One way of reducing the drive torque during ASC activation is to close the choke. For this purpose, the control unit activates an electric motor which operates the choke with the aid of a cable assembly. The throttle actuator is activated by clocking the positive and negative supply.
The power output stage in the ABS/ASC control unit for operating the throttle actuator is powered by a separate line (terminal 30).
The current position of the choke is detected by a throttle potentiometer and signalled back to the control unit.