System Components

System Components

Dynamic Drive (ARS) consists of the following components:




ARS Control Module: The control module is located on the right side "A" pillar in front of the glovebox and is powered by B+ through a 10 Amp fuse. The control module is activated by a CAN alarm lead from the CAS module when the ignition is switched "ON".




A vehicle authentication process takes place when the system is started. This compares the vehicle identification number from CAS with the vehicle identification number which is encoded in the ARS control module.

After the ignition is switched "ON", the ARS hardware and software is self-checked. All of the outputs (magnetic valves) are checked for short circuits and breaks. When there is a fault, ARS switches the actuators to a safe driving condition. The control module will switch off in the event of undervoltage or overvoltage.


Dynamic Drive (ARS) Component Overview




Inputs: The ARS control module requires dynamic driving input signals to calculate the required activation. The following input signals are monitored and checked for plausibility:

- Lateral acceleration
- PT-CAN Bus
- Front axle ARS circuit pressure
- Rear axle ARS circuit pressure
- Selector position recognition sensor (SSE)
- Fluid level sensor signal

The PT-CAN provides additional information about lateral dynamics:

- Vehicle speed signal (DSC)
- Steering wheel turning angle (Steering Angle Sensor)
- Yaw velocity - Transversal acceleration (Roational Rate Sensor)

These inputs allow the ARS control module to determine the stabilization requirement at the appropriate inertia moments. The reaction time is decreased by using the vehicle speed and steering angle inputs.

Outputs: All of the outputs are check by diagnostics and are short circuit protected. The outputs (and control) include the following:

- Pressure control valves for the front and rear axle ARS
- Directional valve
- Failsafe valve
- 5 V sensor voltage supply

The valves are controlled by pulse width modulation current. The individual coil current requirements are constantly checked for plausibility. The current measurements allows the pressures to be precisely set and electrical monitoring of the hydraulic the shift valves.

The PT-CAN sends a message to the ECM indicating how much engine power is required to drive the tandem hydraulic pump to activate the ARS stabilizer bars.

An "alive" data signal is provided and monitored by other control modules to detect the system status. All signal faults are permanently stored. Output faults include short circuits (B+ and ground) and open circuits.