Clutch calibration and control

A control system (60) including a calibration routine is provided for a vehicle drive line having an automated master friction clutch (14). The control system (60) utilizes engine torque data supplied by a serial communication data link to identify a clutch control parameter value corresponding to an urge-to-move position of the clutch (14). The clutch control parameter value identified by the calibration routine is stored and utilized by the control system (60) to control the engagement position of the automated clutch (14) in an "urge to move" mode of operation. The inventive calibration method can be utilized across multiple vehicle platforms having different engine, clutch and transmission system components.