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Home › Mazda › 1995 › B3000 Base, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls - Basic Testing › Ignition Checks › B2300, B3000 & B4000 › Check Crankshaft Position (CKP) Sensor

Check Crankshaft Position (CKP) Sensor

  1. Turn key off. Connect 104-pin Breakout Box (49 UN01 130) to PCM and vehicle harness. Measure voltage between pins No. 21 and 22 of breakout box while cranking engine. If voltage is more than 0.4 volt, CKP sensor is okay. If voltage is less than 0.4 volt, go to next step.
  2. Turn ignition off. Disconnect PCM connector from breakout box. Measure voltage between pins No. 21 and 22 of breakout box while cranking engine. If voltage is more than 0.4 volt, replace PCM. If voltage is less than 0.4 volt, go to next step.
  3. Turn key off. Measure resistance between pins No. 21 and 22 of breakout box. If resistance is not 300-800 ohms, check wiring harness between CKP sensor and PCM. If wiring is okay, replace CKP sensor. If resistance is 300-800 ohms, go to next step.
  4. Check trigger wheel (crankshaft pulley) and CKP sensor for damage. If CKP sensor and trigger wheel are okay, replace CKP sensor.
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