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i-ACTIVSENSE
Mazda Radar Cruise Control (MRCC) (Some Models)
The Mazda Radar Cruise Control (MRCC) system is designed to maintain headway control*1 according to the vehicle speed using a radar sensor (front) to detect the distance to a vehicle ahead, and by presetting the vehicle speed between 30 km/h (19 mph) and 145 km/h (90 mph), the driver is freed from having to constantly use the accelerator or brake pedals.
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Headway Control: Control of the distance between your vehicle and the vehicle ahead detected by the Mazda Radar Cruise Control (MRCC) system.
Additionally, if your vehicle starts closing in on the vehicle ahead because, for example, the vehicle ahead brakes suddenly, a warning sound and a warning indication in the display are activated simultaneously to alert you to maintain a sufficient distance between the vehicles.
Use the Mazda Radar Cruise Control (MRCC) system on expressways and other highways which do not require a lot of repeated acceleration and deceleration.
Do not rely completely on the Mazda Radar Cruise Control (MRCC) system and always drive carefully:
The Mazda Radar Cruise Control (MRCC) system is designed to reduce load on the driver, and although it maintains a constant vehicle speed, or specifically, it maintains a constant distance between your vehicle and the detected vehicle ahead according to the vehicle speed, the system has detection limitations depending on the type of vehicle ahead and its conditions, the weather conditions, and the road conditions. Additionally, the system may be unable to decelerate sufficiently to avoid hitting the vehicle ahead if the vehicle ahead applies the brakes suddenly or another vehicle cuts into the driving lane, which could result in an accident. Always verify the safety of the surrounding area and depress the brake pedal or accelerator pedal while keeping a safer distance from vehicles ahead or on-coming vehicles.
Do not use the Mazda Radar Cruise Control (MRCC) system in the following locations. Otherwise, it could lead to an accident:
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Roads with sharp curves and where vehicle traffic is heavy and there is insufficient space between vehicles. Roads where frequent and repetitive acceleration and deceleration occur (Driving under these conditions using the Mazda Radar Cruise Control (MRCC) system is not possible).
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When entering and exiting interchanges, service areas, and parking areas of highways (If you exit a highway while headway control is in use, the vehicle ahead will no longer be tracked and your vehicle may accelerate to the set speed).
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Slippery roads such as ice or snow-bound roads (The tires could spin causing you to lose vehicle control).
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Long descending slopes (to maintain distance between vehicles, the system automatically and continuously applies the brakes which could result in the loss of brake power).
For the purposes of safety, switch the Mazda Radar Cruise Control (MRCC) system off when it is not being used.
If the vehicle is towed or you are towing something, switch the Mazda Radar Cruise Control (MRCC) system off to prevent an incorrect operation.
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The Mazda Radar Cruise Control (MRCC) system operates when all of the following conditions are met.
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The vehicle speed is about 30 km/h (19 mph) to 145 km/h (90 mph).
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The Mazda Radar Cruise Control (MRCC) system is turned on.
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The parking brake is not applied.
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The Smart Brake Support (SBS) is not malfunctioning.
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The Dynamic Stability Control (DSC) is operating normally.
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The selector lever is in the drive (D) position or manual (M) position (manual mode).
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In the following cases, the warnings may not activate even if your vehicle starts closing in on the vehicle ahead.
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You are driving at the same speed as the vehicle ahead.
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Directly after the Mazda Radar Cruise Control (MRCC) system has been set.
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When the accelerator pedal is depressed or directly after the accelerator pedal is released.
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Another vehicle cuts into the driving lane.
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The following are not detected as physical objects.
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Vehicles approaching in the opposite direction
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Pedestrians
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Stationary objects (stopped vehicles, obstructions)
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If a vehicle ahead is traveling at an extremely low speed, the system may not detect it correctly.
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During headway control travel, do not set the system on two-wheeled vehicles such as motorcycles and bicycles.
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Do not use the Mazda Radar Cruise Control (MRCC) system under conditions in which the close proximity warnings are frequently activated.
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During headway control travel, the system accelerates and decelerates your vehicle in conjunction with the speed of the vehicle ahead. However, if it is necessary to accelerate for a lane change or if the vehicle ahead brakes suddenly causing you to close in on the vehicle rapidly, accelerate using the accelerator pedal or decelerate using the brake pedal depending on the conditions.
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While the Mazda Radar Cruise Control (MRCC) system is in use, it does not cancel even if the selector lever is operated and any intended engine braking will not occur. If deceleration is required, lower the vehicle speed setting or depress the brake pedal.
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The brake lights are illuminated while the Mazda Radar Cruise Control (MRCC) automatic braking is operating.
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The Mazda Radar Cruise Control (MRCC) warning light (amber) turns on when the system has a malfunction.
