Mazda Radar Cruise Control (MRCC)

Mazda Radar Cruise Control (MRCC) (Some Models)

Mazda Radar Cruise Control (MRCC) (Some Models)

MRCC is a system that reduces load on the driver through constant speed and headway control. The function performs headway control to maintain the distance with a vehicle ahead at a constant preset speed without you having to depress the accelerator or brake pedal.

Warnings and Cautions for Using the Mazda Radar Cruise Control (MRCC)

Warnings and Cautions for Using the Mazda Radar Cruise Control (MRCC)

 

Do not rely completely on the MRCC.

The MRCC may not be able to detect a vehicle ahead depending on the type of vehicle ahead and its conditions, the weather conditions, and the road conditions. Additionally, the system might be unable to decelerate sufficiently if the vehicle ahead applies the brakes suddenly or another vehicle cuts into your lane, which could result in an accident.

Always check the surrounding conditions and depress the brake pedal or accelerator pedal while keeping a safe distance from a vehicle ahead or a vehicle following behind you.

Do not use the MRCC under the following conditions. Otherwise, it may result in an accident.

  • The vehicle is driven on roads other than highways.

  • The vehicle is driven on roads with sharp curves or with heavy traffic where sufficient distances between vehicles cannot be kept.

  • The vehicle is driven on roads where acceleration and deceleration are frequently repeated.

  • The vehicle is exiting the main lane on an expressway to enter an interchange, a rest area, or a parking area.

  • The vehicle is driven on slippery roads such as icy roads, snow-covered roads, and unpaved roads.

  • The vehicle is driven on a long downslope.

  • The vehicle is driven on a steep slope.

  • A two-wheeled vehicle such as a motorcycle or bicycle is traveling ahead.

Switch the MRCC off when it is not being used.

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

When stopping the vehicle by MRCC-controlled braking, always depress the brake pedal. (Automatic transmission vehicles only)

The MRCC follows the vehicle ahead and applies MRCC-controlled braking until the vehicle comes to a stop, however, it does not hold the vehicle stopped. Therefore, getting out of the vehicle after stopping while the stop hold control is operating is dangerous as the vehicle may move unexpectedly and result in an accident.

When stopping the vehicle using the MRCC-controlled braking, always depress the brake pedal.

Close Warning
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  • If the vehicle is towed or you are towing something, switch the MRCC off.

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

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How to Use the Mazda Radar Cruise Control (MRCC)

How to Use the Mazda Radar Cruise Control (MRCC)

MRCC operation conditions

The MRCC can be set when all of the following conditions are met.

(Manual transmission vehicle)

  • The brake pedal is not depressed.

  • The vehicle speed is about 30 km/h (19 mph) to 145 km/h (90 mph).

  • The clutch pedal is not depressed.

(Automatic transmission vehicle)

  • The brake pedal is not depressed.

  • The vehicle speed is about 0 km/h (0 mph) to 145 km/h (90 mph).

Setting the MRCC

  1. Press the MRCC switch to turn the system on.

    When the system is on, the MRCC standby indication (white) is displayed on the screen.

  2. Accelerate to the desired speed.

  3. Set the vehicle speed by pressing the RES switch up (SET+) or down (SET-).

    Constant speed driving starts when the vehicle speed is set. In addition, the set speed is displayed on the screen, and the MRCC standby indication (white) changes to the MRCC set indication (green) .

If a vehicle ahead is detected while traveling at a constant speed, the system switches to headway control. The vehicle ahead indication is displayed on the screen while in headway control.

Driving condition

Instrument cluster display

i-ACTIVSENSE display

Other than i-ACTIVSENSE display

During travel at constant speed

During travel under headway control

  1. Set speed

  2. Vehicle ahead indication

 

  • If there is a structure on the road or an obstruction at a low height off the ground in front of the vehicle, the system may recognize it as a vehicle ahead.

  • Acceleration and deceleration by accelerator pedal operation takes priority while traveling at a constant speed or in headway control. When the accelerator pedal is released, the vehicle returns to driving at a constant speed or headway control at the set speed.

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

  • While driving using the MRCC, intended engine braking is not applied even if the selector lever/shift lever is operated.

  • The brake lights turn on while the brakes are operating by the MRCC control.

  • The MRCC is also turned off automatically when the vehicle power is switched OFF.

  • If the distance between vehicles control is disabled using Mazda Connect, the system switches to the cruise control. At this time, the MRCC switch functions as the cruise control switch.

