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Home >> Mazda >> 1984 >> B2000 Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> EGR System >> Component Testing >> Engine Speed Switch >> California Models
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California Models

  1. Warm engine to normal operating temperature. Insert voltmeter test leads into EGR solenoid valve electrical connector with positive lead touching Black/White wire connector, negative lead touching Brown/White wire connector.
  2. Increase engine speed to 1500 RPM, then slowly decrease engine speed. Current should flow to circuit at 1000-1100 RPM.
  3. Slowly increase engine speed and record speed at which current stops flowing to circuit. The difference between recorded engine speeds should be 50-120 RPM. If not, replace engine speed switch.
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