Vacuum Control System
WARNING: This page is about a different car, the 2001 Pontiac Sunfire, 2001 Chevrolet Cavalier, 2000 Pontiac Sunfire, and 2000 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Use VACUUM DIAGRAMS and IDENTIFYING VACUUM PORTS table for testing. Ensure all vacuum lines are free of leaks and installed correctly before continuing diagnosis.
IDENTIFYING VACUUM PORTS
| Switch position | Port 1 (Yellow) | Port 2 (Blue) | Port 3 (Green) | Port 4 (Orange) | Port 5 (Red) | Port 6 (Purple) |
|---|---|---|---|---|---|---|
| Bi-Level | Vented | Vented | Vacuum | Vented | Vented | Vacuum |
| Face | Vacuum | Vented | Vacuum | Vacuum | Vented | Vacuum |
| Foot | Vented | Vented | Vacuum | Vented | Vacuum | Vacuum |
| Foot/Defog | Vented | Vented | Vented | Vented | Vacuum | Vacuum |
| Defrost | Vacuum | Vacuum | Vented | Vented | Vacuum | Vacuum |