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Home >> Mini >> 2002 >> Cooper Base, Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> ECVT - Overview >> Mini ECVT >> Automatic Transmission (MINI COOPER Only) >> System Components >> Group Three >> Ratio Control Motor

Ratio Control Motor

The Ratio Control Motor is housed inside the transmission, adjacent to the oil cooler pipe connections. The motor and solenoids are connected to the main harness via a circular connector. The motor is operational in all transmission modes and controls the hydraulic control unit to adjust the primary pulley to the appropriate position.

Fig 1: Ratio Control Motor
G04724783Courtesy of BMW OF NORTH AMERICA, INC.

The motor which controls the transmission ratio is a linear actuator and a bi-polar stepper motor.