Automatic Temperature Control (ATC) Solenoid and Manifold

The automatic temperature control (ATC) solenoid and manifold uses 5 internal solenoid-type valves to distribute vacuum to the vacuum control motors and heater control valve based on the dual-zone EATC module settings. Manifold vacuum is always available at the ATC solenoid and manifold from the vacuum reservoir when the engine is running. The 4 vacuum control motors and the heater control valve vacuum lines are each connected to a separate internal solenoid. The dual-zone EATC module will apply voltage to the desired solenoids to open the solenoid to the manifold vacuum supply and complete the vacuum circuit to the desired component.