

restart when the brake pedal is

released. The engine restarts when

the brake pedal is depressed again

or the selector lever is shifted to the

D, M (not in second gear ﬁxed

mode) or the R position. (For the

purposes of safety, always keep the

brake pedal depressed when

shifting the selector lever while

engine idling is stopped.)

closed.



All doors, liftgate/trunk lid, and

hood are closed.

The driver's seat belt is fastened.

The air conditioner is not operating



with the airﬂow mode in the

position.

The temperature setting dial of the

air conditioner is in a position other

than maximum heating or maximum

cooling (A/C ON) position.



(Automatic climate control system)

Engine idle stopping and restarting

while driving

The vehicle's interior temperature

and the set temperature for the air

conditioner are nearly the same.

(When not using MRCC with Stop &

Go function/TJA)



The i-stop warning light (amber) is

not turned on/ﬂashing.

The keyless entry & push button start

system functions are normal.

The temperature and charge

condition of the M Hybrid battery is

within normal operating range.

The Integrated Starter-Generator

(ISG) is in good condition.

(While vehicle is stopped)

1. Engine idling stops when the

vehicle speed is about 20 km/h (12

mph) or slower after depressing the

brake pedal while driving the

vehicle (in D position).

2. The engine restarts automatically

after releasing the brake pedal with

the selector lever in the D position.

(When using MRCC with Stop & Go

function/TJA)



The selector lever is in the D or M

1. Engine idling stops when the

vehicle has decelerated to about 20

km/h (12 mph) or slower while in

position (not in second gear ﬁxed

mode).

The automatic transmission ﬂuid



has warmed up suꢁciently.

4-12

When Driving

Start/Stop Engine



The automatic transmission ﬂuid

temperature is not abnormally

high.

The vehicle is not stopped

suddenly.

The steering wheel is almost in the

straight-ahead position (idling may

not stop even with the steering

wheel in the straight-ahead

position if force is applied to the

steering wheel. Release the force

applied to the steering wheel to

stop engine idling).

The vehicle is stopped by

depressing the brake pedal.

The vehicle is not on a steep slope.

The vehicle is not stopped

suddenly.

NOTE

Under the following conditions, a

period of time is required to stop

engine idling



The M Hybrid battery power is

depleted for some reason such as the

vehicle has not been driven for a

long period.

The ambient temperature is high or

low.

After the battery terminals are

disconnected for some reason such

as for battery replacement.



(While driving)

Engine-stop period is short or time

until next engine idle stop is long



The selector lever is in the D

position (not in second gear ﬁxed

mode).

The vehicle is driven at a speed of

20 km/h (12 mph) or faster after

engine idling stops.



The ambient temperature is high or



low.



The M Hybrid battery power is

depleted.

Power consumption by the vehicle's



The vehicle is driven at a vehicle

electrical parts is high.

speed of about 30 km/h (19 mph)

or faster after engine idling stops

while driving.

The vehicle is not driven in sport

mode.

Engine restarts automatically while

engine idling is stopped

Under the following conditions, the

engine restarts automatically.



The automatic transmission ﬂuid

has warmed up suꢁciently.



The i-stop OFF switch is pressed until



the beep sounds.

The air conditioner is operated with

The automatic transmission ﬂuid

temperature is not abnormally

high.



the airﬂow mode in the

position.

The temperature setting dial of the

air conditioner is in the maximum

heating or maximum cooling (A/C

ON) position.

The cabin temperature is largely

diꢀerent from the set temperature of

the air conditioner.

The brakes are released slightly on a

slope and the vehicle begins to

move.



The steering wheel is almost in the

straight-ahead position (idling may

not stop even with the steering

wheel in the straight-ahead

position if force is applied to the

steering wheel. Release the force

applied to the steering wheel to

stop engine idling).

The vehicle is stopped by

depressing the brake pedal.

The vehicle is not driven on a

slope.



4-13

When Driving

Start/Stop Engine



Two minutes have elapsed since the

idling was stopped.

The M Hybrid battery power is

depleted.

(Engine idling is stopped while the

vehicle is stopped)

If the selector lever is shifted from D or

M (not in second gear ﬁxed mode)

position to N or P position while

engine idling is stopped, the engine

does not restart even when the brake

pedal is released. The engine will

restart if the brake pedal is depressed

again or the selector lever is shifted to

the D, M (not in second gear ﬁxed

mode), or R position. (For the

purposes of safety, always keep the

brake pedal depressed when shifting

the selector lever.)

If the selector lever is shifted from the

D or M (not in second gear ﬁxed

mode) to the N or P position, and the

driver's seat belt is unfastened or the

driver's door is opened, the engine

restarts.



The accelerator pedal is depressed

with the selector lever in the D or

M (not in second gear ﬁxed mode)

position.



The selector lever is shifted to the R

position.

The selector lever is shifted from N



or P position to D or M (not in

second gear ﬁxed mode) position.

