System Tests: Tercel
- Check BVSV to see that air passes through when coolant is below 122° F (50° C). Warm engine and recheck. Air should not pass through.
- If testing at high altitude position, ignition timing should be 13° BTDC. Disconnect hose at distributor sub-diaphragm and see that timing changes to 5° BTDC. Reconnect hose, then disconnect from black side of check valve. Plug hose end and see that timing does not change for one minute. Disconnect hose from top of HAC and see that air passes freely into carburetor.
- If testing at low altitude, disconnect hose from BVSV to HAC and plug. Timing should be 13° BTDC. Disconnect and plug hose at black side of check valve. Timing should not change for at least one minute. Reconnect hose to HAC, timing should now be 5° BTDC.
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