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Home >> Mazda >> 1995 >> MX-5 Miata Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Camshaft Position (CMP) Sensor

Camshaft Position (CMP) Sensor

  1. Disable ignition coils. Remove CMP sensor, leave electrical connector plugged-in. Using analog voltmeter (or oscilloscope), connect negative lead to CMP sensor ground (CMP sensor body or Black/Blue wire). With voltmeter positive lead, backprobe White wire. Turn ignition on and Rotate CMP shaft. Voltmeter should indicate 4 voltage pulses (5 volts) per revolution.
  2. Move positive voltmeter lead to Yellow/Blue wire terminal. Rotate CMP sensor shaft. Voltmeter should indicate 2 voltage pulses (5 volts) per revolution. Replace CMP sensor if necessary.
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