Forenza 2007

Crankshaft Position Sensor

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Operation



Specific to:

Suzuki Forenza 2007-2008

Suzuki Reno 2007-2008

This direct ignition system uses a magnetic crankshaft position sensor. This sensor protrudes through its mount to within approximately 0.05 inches. (1.3 mm) of the crankshaft reluctor. The reluctor is a special wheel attached to the crankshaft or crankshaft pulley with 58 slots machined into it, 57 of which are equally spaced in 6° intervals. The last slot is wider and serves to generate a -sync pulse.- As the crankshaft rotates, the slots in the reluctor change the magnetic field of the sensor, creating an induced voltage pulse. The longer pulse of the 58th slot identifies a specific orientation of the crankshaft and allows the Engine Control Module (ECM) to determine the crankshaft orientation at all times. The ECM uses this information to generate timed ignition and injection pulses that it sends to the ignition coils and to the fuel injectors.

Removal & Installation



Specific to:

Suzuki Forenza 2007-2008

Suzuki Reno 2007-2008

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the power steering pump.
  4.  
  5. Remove the A/C compressor.
  6.  
  7. Remove the rear A/C compressor mounting bracket bolts and the rear A/C compressor mounting bracket.

    Click image to see an enlarged view

    Fig. Removal of the A/C bracket to access the CKP sensor

  8.  
  9. Remove the accessory mounting bracket by removing the bolts.
  10.  
  11. Disconnect the Crankshaft Position (CKP) sensor connector.
  12.  
  13. Remove the CKP sensor retaining bolt.
  14.  
  15. Gently rotate and remove the CKP sensor from the engine block.

    Click image to see an enlarged view

    Fig. Removal of the CKP sensor

  16.  

To install:

  1. Insert the CKP sensor into the engine block.
  2.  
  3. Install the CKP sensor retaining bolt.
  4.  
  5. Tighten the crankshaft position sensor retaining bolt to 71inch lbs. (8 Nm).
  6.  
  7. Connect the CKP sensor connector.

    Click image to see an enlarged view

    Fig. Removal of the A/C bracket -to access the CKP

  8.  
  9. Install the accessory mounting bracket with the bolts.
  10.  
  11. Tighten the accessory mounting bracket bolts to 27 ft. lbs. (37 Nm).
  12.  
  13. Install the rear A/C mounting bracket.
  14.  
  15. Tighten the rear A/C mounting bracket bolts to 26 ft. lbs. (35 Nm).
  16.  
  17. Install the A/C compressor.
  18.  
  19. Install the power steering pump.
  20.  
  21. Connect the negative battery cable.
  22.  

Testing



Specific to:

Suzuki Forenza 2007-2008

Suzuki Reno 2007-2008

  1. Using a voltmeter, back probe the ECM connector terminal E36 and E37.
  2.  
  3. Observe the voltage while cranking the engine.
  4.  
  5. Voltage should be between 1.3-1.6volts.
  6.  
  7. If voltage is out of range replace Crankshaft Position (CKP) sensor.
  8.  

 
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