Adaptive Cruise Control
The Adaptive Cruise Control (ACC) system is designed to maintain a set speed and a pre-selected distance from the vehicle ahead. It automatically adjusts the vehicle's speed using the engine and brakes.
System Overview
The ACC system allows for speed settings between 32 to 200 km/h (20 to 124 mph). It is important to note that ACC is not a collision warning or prevention system. It does not react to stationary objects, vehicles moving below 10 km/h (6 mph), pedestrians, or vehicles in adjacent lanes.
The system utilizes a radar sensor located in the front of the vehicle, typically behind the grille, to detect obstacles.
Limitations and Important Notes:
- ACC should only be used in favorable driving conditions, such as on highways with orderly traffic flow.
- Avoid using ACC on sharp or steep turns, in poor visibility conditions (fog, heavy rain, snow), or on icy/slippery roads.
- The driver remains responsible for attentive and safe driving at all times.
- Ensure the front of the vehicle is clear of emblems or metallic objects that could obstruct the radar sensor.
Using Adaptive Cruise Control
The system is operated via steering wheel controls. The driver can override ACC at any time by applying the brake or accelerator pedals.
Steering Wheel Controls:
- SET+: Press to set or increase speed.
- RES (Resume): Press to resume previously set speed.
- Press to decrease set speed.
- CANCEL: Press to temporarily disable ACC while retaining the set speed in memory.
- Press to decrease the following distance.
- Press to increase the following distance.
Engaging Distance Keeping Mode
When ACC is active, the vehicle will maintain a set distance from the vehicle ahead. If the vehicle in front accelerates beyond the set speed, changes lanes, or if a new distance setting is selected, the ACC will adjust accordingly.
The system automatically applies brakes to reduce speed and maintain the set distance. The maximum braking force is limited, and the driver may need to intervene.
Note: Driver intervention in braking will disengage ACC. If ACC determines its maximum braking is insufficient, a warning will sound, and a message like "DRIVER INTERVENE" may appear on the information display.
The vehicle will automatically resume the set speed when the road ahead is clear, for example, when the vehicle ahead accelerates or changes lanes.
Note: Using the turn signal may cause ACC to reduce the following distance for a quicker response to an anticipated maneuver.
Changing Distance in Distance Keeping Mode
The driver is responsible for selecting an appropriate following distance based on driving conditions. There are typically four distance settings available, indicated on the information panel.
Blocking Cruise Control and Distance Keeping Mode
If the driver presses the accelerator pedal, ACC will not apply brakes to maintain distance. Pressing the accelerator while ACC is active will override the set speed or distance. A message like "CRUISE OVERRIDE" may appear.
Upon releasing the accelerator, ACC will resume, and the vehicle speed will adjust to the preset speed or a lower speed if a distance-saving mode is active.
Queue Assist
Queue Assist is an enhancement to ACC that allows the vehicle to follow the vehicle ahead to a complete stop. It is intended for use in traffic queues on highways.
If the vehicle ahead stops, Queue Assist will bring the vehicle to a halt and hold it stationary. The electronic parking brake (EPB) may be engaged automatically if the vehicle remains stopped for over two minutes, if the driver intends to exit, or if a malfunction is detected.
To resume driving after the vehicle ahead starts moving, a brief press of the accelerator pedal will reactivate ACC.
Note: Queue Assist may stop the vehicle in front of stationary objects, such as a parked car, which could lead to unexpected braking.
Automatic ACC Disengagement
ACC will disengage but retain its settings in memory under the following conditions:
- CANCEL button pressed.
- Brake pedal pressed.
- Gear selector in Neutral (N).
- Dynamic Stability Control (DSC) engaged.
- Electronic Traction Control (ETC) engaged.
- Hill Descent Control (HDC) engaged.
ACC settings are cleared from memory under the following conditions:
- Ignition turned off.
- Maximum vehicle speed reached.
- ACC system malfunction.
