CR-V 2007-2008

Knock Sensor

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Operation



Specific to:

Honda CR-V 2007-2008

The Knock Sensor (KS) is attached to the cylinder block and is used to detect engine vibrations caused by pre-ignition or detonation. The KS uses a piezoelectric element to sense the pressure of a vibration. This pressure is converted into a voltage signal and sent to the PCM. The PCM will retard the timing in an attempt to eliminate pre-ignition or detonation.

Removal & Installation



Specific to:

Honda CR-V 2007-2008

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. Disconnect the knock sensor connector (A).
  6.  
  7. Remove the knock sensor (B).
  8.  

To install:

  1. Install the knock sensor (B) and tighten to 23 ft. lbs. (31 Nm).
  2.  
  3. Connect the knock sensor connector (A).

    Click image to see an enlarged view

    Fig. Location of the Knock Sensor (KS)

  4.  

Testing



Specific to:

Honda CR-V 2007-2008

  1. Connect the Honda Diagnostics System (HDS), or equivalent scan tool, to the Data Link Connector (DLC) located under the driver's side of the dashboard.
  2.  
  3. Turn the ignition switch ON .
  4.  
  5. Check the KS SENSOR in the DATA LIST.
  6.  
  7. Start the engine and run at 3,000 RPM.
  8.  
  9. If voltage is not seen, inspect the connectors and wiring harness.
  10.  
  11. If no faults are found, replace the sensor.
  12.  

 
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