Refer to Warning/Indicator Lights (Search). -
The headway control operation can be canceled and the system can be switched to only cruise control.
Refer to Cruise Control Function (Search).
Mazda Radar Cruise Control (MRCC) Display Indication
The setting status and operation conditions of the Mazda Radar Cruise Control (MRCC) system are indicated in the multi-information display.
Close Proximity Warning
If your vehicle rapidly closes in on the vehicle ahead because the vehicle applies the brakes suddenly while you are traveling in headway control, the warning sound activates and the brake warning is indicated in the display. Always verify the safety of the surrounding area and depress the brake pedal while keeping a safer distance from the vehicle ahead. Additionally, always keep a safer distance from the vehicles behind you.
Setting the System
When the ON switch is pressed, the vehicle speed and the distance between vehicles while in headway control can be set. The Mazda Radar Cruise Control (MRCC) indication is shown in the display of the instrument cluster.
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When the ignition is switched to ACC or OFF while the Mazda Radar Cruise Control (MRCC) is ON, the Mazda Radar Cruise Control (MRCC) remains ON automatically.
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When the ON switch is pressed continuously for about 2 seconds while the Mazda Radar Cruise Control (MRCC) system is turned on, the system switches the function to only cruise control.
How to Set the Speed
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Adjust the vehicle speed to the desired setting using the accelerator pedal.
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Headway control begins when the SET
or SET
switch is pressed. The set speed and the inter-vehicle distance display filled with white lines are displayed. The Mazda Radar Cruise Control (MRCC) indicator light (green) is indicated simultaneously.
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Travel status |
Display |
|---|---|
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During travel at constant speed |
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During travel under headway control |
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If a vehicle ahead is detected while traveling at a constant speed, the vehicle-ahead indication is displayed and headway control is performed. Additionally, when a vehicle ahead is no longer detected, the vehicle-ahead indication turns off and the system switches back to travel at constant speed.
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Headway control is not possible if the vehicle ahead is driving faster than the set speed. Adjust the system to the desired vehicle speed using the accelerator pedal.
How to Set the Distance Between Vehicles During Headway Control
The distance between vehicles is set to a shorter distance each time the 
switch is pressed. The distance between vehicles is set to a longer distance by pressing the 
switch. The distance-between-vehicles can be set to 4 levels; Long, medium, short, and extremely short distance.
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Distance-between-vehicles guideline (at 80 km/h (50 mph) vehicle speed) |
Indication on display |
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Long (about 50 m (164 ft)) |
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Medium (about 40 m (131 ft)) |
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Short (about 30 m (98 ft)) |
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Extremely short (about 25 m (82 ft)) |
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The distance between vehicles differs depending on the vehicle speed, and the slower the vehicle speed, the shorter the distance.
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When the ignition is switched to ACC or OFF and then the engine is started again, the system automatically sets the distance between vehicles to the previous setting.
Changing the Set Vehicle Speed
Changing the set vehicle speed using the SET switch
Press the SET switch to accelerate.
Press the SET switch to decelerate.
The set vehicle speed changes as follows each time the SET switch is pressed.
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Short press |
1 km/h (1 mph) |
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Long press |
10 km/h (5 mph) |
For example, the set vehicle speed is changed by pressing the SET switch four times as follows:
The vehicle speed accelerates or decelerates by 4 km/h (4 mph).
To accelerate using the accelerator pedal
Depress the accelerator pedal and press and release the SET or SET switch at the desired speed. If a switch cannot be operated, the system returns to the set speed when you release your foot from the accelerator pedal.
The warnings and brake control do not operate while the accelerator pedal is depressed.
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When accelerating using the SET
switch while in headway control, the set vehicle speed can be adjusted but acceleration is not possible. If there is no longer a vehicle ahead, acceleration continues until reaching the set vehicle speed. Check the set vehicle speed by viewing the set vehicle speed display in the display in the instrument cluster. -
When depressing the accelerator pedal, the inter-vehicle distance display in the display in the instrument cluster changes to the white-line display.
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The minimum settable speed is 30 km/h (19 mph). If the set vehicle speed reaches 30 km/h (19 mph) using the switch operation, constant speed travel is maintained at about 30 km/h (19 mph) even if the SET
switch is pressed. The Mazda Radar Cruise Control (MRCC) system is not canceled.
To Deactivate
The Mazda Radar Cruise Control (MRCC) is canceled when the OFF switch is pressed.
When the system is temporarily canceled
In the following cases, the Mazda Radar Cruise Control (MRCC) system is temporarily canceled and the “MRCC Cancelled” indication is displayed in the display in the instrument cluster. The Mazda Radar Cruise Control (MRCC) indicator light (green) turns off simultaneously.
