2024 ACURA MDX Adaptive Cruise Control (ACC) Owner’s Manual
The adaptive cruise control (ACC) in the 2024 Acura MDX is a helpful driver-assist feature that ensures a safe distance is maintained from the vehicle ahead by automatically adjusting the car’s speed. This feature guarantees a more secure and relaxed driving experience, particularly during extended journeys on the highway, making it a valuable addition.
2024 Acura MDX Specs, Price, Features, Mileage And Review
Adaptive Cruise Control (ACC) with Low-Speed Follow
Helps maintain a constant vehicle speed and a set following-interval behind a vehicle detected ahead of yours and, if the detected vehicle comes to a stop, can decelerate and stop your vehicle, without you having to keep your foot on the brake or the accelerator.
When ACC with Low Speed Follow slows your vehicle by applying the brakes, your vehicle’s brake lights will illuminate.
- Vehicle speed for ACC with Low-Speed Follow: A vehicle is detected ahead within ACC with Low-Speed Follow range – ACC with Low-Speed Follow operates at speeds up to 90 mph (145 km/h).
No vehicle is detected within ACC with Low-Speed Follow range – ACC with Low-Speed Follow operates at the speed of about 25 mph (40 km/h) or above. - Shift position for ACC with Low-Speed Follow: In (D or (S.
WARNING
Improper use of ACC with Low-Speed Follow can lead to a crash.
Use ACC with Low-Speed Follow only when driving on expressways or freeways and in good road and weather conditions.
WARNING
ACC with Low-Speed Follow has limited braking capability and may not stop your vehicle in time to avoid a collision with a vehicle that quickly stops in front of you.
Always be prepared to apply the brake pedal if the conditions require.
Important Reminder
As with any system, there are limits to ACC with Low-Speed Follow. Use the brake pedal whenever necessary, and always keep a safe interval between your vehicle and other vehicles.
How to activate the system
For directions on the proper handling of the radar sensor, refer to the following page.
You can read about handling information for the camera equipped with this system.
ACC with Low-Speed Follow may not work properly under certain conditions.
ACC with Low-Speed Follow Conditions
When not using ACC with Low Speed Follow: Turn off adaptive cruise by pressing the
button.
Do not use ACC with Low-Speed Follow under the following conditions.
- Driving in continuous stop and go traffic.
- On roads with sharp turns.
- On roads with steep downhill sections, as the set vehicle speed can be exceeded by coasting. In such cases, ACC with Low Speed Follow will not apply the brakes to maintain the set speed.
- On roads with toll collection facilities or other objects between lanes of traffic, or in parking areas, or facilities with drive through access.
To Set the Vehicle Speed
When driving at about 25 mph (40 km/h) or above: Take your foot off the pedal and press down the RES/+/SET/– switch when you reach the desired speed. The moment you release the switch, the set speed is fixed, and ACC with Low Speed Follow begins.
The vehicle stability assistTM (VSA®) system, adaptive cruise control (ACC) with low speed follow, safety support and low tire pressure/TPMS indicators may come on in amber along with a message in the driver information interface when you set the power mode to ON after reconnecting the battery.
Drive a short distance at more than 12 mph (20 km/h). Each indicator should go off. If any do not, have your vehicle checked by a dealer.
You can switch the displayed set speed measurements on the gauge between mph and km/h.
When driving slower than about 25 mph (40 km/h): If the vehicle is moving and the brake pedal is not depressed, pressing the switch fixes the set speed to about 25 mph (40 km/h) regardless of current vehicle speed. While stationary and a vehicle is ahead of you, the vehicle speed can be set, even with the brake pedal depressed.
When ACC with Low Speed Follow starts operating, the vehicle icon, interval bars and set speed appear on the gauge.
When you use ACC with Low Speed Follow, Straight Driving Assist (a feature of the Electric Power Steering system) is activated.
By enabling the steering system to automatically compensate for natural steering pull, Straight Driving Assist makes it easier for you to keep your vehicle in a straight line.
When in Operation
There is a vehicle ahead
ACC with Low Speed Follow monitors if a vehicle ahead of you enters the ACC with Low Speed Follow range. If a vehicle is detected doing so, the ACC with Low Speed Follow system maintains or decelerates your vehicle’s set speed in order to keep the vehicle’s set following-interval from the vehicle ahead.
When a vehicle whose speed is slower than your set speed is detected in front of you, your vehicle starts to slow down.
