Engine stop control

i-stop (engine-stop control) permit condition

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

Determination module

Determination item

Determination condition

PCM

Vehicle speed

0 km/h {0 mph}

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 Traffic Jam Assist (TJA) operation ⁽¹⁾

Brake fluid pressure

Brake fluid pressure is 1.35 MPa {13.8 kgf/cm² , 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 Traffic Jam Assist (TJA) operation ⁽¹⁾

Brake stroke

3 mm {0.1 in} or more

Panic brake

Not operating

ABS control

Not operating

Accelerator pedal

Released

Vehicle conditions

Vehicle is stopped in D position ⁽²⁾

Steering speed

15 deg/s or less

Steering angle

Within 65° 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

Vehicle speed history (After engine started and driven once)

3 km/h {2 mph} or more

Battery charge condition

65.72 % or more

Battery fluid temperature

0-70°C {32-158°F}

Battery voltage

11.2 V or more

Power brake unit vacuum

-49.8 kPa {-0.508 kgf/cm² , -7.2 psi} or less

Door (driver's side)

Closed ⁽⁵⁾

Hood

Closed ⁽³⁾

Vehicle inclination angle

Within ±7° when level (LON_ACCL_C: within ±0.121 G)
Slipping drive wheel is detected:

-10-6°

Seat belt (driver's side)

Fastened ⁽⁴⁾

Battery condition initial setting (i-stop setting)

Completed

Steering angle sensor initial setting

Completed

Engine coolant temperature

55-110°C {131-230°F}

Intake air temperature

100°C {212°F} or less

Altitude

3, 000 m {9, 842 ft 6 in} or less

System condition

i-stop related part DTCs are not recorded

Mazda intelligent Drive Select (Mi-Drive) switch

Other than towing mode

BCM

+B (ROOM fuse) input

Yes

IG1 input

Yes

IG1 output

Yes

ACC output

Yes

Push button

Not pressed

Door (all)

Closed

Liftgate

Closed

Seat belt (driver's side)

Fastened ⁽⁴⁾

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)

Panic stop

Brake pedal was not depressed suddenly within 4 s

TFT

20-117°C {68-242°F}

Gear position

Not in 2nd gear fixed mode

System condition

i-stop related part DTCs are not recorded

Dash-electrical supply unit

Dash-electrical supply unit determination condition

All met (STOP_ST: Available)

Cabin temperature

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

Setting other than MAX/MIN

Ambient temperature

-10-50°C {14-122°F}

Cold condition

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

Front defroster switch

OFF

DSC HU/Control Module

Operation request from PCM

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

Vehicle inclination angle

Within ±7° when level (LON_ACCL_C: within ±0.121 G)
Slipping drive wheel is detected:

-10-6°

Wheel speed (4 wheels)

0 km/h {0 mph}

Brake pedal

Brake pedal is depressed

Brake fluid pressure

1.35 MPa {13.8 kgf/cm² , 196 psi} or more

Accelerator pedal

Released

System condition

i-stop related part DTCs are not recorded

⁽¹⁾	During Mazda Radar Cruise Control with Stop & Go function (MRCC with Stop & Go function) and Traffic Jam Assist (TJA) 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 engine is started with the hood open, i-stop is inhibited until the engine is stopped.

⁽⁴⁾	If the seat belt is unfastened while the vehicle is stopped, i-stop is inhibited until a vehicle speed record is input once.

⁽⁵⁾	If a door is opened while the vehicle is stopped, i-stop is inhibited until a vehicle speed record is input once.