System Inputs: Abs/ASC/DSC

The EMS2000 receives road speed signals from the ABS/ASC/DSC module for cruise functions (if equipped) and maximum vehicle speed limiting. Road speed signals arrives at the EMS2000 over the CAN BUS.

Requests for torque modification are also received from the ASC/DSC module over the CAN Bus. If either of the driven wheels loose traction the ASC/DSC control module will request a change in the torque output of the engine in order to regain traction. This occurs in either of the following situations:

• The wheels have broken traction due to excess torque being generated by the engine; the ASC Control Unit therefore requests a torque reduction from the engine.
• The wheels have broken traction due to excess engine braking when on low grip surface; the ASC Control Unit requests a torque increase from the engine under these circumstances. This is called the Engine Drag Torque Control (MSR) System.

Once traction has been regained then the brake or torque intervention will be removed allowing the engine to return to its appropriate torque output as determined by other inputs such as driver demand or cruise control. The requests for a torque increase or reduction are received from the ASC Control Unit via the vehicle CAN-bus.