If the vehicle detected ahead of you slows down abruptly, or if another vehicle is detected cutting in front of you, a beeper sounds and a message appears on the driver information interface, and the head-up warning lights* come on.
Depress the brake pedal, and keep an appropriate interval from the vehicle ahead.
There is no vehicle ahead
Your vehicle maintains the set speed without having to keep your foot on the brake or accelerator pedal.
If there previously was a vehicle detected ahead that kept your vehicle from traveling at the set speed, ACC with Low Speed Follow accelerates your vehicle to the set speed, and then maintains it.
When you depress the accelerator pedal
You can temporarily increase the vehicle speed. In this case, there is no audible or visual alert even if a vehicle is in the ACC with Low Speed Follow range.
ACC with Low Speed Follow stays on unless you cancel it. Once you release the accelerator pedal, the system resumes the set speed.
There are times when the vehicle speed will decrease when the accelerator pedal is lightly applied.
Even if the interval between your vehicle and the vehicle detected ahead is short, ACC with Low Speed Follow may start accelerating your vehicle under the following circumstances:
- The vehicle ahead of you is going at almost the same speed as, or faster than, your vehicle.
- A vehicle that cuts in front of you is going faster than your vehicle, gradually increasing the interval between the vehicles.
You can also set the system to beep when a vehicle in front of you comes in and goes out of the ACC with Low Speed Follow detecting range. Change the ACC Forward Vehicle Detect Beep setting.
Limitations
You may need to use the brake to maintain a safe interval when using ACC with Low-Speed Follow. Additionally, ACC with Low-Speed Follow may not work properly under certain conditions.
A vehicle detected ahead is within ACC with Low-Speed Follow range and slows to a stop
Your vehicle also stops, automatically. The Stopped message appears on the gauge. When the vehicle ahead of you starts again, if you press the RES/+/SET/– switch up or down, or depress the accelerator pedal, ACC with Low Speed Follow operates again within the prior set speed.
If no vehicle is ahead of you before you resume driving, depressing the accelerator pedal will resume the operation of ACC with Low-Speed Follow within the prior set speed.
WARNING
Exiting a vehicle that has been stopped while the ACC with Low-Speed Follow system is operating can result in the vehicle moving without operator control.
A vehicle that moves without operator control can cause a crash, resulting in serious injury or death.
Never exit a vehicle when the vehicle is stopped by ACC with Low-Speed Follow.
ACC with Low-Speed Follow Conditions and Limitations
The system may automatically shut off under certain conditions. Some examples of these conditions are listed below. Other conditions may reduce some of the ACC with Low-Speed Follow functions.
Environmental conditions
Driving in bad weather (rain, fog, snow, etc.).
Roadway conditions
Driving on a roadway with reduced traction or obscured lane markings, vehicle tracks, reflected lights, road spray, or high contrast.
Vehicle conditions
- The outside of the windshield is blocked by dirt, mud, leaves, wet snow, etc.
- An abnormal tyre or wheel condition (incorrect sizes, varied sizes or construction, improperly inflated, compact spare tyre*, etc.).
- The camera temperature gets too high.
- The parking brake is applied.
- The front grille is dirty.
- The vehicle is tilted due to a heavy load or suspension modifications.
- Tire chains are installed.
- The vehicle is towing a trailer.
Models with Electronic Air Suspension (EAS) -
The EAS is malfunctioning.
The radar sensor for ACC with Low-Speed Follow is shared with the Collision Mitigation Braking SystemTM (CMBSTM).
Detection limitations
- A vehicle or pedestrian suddenly crosses in front of you.
- The interval between your vehicle and the vehicle or pedestrian ahead of you is too short.
- A vehicle cuts in front of you at a slow speed, and it brakes suddenly.
- You accelerate rapidly and approach the vehicle or pedestrian ahead of you at high speed.
-
The vehicle ahead of you is a motorcycle, bicycle, mobility scooter, or other small vehicle.
-
There are animals in front of your vehicle.
-
You drive on a curved or winding or undulating road that makes it difficult for the sensor to properly detect a vehicle or a pedestrian in front of you.
- The speed difference between your vehicle and a vehicle in front of you is significantly large.
- An oncoming vehicle suddenly comes in front of you.
- Your vehicle abruptly crosses over in front of an oncoming vehicle.
If you need the radar sensor to be repaired, or removed, or the radar sensor cover is strongly impacted, turn off the system by pressing the button and take your vehicle to a dealer.
