Module, Adaptive Cruise Control: Description: Description
The Adaptive Cruise Control (ACC) module lens could be obstructed by snow/ice, dirt, mud, or other elements. A message will appear on the dash to clean the radar. The Radar is equipped with a heating element that can melt snow/ice. Otherwise, the radar must be cleaned manually.
The ACC module is a stand-alone forward facing radar module. It is mounted to the vehicle structure, outside the cabin, in a manner allowing for an unobstructed view. The ACC module can operate as a stand-alone Electronic Control Unit (ECU) or can also be used in conjunction with additional forward ranging and object detection sensors in order to provide many driver assistance systems features.
The ACC module is located on a bracket secured to the bumper beam at vehicle centerline. The stamped steel ACC module mounting bracket is secured by two screws to the front bumper beam
The ACC module and radar sensor communicates with other vehicle ECUs via both public and private bus networks to provide the following features sets:
- Standard Cruise Control
- Adaptive Cruise Control (ACC)
- Enhanced Adaptive Cruise Control (ACC+)
- Adaptive Cruise Control with Stop and Go (ACC+)
- Forward Collision Warning (FCW)
- FCW with Collision Mitigation (FCW+)
- Full Speed Range Forward Collision Mitigation (FSRFCW+)
- Advanced Brake Assist (ABA)
One fixed ball stud (4) and two adjustable ball studs (3) secure the module housing through a snap fit into three molded plastic ball socket clips installed in the mounting bracket. The module pivots on the fixed ball stud while the upper right adjustable ball stud allows the module to be vertically aligned after installation using an ACC vertical alignment special tool and a 3.5 millimeter hex nut driver special tool. Horizontal alignment is performed electronically using a diagnostic scan tool during a ten minute drive at the required speed range following completion of the vertical alignment. Any necessary adjustments indicated as a result of the drive will need to be completed.
The ACC module electronic circuitry is sealed and protected within a die cast aluminum housing. A molded plastic cover and a lens or radar dome (5) faces forward through an opening in the center of the front fascia lower. A molded plastic module bezel or mirror cover with a center clearance hole for the module lens snaps over the module and conceals a small square mirror in one corner of the module cover that is used for calibration purposes during the module manufacturing process.
The ACC module includes an applied connector receptacle (2) that is sealed and secured to the module housing with screws and faces downward when installed on the mounting bracket. The ACC module is connected to the vehicle electrical system through a single dedicated takeout and connector of the Front End Module (FEM) wire harness.
The adjustable ball studs and the ACC module cannot be repaired. If the clips are damaged the entire assembly (bracket and module) must be replaced. Same applies for the module itself. If the module is damaged, the entire assembly must be replaced.