TESTING

See Figures 1 and 2

Used on 4A-F engines.

  1. Check for a short circuit. Using an ohmmeter, check that there is no continuity between the positive (+) terminal and the EBCV body. If there is continuity, replace the EBCV.
    2.  



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Fig. Fig. 1: Connect an ohmmeter as shown to test for a short circuit in the EBCV

  1. Check for an open circuit. Using an ohmmeter, measure the resistance between the two terminals. The resistance should be between 11-13 ohms at 68°F (20°C). If the resistance is not within specification, replace the EBCV. Remember that the resistance will vary slightly with temperature. Resistance (ohms) will decrease as the temperature drops.
    2.  



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Fig. Fig. 2: Measure the resistance between the terminals of the EBCV

REMOVAL & INSTALLATION

Replacing the EBCV simply requires labeling and unplugging the vacuum and/or electrical connections, then unbolting the valve. Inspect the vacuum hose over its entire length for any signs of cracking or splitting. The slightest leak can cause improper operation.