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The CANCEL switch is pressed.
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The brake pedal is depressed.
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The parking brake is applied.
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The selector lever is shifted to park (P), neutral (N) or reverse (R).
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In the following cases, the “MRCC Cancelled” indication is displayed and the beep sounds one time.
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The vehicle speed decreases to less than 25 km (16 mph).
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The DSC has operated.
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The TCS has operated for a certain period of time.
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The Smart City Brake Support (SCBS) has operated.
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The Smart Brake Support (SBS) has operated.
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When traveling on a down slope for a long period of time.
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There is a problem with the system.
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The Mazda Radar Cruise Control (MRCC) system may be canceled during rain, fog, snow or other inclement weather conditions, or the front surface of the radiator grille is dirty.
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If you have temporarily canceled the Mazda Radar Cruise Control (MRCC), you can return to your previously set speed by pressing the RES switch and after all of the operation conditions have been met.
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If the OFF switch is pressed to cancel the Mazda Radar Cruise Control (MRCC), the system does not return to the previously set speed even if the RES switch is pressed.
Cruise Control Function
While this function is operating, the headway control operation is canceled and only the cruise control function operates.
The vehicle speed can be set more than about 25 km/h (16 mph).
Use the cruise control function on expressways and other highways which do not require a lot of repeated acceleration and deceleration.
Do not use the cruise control function in the following locations:
Otherwise, it could lead to an accident.
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Roads with sharp curves and where vehicle traffic is heavy and there is insufficient space between vehicles. (Driving under these conditions using the cruise control function is not possible)
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Steep down slopes (Set speed may be exceeded because sufficient engine braking cannot be applied)
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Slippery roads such as ice or snow-bound roads (Tires could spin causing you to lose vehicle control)
Always drive carefully:
The warnings and brake control will not operate after the headway control function is canceled and the system is switched to only the cruise control function. Depress the brake pedal to decelerate according to the surrounding conditions while keeping a safer distance from the vehicle ahead and always driving carefully.
Switching to cruise control function
When the ON switch is pressed continuously for about 2 seconds while the Mazda Radar Cruise Control (MRCC) system is turned on, the system is switched to the cruise control function.
The Mazda Radar Cruise Control (MRCC) indicator light (green) in the instrument cluster turns off and a message is displayed in the multi-information display at the same time.
Always turn off the cruise control function when it is not in use:
Leaving the cruise control function turned on when it is not in use is dangerous as it could operate unexpectedly, resulting in an accident.
How to set the speed
Adjust the system to the desired vehicle speed using the accelerator pedal.
Cruise control function begins when the SET
or SET
switch is pressed.
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The system may not be able to maintain the set speed constantly depending on driving conditions such as steep up or down slopes.
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The speed will continue increasing while the SET
switch is pressed and held. The speed will continue decreasing while the SET switch is pressed and held.
How to increase the set speed
The set speed can be increased using the following operations:
To increase speed using the SET switch
Press and hold the SET switch and release the switch at the desired speed.
The set speed can be adjusted incrementally (1 km/h (1 mph) increments) by pressing the switch and releasing it immediately. For example, if the switch is pressed 4 times, the set speed increases by about 4 km/h (4 mph).
To increase speed using accelerator pedal
Depress the accelerator pedal and press the SET or SET switch at the desired speed.
If the switch is not operated, the system returns to the set speed after you release your foot from the accelerator pedal.
How to Decrease the Set Speed
Press the SET switch continuously and release the switch at the desired speed.
The set speed can be adjusted incrementally (1 km/h (1 mph) increments) by pressing the switch and releasing it immediately. For example, if the switch is pressed 4 times, the set vehicle speed decreases by about 4 km/h (4 mph).
Cancelling the function
Cancelling using OFF switch
When the OFF switch is pressed, the cruise control function is cancelled.
Cancelling using ON switch
When the ON switch is pressed continuously for about 2 seconds, the cruise control function is canceled and the headway control function is made available for operation.
The cruise control function is canceled automatically in the following cases. If the RESUME switch is pressed while the vehicle speed is 25 km/h (16 mph) or higher, the speed returns to the original set speed.
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The CANCEL switch is pressed.
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The brake pedal is depressed.
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The parking brake is applied.
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The selector lever is shifted to P or N position.
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If the vehicle speed decreases by about 15 km/h (9.4 mph) or more than the set speed, the cruise control function may be canceled.
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When the vehicle speed is less than 21 km/h (13 mph), the cruise control function is canceled. In this case, the vehicle speed will not return to the original set speed even if the vehicle is accelerated to 25 km/h (16 mph) or higher and the RES switch is pressed. Reset the cruise control function.
