Hi,
I do have a vacuum schematic for the emissions control systems. Also, the HVAC actuators are controlled by an engine vacuum.
Pic 1 below is the emissions system schematic and pic 2 is related to the HVAC circuit.
If you are looking for a leak, here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
Let me know if this helps or if you have other questions.
Take care,
Joe
See pics below.
Images (Click to enlarge)
Dec 9, 2022 at 2:39 PM