Adaptive Cruise Control (Acc)

WARNING: This page is about a different car, the 2020 Chrysler 300 and 2019 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

The adaptive electronic speed control system includes the following major components, which are described in further detail elsewhere in this service information:

ACC Module - An ACC module is located on a bracket secured near the right outboard end of the front bumper support member of the Front End Module (FEM) behind the front fascia. Refer to MODULE, ADAPTIVE CRUISE CONTROL (ACC), DESCRIPTION .
Antilock Brake System (ABS) Module - An ABS module is located below the antilock brake Hydraulic Control Unit (HCU) in the engine compartment. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), DESCRIPTION .
Brake Pedal Position Sensor - The brake pedal position sensor is located on the brake pedal support bracket under the driver side of the instrument panel. Refer to SENSOR, STOP LAMP, DESCRIPTION .
Instrument Panel Cluster (IPC) - An indicator located in the IPC displays "CRUISE" to inform the vehicle operator when the speed control system is turned ON. Refer to DESCRIPTION .
Electronic Vehicle Information Center (EVIC) - The EVIC is located in the Integrated Center Stack (ICS) and provides an interface to the vehicle operator for setting the adaptive speed control customer preferences as well as a display of the ACC and Forward Collision Warning (FCW) system status messages. Refer to CENTER, ELECTRONIC VEHICLE INFORMATION, DESCRIPTION .
Powertrain Control Module (PCM) - The PCM is located in the engine compartment. The PCM contains the software and hardware that monitors all of the speed control system inputs and controls all of the speed control system outputs. Refer to MODULE, POWERTRAIN CONTROL (PCM), DESCRIPTION .
Speed Control Switches - A speed control switch pod containing eight momentary switch push buttons is located in the right horizontal spoke of the steering wheel.
Steering Column Control Module (SCCM) - A microcontroller is integral to the SCCM located at the top of the steering column just below the steering wheel. Refer to MODULE, STEERING COLUMN CONTROL (SCCM), DESCRIPTION .
Wheel Speed Sensors - A wheel speed sensor is located on the knuckle of each front and rear wheel. Refer to SENSOR, WHEEL SPEED, FRONT, DESCRIPTION .

The ACC system, the ABS, the IPC, the EVIC, the PCM and the SCCM each contain a microcontroller and programming that allow them to communicate with each other using the Controller Area Network (CAN) data bus. This method of communication is used by the ACC system to provide inputs to the ABS module, the EVIC and the PCM, is used by the ABS module to provide inputs to the PCM, is used by the SCCM to relay the status of the speed control switches to the PCM and is used by the PCM for control of the indicators in the IPC and the indications in the EVIC. Refer to COMMUNICATION, DESCRIPTION .