CAN interface

The DSC3 control unit is linked via the CAN bus to the DME, EML and AGS control units. The steering angle sensor is also connected to this bus.

These control units permanently exchange the most diverse data in the form of telegrams via the CAN bus:

• Engine torque increase for engine drag torque control (MSR)
  
• Engine torque reduction for ASC and DSC control
  
• Torque value preset by driver and
  
• feedback of current engine torque.
  

The AGS control unit signals the currently engaged gear (gear ratio) to the DSC3 control unit for the purpose of calculating the drive torques.

In this way, the DSC3 detects low frictional values and prevents downshifts in order to avoid annoying reciprocating gearshifts.

When driving off with low frictional values, the DSC3 control unit instructs the transmission management system via the CAN bus to engage 2nd gear at an earlier stage.