    Set in the Mazda Connect “Settings” or consult an Authorized Mazda Dealer.

    If the vehicle power is switched OFF while the distance between vehicles control is disabled, the distance between vehicles control is enabled automatically the next time the vehicle power is switched ON.

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(Manual transmission vehicle)

The shift-up or shift-down request display might be displayed while the MRCC is operating. When this occurs, shift gears because the gear position is not appropriate.

 

  • The MRCC may be canceled automatically if the shift up/shift down is not done even when the shift up/shift down request display is indicated. In addition, the engine may be damaged or the engine may stall.

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Changing the set vehicle speed

Changing the set vehicle speed using the RES switch

Press the RES switch up (SET+) or down (SET-) to the desired speed.

  • Press and release immediately: 1 km/h (1 mph)

  • Press and hold: 10 km/h (5 mph)

Changing the set vehicle speed using the accelerator pedal

Depress the accelerator pedal until the vehicle speed reaches the desired speed, then press the RES switch up (SET+) or down (SET-).

Reading the set vehicle speed from the speed limit sign using the RES switch (Speed Limit Assist only)

Press the RES switch when the speed limit sign set indication turns on.

 

  • The function which recognizes speed limit signs has limitations. Always check the set vehicle speed that was read.

  • Set the speedometer display unit to the same unit as the speed limit sign. Differing units will capture speeds not intended by the driver.

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  • The Speed Limit Assist operates only when the navigation system's SD card is inserted.

  • The Speed Limit Assist uses the Traffic Sign Recognition system (TSR).

    Refer to Traffic Sign Recognition System (TSR) (Search).

  • The Speed Limit Assist cannot read speeds of less than 30 km/h (19 mph).

  • Set vehicle speeds read from speed limit signs can be adjusted.

    Set in the Mazda Connect “Settings” or consult an Authorized Mazda Dealer.

  • The Speed Limit Assist can be turned off.

    Set in the Mazda Connect “Settings” or consult an Authorized Mazda Dealer.

Close Note
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Setting the distance-between-vehicles during headway control

  1. Press the CNCL switch up (longer distance) or down (shorter distance).

MRCC is not operating (white)

Distance-between-vehicles guideline

(at 80 km/h (50 mph) vehicle speed)

Instrument cluster display

Long (about 50 m (164 ft))

Medium (about 40 m (131 ft))

Short (about 30 m (98 ft))

Extremely short (about 25 m (82 ft))

MRCC is operating (green)

Distance-between-vehicles guideline

(at 80 km/h (50 mph) vehicle speed)

Instrument cluster display

Long (about 50 m (164 ft))

Medium (about 40 m (131 ft))

Short (about 30 m (98 ft))

Extremely short (about 25 m (82 ft))

 

  • The distance-between-vehicles can be set to 4 levels: Long, medium, short, and extremely short distance.

  • The distance-between-vehicles differs depending on the vehicle speed, and the slower the vehicle speed, the shorter the distance.

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Close proximity warning

If your vehicle approaches a vehicle ahead while in headway control, a warning sound and a display cautions you.

  1. “Depress Brake Pedal”

 

The close proximity warning may not be activated in the following cases.

  • The vehicle is driven at the same speed as the vehicle ahead.

  • Directly after the MRCC is set.

  • Immediately after the accelerator pedal is released.

  • Another vehicle cuts into the driving lane.

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

Close Note
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The MRCC is canceled temporarily

If any of the following conditions is met, the MRCC is canceled temporarily.

  • The brake pedal is depressed.

  • The CNCL switch is pressed one time.

  • The DSC has operated.

  • The Smart Brake Support (SBS) has operated.

  • The front radar sensors cannot detect target objects.

  • The parking brake is applied.

  • Any door is opened.

  • The driver’s seat belt is unfastened.

  • The frequency of the braking operation by the MRCC is high.

  • (Automatic transmission vehicle)

    • The vehicle is stopped by MRCC-controlled braking.

  • (Manual transmission vehicle)

    • The vehicle speed decreases to less than 25 km/h (16 mph).

    • The clutch pedal is depressed for a certain period of time.

    • The shift lever is shifted to neutral (N) for a certain period of time.

If the MRCC is temporarily canceled, it will resume operation at the previously set speed by pressing the RES switch.

Turning off the MRCC

Press the MRCC switch.

The MRCC set indication (green) /MRCC standby indication (white) turns off, and the MRCC turns off.

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