Vacuum Control Motors
The three vacuum control motors have the following characteristics:
- They are actuated by the ATC solenoid and manifold based on input from the DATC module.
- They position the mode doors to direct system airflow to the vehicle interior as determined by the DATC module settings.
- The air inlet door vacuum control motor is a single-diaphragm actuator with a single vacuum source.
- The airflow mode door vacuum control motors are double-diaphragm actuators with two separate vacuum sources to allow the actuator to fully retract or partially retract.
- When vacuum is applied to both vacuum sources, the actuator will fully retract.
- When vacuum is applied only to the partial stage vacuum source, the actuator will partially retract.