Mazda Radar Cruise Control (MRCC)

The MRCC system is designed to maintain headway control*1 with a vehicle ahead according to your vehicle's speed using a front radar sensor to detect the distance to the vehicle ahead and a preset vehicle speed without you having to use the accelerator or brake pedals.

  1. Headway Control: Control of the distance between your vehicle and the vehicle ahead detected by the MRCC system.

Additionally, if your vehicle starts closing in on the vehicle ahead such as if 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.

Also refer to the following before using the MRCC.

 

Do not rely completely on the MRCC:

The MRCC 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 drive carefully and verify the surrounding conditions and depress the brake pedal or accelerator pedal while keeping a safe distance from vehicles ahead or on-coming vehicles.

Do not use the MRCC system in the following locations. Using the MRCC system at the following locations may result in an unexpected accident:

  • General roads other than highways (Driving under these conditions using the MRCC system is not possible.)

  • Roads with sharp curves and where vehicle traffic is heavy with insufficient space between vehicles, or roads where frequent and repetitive acceleration and deceleration occur (Driving under these conditions using the MRCC is not possible).

  • 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).

  • Slippery roads such as ice or snow-bound roads (Tyres could spin causing you to lose vehicle control, or the stop hold control may not operate.)

  • 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.)

  • Slopes with a steep gradient (The vehicle ahead may not be detected correctly.)

  • Two-wheeled vehicles such as motorcycles or bicycles are ahead.

For safety purposes, switch the MRCC system off when it is not being used.

Leaving the MRCC system turned on when it is not in use is dangerous as it could operate unexpectedly, resulting in an accident.

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  • Turn the system off when the vehicle is running on a chassis roller.

  • If your vehicle is towed or you are towing something, switch the MRCC system off to prevent an unexpected operation.

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  • The MRCC system does not detect the following as physical objects.

    • Vehicles approaching in the opposite direction

    • Pedestrians

    • Stationary objects (stopped vehicles, obstructions)

    • If a vehicle ahead is travelling at an extremely low speed, the system may not detect it correctly.

  • If there is a structure on the road or an object (such as a monorail) at a low height off the ground in front of the vehicle, the system may operate. Therefore, do not use the MRCC.

  • Do not use the MRCC system under conditions in which close proximity warnings are frequently activated.

  • 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.

  • While the MRCC system is in use, it does not cancel even if the selector lever (automatic transmission)/shift lever (manual transmission) is operated and any intended engine braking will not occur. If deceleration is required, lower the vehicle speed setting or depress the brake pedal.

  • While braking by the MRCC control is operating, you might hear an operation sound, however, this does not indicate a problem.

  • The brake lights turn on while braking by the MRCC control is operating, however, they may not turn on while the vehicle is on a down slope at the set vehicle speed or travelling at a constant speed and following a vehicle ahead.

  • Stop the headway control function to switch the system to the cruise control function.

    Refer to the Settings section in the Mazda Connect Owner's Manual.

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