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Engine Speed Switch (CALIF. B2000 Only)

NOTE: Testing of Mazda 626 engine speed switch (manual transmission) is explained in "Mazda Piston Engine Air Pump Air Injection" article in this section.
  1. Warm engine to normal operating temperature. Connect voltmeter to electrical connectors as shown in Fig 1. Increase engine speed to 1500 RPM, then slowly decrease engine speed. Record speed at which current flows to circuit.
  2. 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.
Fig 1: Testing Calif. B2000 Engine Speed Switch
G09313941Courtesy of MAZDA MOTORS CORP.
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