Celica Supra L6-2759cc 5M Ser (1982)
Air Injection Control Valve: Testing and Inspection
Air Control Valve
1981 22R Engine
1. Disconnect air hose from check valve and air by-pass hose from air cleaner.
2. Disconnect vacuum hose between air switching valve and vacuum pipe at valve, and disconnect vacuum hoses from air control valve, then plug
hose ends.
Fig.77 - Testing Air Control Valve
3. With engine idling, apply vacuum directly to air control valve chamber "B" and air switching valve chamber "A", Fig. 77. Compressed air should
come out of bypass hose at idle.
Fig.78 - Testing Air Control Valve
4. Release vacuum from air control valve chamber "B" and apply vacuum directly to chamber "A" of air switching and air control valves, Fig. 78.
Compressed air should come out of air hose to check valve at idle.
Fig.79 -testing Air Control Valve
5. Release vacuum from air switching valve chamber "A" and apply vacuum directly to air control valve chamber "A", Fig. 79. Compressed air
should come out of air bypass hose at idle.
6. Connect suitable air pump tester to air hose to check valve.
7. Apply vacuum directly to chamber "A" of air switching and air control valves.
8. Close off tester orifice, then gradually in- crease engine speed and measure relief valve opening pressure. Opening pressure should be 5 to 6.4 psi.
9. Remove tester and reconnect air and vacuum hoses to proper locations.
1981-82 3A-C Engine
