Cruise Control - Overview: Overview
The cruise control system is controlled by the PCM.
The cruise control mode is selected from the steering wheel mounted switches (ON/OFF, SET+, SET-, GAP+, GAP- and CAN/RES), which are integrated into the LH steering wheel switch.
The gap setting is selected from the steering wheel mounted switch (GAP), which is integrated into the LH steering wheel switch.
The cruise control system maintains a selected vehicle speed between 29 km/h (18 mph) and the maximum limited vehicle speed. When a MyKey ® restricted key is in use and max speed limiter is turned on, vehicle speed is limited to 130 km/h (80 mph).
During normal driving, the vehicle speed can vary slightly from the set speed due to road conditions. The vehicle speed can fluctuate when driving up and down a steep hill. If the vehicle speed decreases more than 16 km/h (10 mph) below the set speed, the cruise control disengages.
| Item | Description |
|---|---|
| 1 | Cruise Control Module |
Cruise Control Operation NOTE: For a complete illustration of the adaptive cruise control indicators and graphic displays, refer to the Owner's Literature. The adaptive cruise control system functions much like a standard cruise control system. The adaptive cruise control system automatically adjusts the vehicle speed to maintain a set distance gap from the front of the vehicle and the vehicle in the same path of travel. When the adaptive cruise control system is on and is following a vehicle or a vehicle enters the same driving lane, a follow vehicle graphic is displayed in the message center. The adaptive cruise control system does not function if the vehicle speed is below 20 km/h (12 mph). As the vehicle slows down during automatic braking, the adaptive cruise control system discontinues braking at 20 km/h (12 mph). At that speed, an audible alarm sounds and the automatic braking from the ABS module is released. The driver must take over the vehicle braking control. The cruise control deactivator switch (which is integral to the BPP (brake pedal position) switch) is an additional safety feature. When the brake pedal is pressed, an electrical signal is sent from the BPP switch to the PCM deactivating the cruise control system. Under increased brake pedal effort, the cruise control system deactivator switch opens and removes the ground signal from the PCM input circuit, releasing the throttle and immediately deactivating the system. The CCM monitors the yaw rate signal from the ABS module and compares it to the wheel speed and steering wheel angle signals. If the ABS module determines the yaw rate is invalid, the CCM disables the adaptive cruise control. The message center displays the message COLLISION WARNING MALFUNCTION and/or ADAPTIVE CRUISE MALFUNCTION. The CCM monitors the environment in front of the vehicle while active. If the radar beam is obstructed by a buildup of snow, ice, rain or other debris, or the vehicle is driven in a desert environment with no other traffic for extended periods of time, the sensor will trigger an ADAPTIVE CRUISE NOT AVAILABLE SENSOR BLOCKED SEE MANUAL message and will disable the adaptive cruise control. The adaptive cruise control will resume once the obstruction is cleared and the radar is able to detect targets, or upon a key cycle. If aftermarket equipment, such as a snow plow, is installed on the front of the vehicle, obstructing the radar, the adaptive cruise control may function erratically. The adaptive cruise control will need to be disengaged using the menu option, and the operator will only have non-adaptive cruise control functionality. The ABS module estimates brake temperature by monitoring applied brake pressure over a period of time and sends a message to the CCM when the estimated temperature is above a given threshold. An alarm sounds and the adaptive cruise control system is deactivated until the estimated brake temperature returns to cooler operating conditions. This condition can happen in a hilly or mountainous driving terrain. Cruise Control Indicator The adaptive cruise control indicator located in the IPC illuminates in gray and the previous gap setting and SET graphic is displayed indicating the system is in standby mode. This notifies the driver the system is ready and the vehicle can be accelerated to the desired speed. When the vehicle reaches the desired speed and the SET+ is pressed, the adaptive cruise control indicator illuminates in green.