Grand Prix V6-3.1L VIN J (2000)
Vacuum Solenoid Valve HVAC: Description and Operation
HVAC Systems - Automatic
The heater-A/C control microprocessor releases electrical signals. The vacuum solenoid module converts electrical signals into vacuum commands. The
vacuum commands position the following valves in the air distributor:
^
Mode valve
^
A/C-defrost valve
^
Outside air valves
Vacuum is constantly applied to the module. The module distributes the vacuum to five solenoid-controlled valves on the module. The following actions
occur when the heater-A/C control signals the module to change an air distributor valve position:
^
The solenoid that is associated with the valve energizes.
^
Vacuum is applied to the appropriate actuator.