The steering wheel is operated



with the selector lever in the D or

M (not in second gear ﬁxed mode)

position.

Battery terminals have been

disconnected



The selector lever is in the M

position and the second gear ﬁxed

mode is selected.

The steering wheel is operated.

Engine idling may not stop right after

the battery terminals have been

disconnected. In addition, if the

battery is replaced, the i-stop functions

must be veriﬁed. Consult an



(Engine idling is stopped while

driving)



The selector lever is in a position

Authorized Mazda Dealer.

other than the D position.

The accelerator pedal is depressed.

Sport mode is selected.

The steering wheel is operated.

i-stop OFF Switch

▼



When pressing the switch, the i-stop

function stops and the i-stop OFF

switch indicator light turns on. If the

switch is pressed again, the i-stop

function becomes operational and the



With the selector lever in the P or

N position, or the D/M range, the

driver's seat belt is unfastened, the

driver's door is opened, or the

hood is opened.

Selector lever is operated while

engine idling is stopped

4-14

When Driving

Start/Stop Engine

i-stop OFF switch indicator light turns

oꢀ.

2. Vehicle brake force maintained

3. Engine restarted

1. Indicator light

NOTE

If the engine is stopped with the i-stop

function stopped, the i-stop function

becomes operational again when the

engine is started the next time.

4. Acceleration

Vehicle Roll Prevention Function

▼

Vehicles with the i-stop function are

equipped with a vehicle roll prevention

function. This function prevents the

vehicle from rolling, such as when

releasing the brake pedal while on a

slope under the following conditions:



While engine idling is stopped

(prevents the vehicle from rolling

back)

When the engine restarts after



releasing the brake pedal (prevents

the vehicle's sudden movement due

to vehicle creep), sudden movement

of the vehicle is prevented by

controlling the brakes.

1. Release foot from brake pedal

4-15

When Driving

Start/Stop Engine



The brake pedal response may

change, sound may occur from the

brakes, or the brake pedal could

vibrate from the operation of the

vehicle roll prevention function.

However, this does not indicate a

malfunction.

WARNING

Do not rely completely on the vehicle

roll prevention function.

The vehicle roll prevention function

is a supplementary function which

operates for a maximum of 2

seconds after releasing the brake

pedal and accelerating the vehicle

from an engine idling stop condition.

Over reliance on the system may

result in an unexpected accident if

the vehicle were to suddenly

accelerate. Before starting to drive

the vehicle, always conﬁrm the safety

of the surroundings and operate the

selector lever, brake pedal, and

accelerator pedal appropriately.

Note that the vehicle may move

suddenly depending on the vehicle's

load or if it is towing something.

Note that the vehicle may move

suddenly after the vehicle roll

i-stop Warning Light (Amber)/

i-stop Indicator Light (Green)

▼

To ensure safe and comfortable use of

the vehicle, the i-stop system

constantly monitors the driver's

operations, the vehicle's interior and

exterior environment, and the

operational status of the vehicle, and

uses the i-stop warning light (amber)

and i-stop indicator light (green) to

inform the driver of various cautions

and warnings.

NOTE

On vehicles equipped with the center

display, the i-stop operation status is

displayed in the fuel eꢁciency monitor

display.

Refer to the Fuel Eꢁciency Monitor

section in the Mazda Connect

Owner's Manual.

prevention function is released while

the vehicle is under the following

conditions:

The selector lever is in the N

position.

i-stop warning light (amber)

If the selector lever is shifted to the

N position and the brake pedal is

released while the i-stop function

is operating, the brake force is

gradually released. To accelerate

the vehicle, release the brake pedal

after the engine restarts and shift

the selector lever to a position

other than the N position.

The light turns on/ﬂashes continuously

if the system has a problem. Have the

vehicle inspected by an Authorized

Mazda Dealer.

NOTE

i-stop indicator light (green)



When the vehicle is stopped on a

steep grade, the vehicle roll

prevention function does not

operate because engine idling is not

stopped.

4-16

When Driving

Start/Stop Engine

When the light is turned on

Cylinder Deactivation^*

The light turns on while engine idling is

stopped and turns oꢀ when the engine

is restarted.

Cylinder Deactivation

▼

The cylinder deactivation is a function

designed to reduce fuel consumption

and improve fuel economy by

deactivating 2 out of the 4 cylinders

while driving. The function constantly

determines which is better for driving;

4 cylinders or 2 cylinders, regardless of

the driver's operations, and it performs

the switching automatically.

When the cylinder deactivation

function does not operate

The cylinder deactivation function

does not operate under the following

conditions.



(Manual Transmission)

The selector lever is in the N or R

position.

(Automatic Transmission)



The selector lever is in the P, N, or R

position.

The gear is in 1st gear.



The engine oil temperature or engine

coolant temperature is low.

After disconnecting the battery



terminals for some reason, such as

for battery replacement.

4-17

*Some models.

When Driving -> Start/Stop Engine for Your Mazda 3 4 Door Fourth Generation (2019-2026)

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