i-STOP (engine-stop control) permit condition

The conditions to stop the engine by the i-stop control are as follows:

DETERMINATION CONDITIONS

Determination module

Determination item

Determination condition

ATX

MTX

PCM

Vehicle speed If i-stop control is performed (engine stop control) while vehicle is stopped

0 km/h {0 mph}

3 km/h {1 mph} or less

Vehicle speed
If i-stop control is performed
(engine stop control) while driving

20 km/h {12 mph} or less

17 km/h {10.6 mph} or less

Brake pedal

Brake pedal is depressed while in D or M position However, no brake pedal conditions during Mazda Radar Cruise Control with Stop & Go function (MRCC with Stop & Go function) and Cruising & Traffic Support (CTS) operation ⁽¹⁾

Not applicable

PCM

Brake fluid pressure

Brake fluid pressure is 1.35 MPa {13.8 kgf/cm ² , 196 psi} or more while in D or M position (perform correction according to vehicle inclination angle) However, no brake fluid pressure conditions during Mazda Radar Cruise Control with Stop & Go function (MRCC with Stop & Go function) and Cruising & Traffic Support (CTS) operation ⁽¹⁾

Not applicable

Brake stroke

3 mm {0.1 in} or more

Not applicable

Panic brake

Not operating

←

ABS control

Not operating

←

Accelerator pedal

Released

←

Clutch pedal

Not applicable

Released

MTX gear position

Not applicable

Neutral

Vehicle conditions

Vehicle is stopped in D position ⁽²⁾

Not applicable

Steering speed

15 deg/s or less

←

Steering angle

Within 65° of center to left and right

Not applicable

If i-stop control is performed (engine stop control) while vehicle is stopped

(After EPS control module learns center value)

Steering angle If i-stop control is performed (engine stop control) while driving

Within 20° of center to left and right
(After EPS control module learns center value)

←

Steering torque

1.1 N.m {11 kgf.cm, 9.7 in.lbf} or less

←

i-stop OFF switch

OFF

Not applicable

Vehicle speed history (After engine started and driven once)
If i-stop control is performed (engine stop control) while driving

Driving at a speed of 13 km/h {8.1 mph} or more
During i-stop while driving (engine stop control): Driving at a speed of 30 km/h {19 mph} or more

Driving at a speed of 11 km/h {6.8 mph} or more

Vehicle speed history (After engine started and driven once)
If i-stop control is performed (engine stop control) while vehicle is stopped

3 km/h {2 mph}

4 km/h {3 mph}

Battery charge condition ⁽⁴⁾

65.72 % or more

←

Battery fluid temperature ⁽⁴⁾

0-70°C {32-158°F}

←

Battery voltage ⁽⁴⁾

11.2 V or more

←

Power brake unit vacuum ⁽⁴⁾

-49.8 kPa {-0.508 kgf/cm ² , -7.22 psi} or less (value calculated by subtracting BARO from BBP)

←

Door (driver's side)

Closed

←

Hood

Closed

←

Vehicle inclination angle If i-stop control is performed (engine stop control) while vehicle is stopped

Within ±7° when level

Not applicable

Vehicle inclination angle If i-stop control is performed (engine stop control) while driving

Within ±1.1° when level

←

Seat belt (driver's side)