Resuming Cruise Control and Distance Keeping
Use the RES button only when you are certain of the previously set speed. Pressing RES after an ACC cancellation (e.g., after braking) will reactivate ACC if the speed setting is still in memory. The vehicle will resume the set speed, provided no distance-keeping adjustments are needed.
Queue Assist resumes at speeds above 10 km/h (6 mph).
Note: Acceleration after resuming speed is adjusted based on the previously set distance. Smaller distances result in quicker acceleration. Acceleration may be reduced in turns.
Driving Tips
In certain situations, ACC may signal the need for driver intervention. This is usually accompanied by an audible alert and a message like "DRIVER INTERVENE" on the information panel.
Reasons for intervention include system malfunctions or insufficient braking force.
Note: ACC operates only when the gear selector is in Drive (D). The accelerator pedal remains in its upper position when ACC is engaged; release it fully for normal operation.
Note: Brake lights illuminate when ACC is braking.
Note: If the vehicle is equipped with a "stop-start" system, it may operate when the vehicle is stopped by Queue Assist. Press the accelerator longer than usual to restart the engine and begin moving.
Detection Sensor Issues
Obstacle detection problems can occur in the following situations:
- Driving on a different trajectory than the vehicle ahead.
- When a vehicle changes into your lane, it may only be detected after the maneuver is complete.
- Problems may arise when entering or exiting turns.
- When maneuvering around a stationary vehicle, which can cause uncertainty about which vehicle to follow.
- When the vehicle ahead leaves your lane, which can cause uncertainty about which vehicle to follow.
In these scenarios, ACC may react unexpectedly, requiring driver attention and intervention.
ACC Malfunction:
If an ACC malfunction occurs, the system will disable itself and cannot be reactivated until the fault is resolved. A message like "DRIVER INTERVENE" followed by "CRUISE NOT AVAILABLE" may be displayed.
System Limitations and Warnings
ACC operation can be interrupted by dirt, snow, or ice on the radar sensor or its cover. Aftermarket accessories or metallic emblems on the vehicle's front can also affect ACC performance.
If these conditions occur while ACC is in distance-keeping mode, an audible alert and "DRIVER INTERVENE" message will appear, followed by "RADAR SENSOR BLOCKED." The system will return to normal operation once the obstruction is removed.
If the radar sensor is blocked when ACC is initially turned on or is already off, the "RADAR SENSOR BLOCKED" message will appear.
Note: Incorrect tire types or sizes may affect ACC accuracy.
Forward Alert Function
The Forward Alert function provides limited detection and warning of objects ahead. If an object is detected within the driver's visible range, an audible warning and a "FORWARD ALERT" message will be displayed.
This function utilizes the same radar sensor as ACC and is subject to the same operational limitations.
The Forward Alert sensitivity can be adjusted via the ACC controls on the steering wheel when ACC is turned off. Press the distance decrease button to view the current setting and press again to decrease sensitivity. Press the distance increase button to view the current setting and press again to increase sensitivity.
Intelligent Emergency Braking (IEB)
The IEB system uses the same radar sensor as ACC and Forward Alert, sharing the same operational limitations.
When ACC is installed, IEB can function at any vehicle speed, even if Forward Alert or ACC is turned off. IEB is designed to reduce the severity of a collision with a slower-moving vehicle ahead if a collision is unavoidable.
If a collision risk is detected, an audible warning is issued. If a collision becomes imminent, IEB applies maximum braking force. After IEB activation, a message "IEB System Was Activated" will appear, and the system will be disabled until reset by a dealer or authorized workshop.
If the radar sensor is obstructed (e.g., by snow, heavy rain) or if the system has a fault, a "IEB Not Available" message will be displayed. The vehicle can still be driven, and the braking system will function, but IEB will not be active. Contact a dealer or authorized workshop for assistance.
Intelligent Emergency Braking Warnings:
- The system may not react to slow-moving vehicles.
- The system does not react to stationary vehicles or vehicles moving in the opposite direction.
- Warnings may not be displayed, and automatic braking may not occur if the distance to the vehicle ahead is too short, or if the steering wheel or pedal input is too large (e.g., during an evasive maneuver).