Air Injection Control Valve: Testing and Inspection

Combination Air Bypass/Air Control Valve:

Combination Air Bypass Valve/Air Control Valve Assembly:

Function Check

1. Disconnect hoses from outlets A and B.
2. Disconnect and plug vacuum line to port D.
3. Airflow should be noted coming out of the bypass vents, with engine operating at 1500 rpm.
4. Reconnect vacuum line to port D, and disconnect and plug vacuum line to port S. Engine vacuum is present in the line to vacuum port D.
5. Airflow should be noted coming out of outlet B, (no airflow should be detected at outlet A) with engine operating at 1500 rpm.
6. Apply 27-34 kPa (8-10 in-Hg) vacuum to port S. With engine operating at 1500 rpm, airflow should be noted coming out of outlet A.
7. Some lesser amount of air will flow from outlet A or B, if the valve is the bleed type, and the main discharge will change when vacuum is applied to port S.