CR-V 2007-2008

Crankshaft Position Sensor

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Operation



Specific to:

Honda CR-V 2007-2008

The crankshaft position sensor is a Hall Effect type sensor that generates voltage using a sensor and a target wheel mounted on the crankshaft. There are slots in the target wheel where one is longer than the others. When the slot in the wheel aligns with the sensor, the sensor voltage output is low. When the metal tooth in the wheel aligns the sensor, the sensor voltage is high. During one crankshaft rotation there are many rectangular signals and one longer signal. The PCM calculates engine RPM by using the sensor-s signal and controls the injection duration and ignition timing. Using the signal differences caused by the longer slot, the PCM identifies which cylinder is at TDC.

The CKP sensor detects crankshaft speed and is used by the PCM to determine ignition timing and timing for fuel injection of each cylinder, as well as detecting engine misfire.

Removal & Installation



Specific to:

Honda CR-V 2007-2008

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the CKP sensor connector (A).
  4.  
  5. Remove the CKP sensor (B).
  6.  

To install:

  1. Install the CKP sensor (B) with a new O-ring (C).
  2.  
  3. Tighten the CKP mounting bolt to 104 inch lbs. (12 Nm).
  4.  
  5. Perform the CKP pattern clear/CKP pattern learn procedure.

    Click image to see an enlarged view

    Fig. Crankshaft Position (CKP) sensor location

  6.  

CKP Pattern Clear/CKP Pattern Learn
With Honda Diagnostic System (HDS)

Specific to:

Honda CR-V 2007-2008

  1. Connect the Honda Diagnostic System (HDS) to the Data Link Connector (DLC) located under the driver's side of the dashboard.
  2.  
  3. Turn the ignition switch to ON.
  4.  
  5. Make sure the HDS communicates with the PCM and other vehicle systems. If it does not, go to the DLC circuit troubleshooting.
  6.  
  7. Select CRANK PATTERN in the ADJUSTMENT MENU with the HDS.
  8.  
  9. Select CRANK PATTERN LEARNING with the HDS and follow the screen prompts.
  10.  

Without Honda Diagnostic System (HDS)

Specific to:

Honda CR-V 2007-2008

  1. Start the engine.
  2.  
  3. Hold the engine speed at 3,000 RPM without load (in P or N) until the radiator fan comes on.
  4.  
  5. Test-drive the vehicle on a level road: decelerate (with the throttle fully closed) from an engine speed of 2,500 RPM down to 1,000 RPM with the transaxle in 2 position.
  6.  
  7. Repeat step 3 several times.
  8.  
  9. Turn the ignition switch to LOCK.
  10.  
  11. Turn the ignition switch to ON and wait 30 seconds.
  12.  

Testing



Specific to:

Honda CR-V 2007-2008

  1. Connect an Honda Diagnostic 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 CKP SENSOR in the DATA LIST.
  6.  
  7. If voltage is not modulating in a square wave pattern and within specification, inspect the connectors and wiring harness.
  8.  
  9. If no faults are found in the connectors or wiring harness, replace the sensor.
  10.  

 
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