Fastened ⁽³⁾

←

PCM

Steering angle sensor initial setting

Completed

←

Battery condition setting ⁽⁴⁾

Completed

Engine coolant temperature

36-110°C {97-230°F}

←

Intake air temperature

100°C {212°F} or less

←

Altitude

2, 000 m {6561 ft} or less

←

System condition

i-stop related part DTCs are not recorded

←

Mazda M Hybrid battery voltage ⁽⁵⁾

20 V or more

←

Mazda M Hybrid battery condition ⁽⁵⁾

30 % or more

←

Mazda M Hybrid battery temperature ⁽⁵⁾

59°C {138°F} or less

←

ISG MOSFET temperature ⁽⁵⁾

100°C {212°F} or less

←

ISG monitoring board temperature ⁽⁵⁾

100°C {212°F} or less

←

Brake coordinated control end ⁽⁵⁾

Completed

Not applicable

Request deceleration speed

When any of the following conditions is met

MRCC is operating
MRCC is not operating

Not applicable

Cylinder deactivation control

Vehicle is not being driven with 2 cylinders

←

Drive selection switch

Other than SPORT mode

Not applicable

BCM

+B (ROOM fuse) input

Yes

←

IG1 input

Yes

←

ACC input

Yes

←

IG1 output

Yes

←

ACC output

Yes

←

Push button

Not pressed

←

Door (all)

Closed

←

Liftgate

Closed

←

Seat belt (driver's side)

Fastened ⁽³⁾

←

Engine start

Engine was started by operating push button with key inside cabin (engine started first time)

←

Engine rotation speed

300 RPM or more is maintained after engine started

←

System condition

i-stop related part DTCs are not recorded

←

TCM

TCM detection condition

All met (I-Stop_EST: On)

Not applicable

Panic stop

Brake pedal was not depressed suddenly within 4 s

Not applicable

TFT

20-117°C {68-242°F}

Not applicable

Gear position

Not in 2nd gear fixed mode

Not applicable

System condition

i-stop related part DTCs are not recorded

Not applicable

Dash-electrical supply unit

Climate control unit determination condition

With full-auto A/C

All met (STOP_ST: Available)

With manual A/C

All met

←

Cabin temperature (with full-auto A/C)

Difference between target cabin temperature and actual cabin temperature is a certain value or less (Cabin temperature control by A/C is normally performed)

←

A/C temperature (with full-auto A/C)

Setting other than MAX/MIN

←

Ambient temperature

-10-50°C {14-122°F}

←

Cold condition (with manual A/C)

Ambient temperature is 29°C {84°F} or less and evaporator temperature is 9°C {48°F} or less

←

Cold condition (with full-auto A/C)

Ambient temperature is 4°C {39°F} or more or evaporator temperature is 12°C {54°F} or less

←

Warm-up operation condition (with manual A/C)

Ambient temperature is 10°C {50°F} or more and engine coolant temperature is 60°C {140°F} or more

←

Dash-electrical supply unit

Front defroster switch

OFF

←

System condition

i-stop related part DTCs are not recorded

←

DSC HU/Control Module ⁽⁴⁾ Electronically controlled brake unit ⁽⁵⁾

Operation request from PCM

Hill Launch Assist (HLA) control request signal from PCM is received

Not applicable

Vehicle inclination angle

Inclination is within ±6° with shift positioned in D/M/R or N/P (LON_ACCL_C: within ±0.104 G)

Not applicable

Wheel speed (4 wheels)

0 km/h {0 mph}

Not applicable

Brake pedal

Brake pedal is depressed

Not applicable

Brake fluid pressure

Approx. 0.45 MPa {4.6 kgf/cm2, 65 psi} or more

Not applicable

Accelerator pedal

Released

Not applicable

System condition

i-stop related part DTCs are not recorded

Not applicable

⁽¹⁾	During Mazda Radar Cruise Control with Stop & Go function (MRCC with Stop & Go function) and Cruising & Traffic Support (CTS) operation, the engine is stopped by i-stop control without having to depress the brake pedal.

⁽²⁾	After the vehicle is stopped, the engine stops if the gear is shifted to N position. In addition, if the gear is shifted to P position after the vehicle is stopped in D position, the engine stop condition by the i-stop control is maintained.

⁽³⁾	If the seat belt is unfastened while the vehicle is stopped, i-stop is inhibited until a vehicle speed record is input once.

⁽⁴⁾	without Mazda M Hybrid

⁽⁵⁾	with Mazda M Hybrid