Corolla 2006-2007

Crankshaft Position Sensor

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Operation



Specific to:

Toyota Corolla 2006-2008

The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a pickup coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and a magnet. The sensor plate rotates and, as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing are controlled

Removal & Installation



Specific to:

Toyota Corolla 2006-2008

  1. Remove crankshaft position sensor retaining bolt.
  2.  
  3. Disconnect crankshaft position sensor connector.
  4.  
  5. Remove sensor.
  6.  

To install:

  1. Reverse removal procedure.
  2.  

Testing



Specific to:

Toyota Corolla 2006-2008

  1. Possible causes:

    Click image to see an enlarged view

    Fig. Possible causes chart

  2.  
  3. Use wiring diagrams to test resistance in sensor.
  4.  
  5. If sensor is not within standard specifications, replace sensor.

    Cold: 1,630 to 2,740 ohms
     
    Hot: 2,065 to 3,225 ohms

    Click image to see an enlarged view

    Fig. Crankshaft position sensor pinout

     

  6.  
  7. Alternative testing: Inspection using an oscilloscope
  8.  
  9. Reference: G2+ stands for the Camshaft Position (CMP) sensor signal, and NE+ stands for the CKP sensor signal.

    Click image to see an enlarged view

    Fig. Oscilloscope wave form



    Click image to see an enlarged view

    Fig. Oscilloscope wave form pinout

  10.  

 
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