Adaptive Cruise Control Overview
Warning: The Detroit Assurance Collision Mitigation System is intended solely as an aid for an alert and conscientious professional driver. It is not intended to be relied upon to operate a vehicle. Use the system in conjunction with rearview mirrors and other instruments to safely operate the vehicle.
The Detroit Assurance Collision Mitigation System is not a substitute for safe, normal driving procedures, nor will it compensate for any driver impairment such as drugs, alcohol, or fatigue.
Failure to drive safely and use the system properly could result in personal injury and/or death and severe property damage.
See Table and Fig. for a description of cruise control steering wheel switches.
Table 1, Steering Wheel Controls
|
Steering Wheel Controls |
|
|---|---|
|
Description |
Function |
|
/SET |
Sets the cruise speed while the vehicle is traveling at the desired speed. Pressing and holding decreases the set cruise speed. |
|
+/RES |
Resumes the set speed. Pressing and holding increases the set cruise speed. |
|
CNCL |
Deactivates cruise control, but retains the set speed in memory. |
Table 1, Steering Wheel Controls
-
Cruise Accelerate/Resume
-
Quick Access System Settings
-
Cruise Decelerate/Set
-
Phone Hang-Up/Reject
-
Marker Interrupt (not available in all markets)
-
Phone Pick-Up
-
Headlamp Interrupt (not available in all markets)
-
Cancel Cruise Control
Fig. 1, Steering-Wheel-Mounted Right-Hand Switch Pod, ICUC
When a vehicle is detected in front, the driver display shows a generic image of the detected vehicle with the speed of and the distance to the detected vehicle at the top. An example of how this looks on the ICUC screen is shown in Fig..
Fig. 2, Adaptive Cruise Control (ACC) Screen - ICUC
Adaptive Cruise Control Functions and Activation Conditions
Adaptive cruise control (ACC) controls the speed of the equipped vehicle to maintain a safe distance from a vehicle detected in front.
If ACC detects a vehicle in front driving at a slower speed, the engine is defueled, the engine brakes are activated, and the service brakes are applied, slowing the vehicle to maintain the set following distance. The standard factory set following distance is 3.6 seconds; for vehicles configured with adjustable headway, this can be adjusted under the 'Cruise Control' menu under 'Vehicle Settings.'
ACC allows the vehicle to operate in cruise all the way down to 0 mph (0km/h); as traffic in front of the vehicle slows and eventually stops, the vehicle will adjust with the traffic all the way to 0 mph (0km/h).
If the vehicle ahead is stopped for two seconds or less, ACC will resume when the vehicle ahead moves. If the vehicle ahead is stopped for more than two seconds, the driver after carefully checking surrounding traffic will need to press the resume button or tap the accelerator pedal to resume moving forward.
The ACC will also slow the vehicle if it exceeds the set speed (on a downhill grade, for example).
If there is no vehicle in front, ACC operates in the same way as cruise control when the vehicle is traveling above 10 mph (15 km/h).
Important: Nothing should be put between the driver and the seat, such as a heating pad, massage pad, or similar items. Doing so may keep the seat occupancy sensor from functioning correctly.
ACC to 0 mph verifies seat occupancy before resuming forward motion after slowing down to 0 mph.
ACC cannot be activated, or is automatically deactivated, if:
-
the driver is not in their seat to activate the seat occupancy sensor;
-
the vehicle is traveling slower than 10 mph (15 km/h);
-
the transmission is in neutral for more than 5 seconds;
-
reverse gear is selected;
-
the Anti-Lock Braking System (ABS) is deactivated;
-
there is a malfunction in the brake system or the electronic management system; or
-
the distance sensor initialization is not yet complete.
Activating Adaptive Cruise Control and Setting the Speed
Activate ACC by setting the cruise speed, using the controls on the steering wheel. See Table.
When driving at the desired speed, press the /SET switch to activate ACC and store the set speed.
If cruise control is deactivated, the stored speed can be activated again by pressing the +/RES switch on the steering wheel switch pod. When activated, the driver display shows the adaptive cruise control telltale and the set speed.
If the brake pedal is pressed, ACC is deactivated automatically.
If ACC becomes unavailable, a message appears on the driver display screen. If the vehicle is programmed to allow for standard cruise control, the message displayed allows the driver to use standard cruise control. See Fig..
Fig. 3, Adaptive Cruise Control (ACC) Unavailable - ICUC
Increasing or Reducing Adaptive Cruise Control Speed
The ACC speed setting can only be set when driving.
Press the /SET switch on the steering wheel switch pod to set the cruise speed when the vehicle is traveling at the desired speed. To decrease the set cruise speed, press and hold /SET.
Setting the Adaptive Cruise Control Distance to the Vehicle in Front
If equipped, the ACC ICUC menu under 'Settings' > 'Safety Systems Settings' > 'More Information' > 'Adaptive Cruise Control' can be used to set the overspeed and underspeed limits and the following distance to the vehicle in front.
If equipped, the ACC ICC5 following distance can be adjusted under 'Settings' > 'Driving Assistance' > 'Adaptive Cruise Control.'
Important: Make sure that the minimum distance required by law is maintained.
Overtaking When Using Adaptive Cruise Control
Note: It is possible to exceed the set speed when overtaking.
The set speed of ACC can be exceeded using the accelerator pedal. When the accelerator pedal is released, the ACC set speed will be resumed.
Deactivating Adaptive Cruise Control
To deactivate ACC, press the CNCL switch on the steering wheel switch pod or press the brake pedal.
Note: The set speed remains stored when ACC is deactivated.