Express 3/4 Ton Van V8-4.8L VIN V (2003)
Air Door Actuator / Motor: Description and Operation
AIR DELIVERY
AUXILIARY MODE ACTUATOR
The auxiliary 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
assembly 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.
AIR TEMPERATURE
AIR TEMPERATURE ACTUATOR
The air temperature actuator and auxiliary air temperature actuator are 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 assembly 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.
