Module, Active Damping Control (ADCM): Operation

WARNING: This page is about a different car, the 2017 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

The Active Damping Control Module (ADCM) uses the CAN bus to communicate with multiple modules. The ADCM has the following inputs: Vehicle Speed, Steering Angle Sensor (SAS) position, Throttle Position Sensor (TPS), terrain select switch (through communication with the Drive Train Control Module (DTCM)), and three active damping sensors.

There are two operating modes of the ADS, Auto and Sport (referred to as Firm). At each ignition key on cycle, the vehicle defaults to Auto mode. The DTCM communicates the request for the Firm mode to the ADCM when the terrain select switch is placed in either the Track, Sport or Snow positions. When the Firm mode is selected, the suspension has unique handling characteristics.

The Active Damping Control Module (ADCM) controls the suspension and ride for the SRT version of this vehicle by adjusting the rebound and jounce of the shock assemblies using the above information and predetermined matrix's for maximum vehicle control. The shock absorbers are unique to the Active Damping System (ADS). Each shock absorber has a valving unit that is external, but still part of the shock absorber. Inside each valving unit are two solenoids that control the damping valves to alter the ride of the vehicle. The shocks are replaced as an assembly, they cannot be disassembled for repair.

Additionally, there are three active damping sensors, two in the front of the vehicle and one in the rear. These sensors measure the plane of the vehicle.