Have your vehicle checked by a dealer if you find any unusual behaviour in the system (e.g., the warning message appears too frequently).
- Driving through a narrow metal bridge.
- The vehicle ahead of you brakes suddenly.
- The vehicle ahead of you has a unique shape.
- Your vehicle or the vehicle ahead of you is driving on one edge of the lane.
To Adjust the Vehicle’s Speed
Increase or decrease the vehicle speed using the RES/+/SET/– switch on the steering wheel.
- Each time you press the RES/+/SET/– switch up or down, the vehicle speed is increased or decreased by about 1 mph or 1 km/h accordingly.
- If you keep the RES/+/SET/– switch pressed up or down, the vehicle speed increases or decreases by about 5 mph or 5 km/h accordingly.
If a vehicle detected ahead is going at a speed slower than your increased set speed, ACC with Low-Speed Follow may not accelerate your vehicle. This is to maintain the set interval between your vehicle and the vehicle ahead.
When you depress the accelerator pedal and then press down and release the RES/+/SET/– switch, the current speed of the vehicle is set.
To Set or Change Following-interval
Press the interval button to change the ACC with Low-Speed Follow the following interval. Each time you press the button, the following interval (the interval behind a vehicle detected ahead of you) cycles through short, middle, long, and extra-long intervals.
Determine the most appropriate following-interval setting based on your specific driving conditions. Be sure to adhere to any following interval requirements set by local regulations.
The higher your vehicle’s following speed is, the longer the short, middle, long or extra-long following interval becomes. See the following examples for your reference.
|
Following-interval |
When the Set Speed is: |
||
| 50 mph (80 km/h) | 65 mph (104 km/h) | ||
| Short |  |
83 feet
25 meters 1.1 sec |
100 feet
31 meters 1.1 sec |
| Middle |  |
110 feet
33 meters 1.5 sec |
137 feet
42 meters 1.5 sec |
| Long |  |
154 feet
47 meters 2.1 sec |
200 feet
61 meters 2.1 sec |
| Extra Long |  |
213 feet
65 meters 2.9 sec |
282 feet
86 meters 2.9 sec |
When your vehicle stops automatically because a vehicle detected ahead of you has stopped, the interval between the two vehicles will vary based on the ACC with Low-Speed Follow interval setting.
To Cancel
To cancel ACC with Low-Speed Follow, do any of the following:
- Press the CANCEL button.
- The indicator (green) on the gauge changes to theindicator (white).
- The indicator
- Press the button.
- indicator(green) goes off.
- indicator
- Depress the brake pedal while the vehicle is moving forward.
- Theindicator (green) on the gauge changes to the
- indicator (white).
- The
Resuming the prior set speed: After you have cancelled ACC with Low-Speed Follow, you can activate the ACC with Low-Speed Follow with the prior set speed displayed on the gauge (Outlined) by pressing the RES/+/SET/– switch up even if the vehicle is stopped.
When you turn the ACC with Low-Speed Follow off by pressing the CANCEL button or depressing the brake pedal, the prior set speed is displayed on the gauge (Outlined).
When pressing the RES/+/SET/– switch up, the ACC with Low-Speed Follow is activated with the displayed speed.
If the indicator (white) is displayed and you press the RES/+/SET/– switch up, but no prior set speed (Outlined) is displayed, the speed will be set to your vehicle’s current speed.
The set speed cannot be set or resumed when ACC with Low-Speed Follow has been turned off using thebutton. Press the button to activate the system, then set the desired speed.
Automatic cancellation
The beeper sounds and a message appears on the driver information interface when ACC with Low Speed Follow is automatically canceled. Any of these conditions may cause the ACC with Low-Speed Follow to automatically cancel:
- Bad weather (rain, fog, snow, etc.)
- When the radar sensor behind the emblem gets dirty.
- The vehicle ahead of you cannot be detected.
- An abnormal tire condition is detected, or the tires are skidding.
- Driving on a mountainous road, or driving off road for extended periods.
- Abrupt steering wheel movement.
- When the ABS, VSA®, CMBSTM, or Low Speed Braking Control is activated.
- When the ABS or VSA® system indicator comes on.
- When the vehicle is stopped on a very steep slope.
- When you manually apply the parking brake.
- When the detected vehicle within the ACC with Low-Speed Follow range is too close to your vehicle.
- The camera behind the rearview mirror, or the area around the camera, including the windshield, gets dirty.
