Silhouette FWD V6-3.4L VIN E (2004)
Air Door Actuator / Motor: Description and Operation
AIR DELIVERY
Mode Actuator
The mode actuator is a 3 wire bi-directional electric motor. Ignition 3 voltage, ground and control circuits enable the actuator to operate. The control
circuit uses a 0-12 volt linear-ramped signal to command the actuator movement. The 0 and 12 volt control values represent the opposite limits of the
actuator range of motion. The values in between 0 and 12 volts correspond to the positions between the limits.
When the HVAC control module sets a commanded, or targeted, value, the control signal is set to a value between 0-12 volts. The actuator shaft
rotates until the commanded position is reached. The module will maintain the control value until a new commanded value is needed.
Recirculation Actuator
The recirculation actuator is a 3 wire bi-directional electric motor. Ignition 3 voltage, ground and control circuits enable the actuator to operate. The
control circuit is either grounded or opened during normal operation. If the control circuit is grounded, then the shaft rotates in the opposite direction
than it would if the circuit was opened. The actuator shaft rotates until the limit is reached. If the module needs to reverse the direction of rotation,
then the control circuit's state is reversed. The open circuits are held at ignition 3 voltage from the actuator. The module will maintain the control
circuit's state until a new position is needed.
AIR TEMPERATURE
Air Temperature Actuator
The air temperature actuator is a 3 wire bi-directional electric motor. Ignition 3 voltage, ground and control circuits enable the actuator to operate. The
control circuit uses a 0-12 volt linear-ramped signal to command the actuator movement. The 0 and 12 volt control values represent the opposite
limits of the actuator range of motion. The values in between 0-12 volts correspond to the positions between the limits.
When the HVAC control module sets a commanded, or targeted, value, the control signal is set to a value between 0-12 volts. The actuator shaft
rotates until the commanded position is reached. The module will maintain the control value until a new commanded value is needed.
