saab Workshop Repair Guides

Saab Workshop Service and Repair Manuals

Air Door Actuator / Motor, HVAC|Service and Repair > < Motor, Air Distribution, Defroster (714)|Page 11960
Page 22
background image

When the stepping motor is stationary, two windings are continuously grounded in order to lock the motor. The stepping motor does not need to be
reconnected to the control module (position sensor). By sending a specific number of ground pulses, the ACC unit knows how far the air distribution
damper has moved.

Air Door Actuator / Motor, HVAC|Service and Repair > < Motor, Air Distribution, Defroster (714)|Page 11960