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HOMESERVICE MANUALSMAZDA20103 MAZDASPEED, 2.3 4REPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE CONTROL SYSTEM [L3 WITH TC]CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATIONINSTALLATION
2010 Mazda 3 Mazdaspeed, 2.3 4

Crankshaft Position (CKP) Sensor Removal/Installation: Installation

2010 Mazda 3 Mazdaspeed, 2.3 4SECTION Installation
CAUTION:
  • When foreign material, such as an iron chips, gets on the CKP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect engine control. Be sure there is no foreign material on the CKP sensor when replacing.
  1. Perform the following procedure so that piston No. 1 is at the top dead center.
    1. Rotate the crankshaft in the direction of the engine rotation and remove the cylinder block lower blind plug when the No. 1 cylinder is at the point prior to top dead center (TDC) of compression, then install the SST.
    2. Rotate the crankshaft in the direction of the engine rotation so that the No. 1 piston is at TDC of the compression stroke. (Until the crank weight contacts SST and stops.)
      Fig 1: Installing SST
      G04859836Courtesy of MAZDA MOTORS CORP.
  2. Using a straight edge, draw a straight line directly in the center of the twentieth tooth of the crankshaft pulley pulse wheel (counting counterclockwise from the empty space).
    CAUTION:
    • If the line is not accurately drawn, ignition timing, fuel injection and other engine control systems will be adversely effected. Draw the straight line carefully using a straight edge.
  3. Align the center line of the crankshaft position sensor and the line drawn in Step 2, then install the sensor.
    Fig 2: Identifying CKP Sensor
    G04859837Courtesy of MAZDA MOTORS CORP.
  4. Install the CKP sensor fitting bolts.
    Fig 3: CKP Sensor Fitting Bolts With Torque Specifications
    G06730888Courtesy of MAZDA MOTORS CORP.
  5. Remove the SST  then install the cylinder block lower blind plug.
    Fig 4: Cylinder Block Lower Blind Plug With Torque Specifications
    G06730945Courtesy of MAZDA MOTORS CORP.
RENDER: 1.0x

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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.