- When the Maximum Load Limit is exceeded.
- When passing through an enclosed space, such as tunnel.
- The vehicle has repeatedly applied the brakes to maintain the set speed (for example, you are descending a long slope).
The ACC with Low-Speed Follow automatic cancellation can be also triggered by the following causes. In these cases, the electric parking brake will be automatically applied.
- The driver’s seat belt is unfastened when the vehicle is stationary.
- The vehicle stops for more than 10 minutes.
- The engine is turned off.
Even though ACC with Low-Speed Follow has been automatically canceled, you can still resume the prior set speed. Wait until the condition that caused ACC with Low Speed Follow to cancel improves, then press the RES/+/SET/– switch up or down.
To Switch ACC with Low-Speed Follow to Cruise Control
Press and hold the interval button for one second. Cruise mode selected appears on the driver information interface for two seconds, and then the mode switches to Cruise.
The 
comes on.
- White: The system is standby.
- Green: The system is on.
To switch back to ACC with Low-Speed Follow, press and hold the interval button again for one second. ACC mode selected appears on the driver information interface for two seconds.
When to use
Desired speed in a range above roughly 25 mph (40 km/h).
To Set the Vehicle Speed
Take your foot off the pedal and press the RES/+/SET/– switch down when you reach the desired speed.
The moment you release the RES/+/SET/– switch, the set speed is fixed, and cruise control begins. The indicator (green) comes on.
When you use cruise control, Straight Driving Assist (a feature of the Electric Power Steering system) is activated.
By enabling the steering system to automatically compensate for natural steering pulls, Straight Driving Assist makes it easier for you to keep your vehicle in a straight line.
Always be aware of which mode you are in. When you are driving in Cruise mode, the system will not assist you to maintain a following interval from a vehicle ahead of you.
You can switch the displayed set speed measurements on the gauge or audio/information screen between mph and km/h.
To Adjust the Vehicle’s Speed
Each time you press the RES/+/SET/– switch up or down, the vehicle speed is increased or decreased by about 1 mph (1 km/h).
If you keep the RES/+/SET/– switch pressed up or down, the vehicle speed increases or decreases by about 5 mph or 5 km/h accordingly.
To Cancel
To cancel cruise control, do any of the following:
- Press the CANCEL button.
- The indicator (green) on the gauge changes to the indicator (white).
- The
- Press the button.
- indicator (green) goes off.
- Depress the brake pedal.
- Thethe indicator (green) on the gauge changed to indicator (white).
- The
Resuming the prior set speed
After you have cancelled cruise control, you can activate the cruise control with the prior set speed displayed on the gauge (Outlined) by pressing the RES/+/SET/– switch up while driving at a speed of at least 25 mph (40 km/h) or more.
When you turn the cruise control off by pressing the CANCEL button or depressing the brake pedal, the prior set speed is displayed on the gauge in the contour line.
When pressing the RES/+/SET/– switch up, the cruise control is activated with the displayed speed.
If the indicator (white) is displayed and you press the RES/+/SET/– switch up, but no prior set speed (Outlined) is displayed, the speed will be set to your vehicle’s current speed.
You cannot set or resume in the following situations:
- When vehicle speed is less than 25 mph (40 km/h).
- When thebutton is turned off.
At vehicle speeds of 22 mph (35 km/h) or less, cruise control is canceled automatically.
FAQ’s
Adaptive Cruise Control (ACC) in the 2024 ACURA MDX is an advanced driver assistance system that automatically adjusts the vehicle’s speed to maintain a safe distance from the vehicle ahead. It helps to reduce driver fatigue during long drives and enhances overall driving convenience.
To activate ACC, press the ACC button on the steering wheel. Once activated, you can set your desired speed and following distance. The system will take over and adjust the vehicle’s speed as needed.
While ACC is highly effective in various driving conditions, it is primarily designed for highway and open road driving. It may not perform optimally in adverse weather conditions or on roads with sharp curves. Always remain attentive and be prepared to take control of the vehicle.
ACC can contribute to improved fuel efficiency by maintaining a steady speed and reducing unnecessary acceleration and braking. However, actual fuel savings will vary based on driving habits and conditions.
To turn off ACC, you can press the ACC button on the steering wheel again or press the brake pedal. This will deactivate the system and return control of the vehicle’s speed to the driver.
Useful Links
View Full PDF: 2024 ACURA MDX Owner’s Manual | Auto User Guide