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

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 2.0, SKYACTIV-G 2.5)

  The engine is warmed up.

• (SKYACTIV-D 2.2)

  • 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 in .

• (Automatic air-conditioning)

  • The temperature setting dial for the air conditioning is set to a position other than 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.

• 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 in .

• (Automatic air-conditioning)

  • The temperature setting dial for the air conditioning is set to the 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).

• 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 2.2)

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

 

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 in .

• (Automatic air-conditioning)

  • The temperature setting dial of the air-conditioner is set to 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.

• 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.

• 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

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.)

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.