2004 Mazda 3 i, AutomaticFACTORY OEM SERVICE PROCEDURE

Crankshaft Position (CKP) Sensor Removal/Installation: Installation

CAUTION:
  • When replacing the CKP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, the sensor output signal will malfunction resulting from fluctuation in magnetic flux and cause a deterioration in engine control.
  • Do not install the CKP sensor using any method except for the following, or do not change the installation position. It might cause a deterioration in engine control for ignition timing and fuel injection.
  1. Perform the following procedure so that cylinder No. 1 is at TDC.
    1. Remove the cylinder block lower blind plug and install the SST. 
    2. Rotate the crankshaft pulley clockwise until the crank weight contacts the SST  so that cylinder No. 1 is at TDC.
  2. Mark the center line on the pulse wheel teeth of the crankshaft pulley (9th tooth counting counterclockwise from the empty space) using a ruler.
    CAUTION:
    • An inaccurately placed center line will cause improper installation resulting in a deterioration in engine control for ignition timing and fuel injection. Mark the center line carefully.
      Fig 1: Aligning Crankshaft Position Sensor & Pulse Wheel Center Line
      G00972609Courtesy of MAZDA MOTORS CORP.
  3. Install the CKP sensor where the center line marked in Step  2 and the CKP sensor center line are aligned.
  4. Tighten the CKP sensor installation bolt.
    1. Tightening torque 5.5-7.5 N.m {56-76 kgf.cm, 49-66 in.lbf} 
  5. Remove the SST  and install the blind plug.
    1. Tightening torque 18-22 N.m {1.9-2.2 kgf.m, 14-16 ft.lbf} 
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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