Crankshaft Position Sensor

Crankshaft Position (CKP) sensor is located on front of engine, near crankshaft pulley. Disconnect CKP sensor connector. Using ohmmeter, measure resistance between terminals "A" and "B" at CKP sensor. See Fig 1 . Resistance should be as specified. See CRANKSHAFT POSITION SENSOR RESISTANCE SPECIFICATIONS table.

Fig 1: Checking Crankshaft Position Sensor Resistance (Typical)
Courtesy of MAZDA MOTORS CORP.
If resistance is not as specified, replace CKP sensor. If resistance is as specified, measure CKP sensor air gap. Air gap should be .020-.060" (.5-1.5 mm). On Miata, adjust air gap to specification if necessary. On all models, if air gap is not as specified, replace CKP sensor or crankshaft pulley. On MPV, air gap specification is not available.

CRANKSHAFT POSITION SENSOR RESISTANCE SPECIFICATIONS

Application

⁽¹⁾ Ohms

Miata

⁽²⁾

Millenia

2.3L

950-1250

2.5L

520-580

MPV

315-385

Protege, Protege5 & 626

550

⁽¹⁾	With sensor temperature at 68°F (20°C).

⁽²⁾	Information not available from manufacturer.