Start/Stop Engine

The i-stop function automatically stops the engine when the vehicle is stopped at a traffic light or stuck in traffic, 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

 

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• The i-stop indicator light (green) turns on under the following conditions:

  • When engine idling is stopped.

  • (Except European model)

    Engine idling stop conditions are met while the vehicle is being driven.

  

• The i-stop indicator light (green) turns off when the engine is restarted.

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Manual transaxle

1. Stop the vehicle by depressing the brake pedal and then the clutch pedal.

2. While depressing the clutch pedal, shift the shift lever to the neutral position. Engine idling stops after the clutch pedal is released.

3. (SKYACTIV-G 1.3, SKYACTIV-G 1.5)

   The engine restarts automatically when you depress the clutch pedal or start to release it.

    

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   The engine restart timing varies depending on the brake pedal depression force.

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   (SKYACTIV-D 1.5)

   The engine restarts automatically when the clutch pedal is depressed.

Automatic transaxle

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 shifting the selector lever while engine idling is stopped.)

Operation conditions

When the system is operable

Under the following conditions, engine idling stops and the i-stop indicator light (green) turns on.

• (SKYACTIV-G 1.3, SKYACTIV-G 1.5)

  The engine is warmed up.

• (SKYACTIV-D 1.5)

  • The engine is not cold.

  • The fuel injection amount learning, which is performed periodically and automatically, is not being performed.

• The engine has been started and the vehicle is driven for a certain period.

• The engine is started with the bonnet closed.

• The battery is in good condition.

• All doors, liftgate/boot lid, and bonnet are closed.

• The driver's seat belt is fastened.

• The air conditioner is not operating with the airflow mode dial in the position.

• (Automatic air-conditioning)

  • The temperature setting dial for the air-conditioning is set to a position other than maximum heating/maximum cooling (A/C ON).

  • The vehicle's interior temperature and the set temperature for the air conditioner are nearly the same.

• The i-stop warning light (amber) is not turned on/flashing.

• The keyless entry & push button start system functions are normal.

• The brake vacuum is sufficiently high.

• The steering wheel is not being operated.

• (Manual transaxle)

  • The vehicle speed is 3 km/h (1.8 mph) or less.

  • The shift lever is in the neutral position.

  • The clutch pedal is not depressed.

• (Automatic transaxle)

  • The vehicle is stopped.

  • The selector lever is in the D or M position (not in second gear fixed mode).

  • The automatic transaxle fluid has warmed up sufficiently.

  • The automatic transaxle fluid temperature is not abnormally high.

  • 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.

  • Emergency braking is not applied.

When the system is not operable

Engine idling does not stop in the following conditions:

• The vehicle is stopped but the engine is kept idling.

• The air conditioner is operating with the airflow mode dial in the position.

• (Automatic air-conditioning)

  • The temperature setting dial for the air-conditioning is set to the maximum heating/maximum cooling (A/C ON) position.

  • There is a large difference between the cabin temperature and the set temperature of the air conditioner.

• The ambient temperature is extremely high or low.

• The atmospheric pressure is low (when driving at high altitudes).

• (Automatic transaxle)

  • The vehicle is stopped on a steep incline.

  • The steering wheel is not in the straight-ahead position while the vehicle is stopped.

• (SKYACTIV-D 1.5)

  • The particulate matter (PM) is being removed by the diesel particulate filter (DPF).

  • The fuel injection amount learning is being performed. (The i-stop indicator light (green) turns off when the vehicle speed before stopping is approx. 10 km/h (6.2 mph) or less and fuel injection amount learning is performed while the vehicle is stopped.)

 

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Under the following conditions, a period of time is required to stop engine idling

• The battery power is depleted for some reasons 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 reasons such as for battery replacement.

• (SKYACTIV-D 1.5)

  After PM removal is performed by the diesel particulate filter (DPF).

Engine does not restart

If the following operations are performed while the idling is stopped, the engine will not restart for safety reasons. In such cases, start the engine using the normal method.

• The bonnet is opened.

• (European model)

  The driver's seat belt is unfastened and the driver's door is opened.

• (Except European model)

  • (Manual transaxle)

    With the shift lever in a position other than neutral, the driver's seat belt is unfastened and the driver's door is opened.

  • (Automatic transaxle)

    With the selector lever in the D or M (not in second gear fixed mode), the driver's seat belt is unfastened and the driver's door is opened.

Engine-stop period is short or time until next engine idle stop is long

• The ambient temperature is high or low.

• The battery power is depleted.

• Power consumption by the vehicle's electrical parts is high.

Engine restarts automatically while engine idling is stopped

Under the following conditions, the engine restarts automatically.

• The i-stop OFF switch is pressed until the beep sounds.

• The air conditioner is operated with the airflow mode dial in the position.

• (Automatic air-conditioning)

  • The temperature setting dial of the air conditioner is set to the maximum heating/maximum cooling (A/C ON).

  • The cabin temperature is largely different from the set temperature of the air conditioner.

• The brakes are released slightly on a slope and the vehicle begins to move.

• Two minutes have elapsed since the idling was stopped.

• The battery power is depleted.

• (Automatic transaxle)

  • 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.

  • The selector lever is in the M position and the second gear fixed mode is selected.

• (Except European model)

  • (Manual transaxle)

    With the shift lever in the neutral position, the driver's seat belt is unfastened and the driver's door is opened.

  • (Automatic transaxle)

    With the selector lever in the N or P position, the driver's seat belt is unfastened and the driver's door is opened.

Selector lever is operated while engine idling is stopped (automatic transaxle)

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 while engine idling is stopped.)

• (European model)

  If the selector lever is shifted from the D or M (not in second gear fixed mode) position to the N or P position, and the driver's seat belt is unfastened and the driver's door is opened, the engine does not restart. Start the engine using the normal method.

• (Except European model)

  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 and the driver's door is opened, the engine restarts.

Battery terminals are disconnected

Engine idling may not stop right after the battery terminals are disconnected. In addition, if the battery is replaced, the i-stop functions must be verified. Consult an expert repairer, we recommend an Authorised Mazda Repairer.

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