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Mazda 3 Owners Manual: Mazda Radar Cruise Control (MRCC)

Mazda 3 Owners Manual / When Driving / i-ACTIVSENSE / Mazda Radar Cruise Control (MRCC)

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.

*1 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 expressway

WARNING 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 specifi cally, 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 suffi ciently 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:

  • Roads with sharp curves and where vehicle traffi c is heavy and there is insuffi cient 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).
  • 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 (The tires could spin causing you to lose vehicle control).
  • 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.

CAUTION If the vehicle is towed or you are towing something, switch the Mazda Radar Cruise Control (MRCC) system off to prevent an incorrect operation.

NOTE

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 active driving display.

Mazda 3. Mazda Radar Cruise Control (MRCC) Display Indication


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.

Mazda 3. Close Proximity Warning


Setting the System

Mazda 3. 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 active driving display.

NOTE Whben 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.

How to Set the Speed

  1. Adjust the vehicle speed to the desired setting using the accelerator pedal.
  2. 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.

Mazda 3. How to Set the Speed




Travel status

Display

During travel at constant speed

During travel under headway control

NOTE

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.





Distance-betweenvehicles guideline (at 80 km/h (50 mph) vehicle speed)

Indication on 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))

NOTE

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.

Short press 1 km/h (1 mph)
Long press 10 km/h (5 mph)

NOTE 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.

CAUTION The warnings and brake control do not operate while the accelerator pedal is depressed.

NOTE

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.

NOTE

Shift-up/Shift-down Request Display (Manual Transaxle)

The shift-up or shift-down request display in the active driving display may be displayed while the Mazda Radar Cruise Control (MRCC) system is operating.

When this occurs, shift gears because the gear position is not appropriate.



Request

Indication on display

Shift up

Shift down

NOTE

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