Hyundai Car 1999-05

Crankshaft Position Sensor

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Operation



The crankshaft position sensor consists of a magnet and coil. The voltage signal from the sensor is relayed to the ECM to indicate engine RPM and the position of the crankshaft.

The crankshaft position sensor consists of a magnet and coil. The voltage signal from the sensor is relayed to the ECM to indicate engine rpm and the position of the crankshaft.

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 58 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 58 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 crankshaft position sensor consists of a magnet and coil. The voltage signal from the sensor is relayed to the ECM to indicate engine rpm and the position of the crankshaft.

The crankshaft position sensor consists of a magnet and coil. The voltage signal from the sensor is relayed to the ECM to indicate engine rpm and the position of the crankshaft.

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 58 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 58 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 crankshaft position sensor consists of a magnet and coil. The voltage signal from the sensor is relayed to the ECM to indicate engine rpm and the position of the crankshaft.

The crankshaft position sensor is a Hall Effect type sensor that senses the crank angle of each cylinder and converts it into a pulse signal. Based on the input signal, the PCM computes the engine speed and controls the fuel injection timing and ignition timing.

Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the connector from the sensor.
  4.  
  5. Remove the bolt that retains the sensor in place.
  6.  
  7. Remove the sensor from its mounting.
  8.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Clearance between the sensor and the sensor wheel should be 0.020-0.059 inch.
  4.  

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the connector from the sensor.
  4.  
  5. Remove the bolt that retains the sensor in place.
  6.  
  7. Remove the sensor from its mounting.
  8.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Clearance between the sensor and the sensor wheel should be 0.020-0.059 inch.
  4.  

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the connector from the sensor.
  4.  
  5. Remove the bolt that retains the sensor in place.
  6.  
  7. Remove the sensor from its mounting.
  8.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Clearance between the sensor and the sensor wheel should be 0.020-0.059 inch.
  4.  

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the connector from the sensor.
  4.  
  5. Remove the bolt that retains the sensor in place.
  6.  
  7. Remove the sensor from its mounting.
  8.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Clearance between the sensor and the sensor wheel should be 0.020-0.059 inch.
  4.  

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the connector from the sensor.
  4.  
  5. Remove the bolt that retains the sensor in place.
  6.  
  7. Remove the sensor from its mounting.
  8.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the connector from the sensor.
  4.  
  5. Remove the retaining bolts.
  6.  
  7. Remove the sensor from its mounting.
  8.  

To install:

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Clearance between the sensor and the sensor wheel should be 0.020-0.059 inch.
  4.  

Testing



  1. Disconnect the sensor electrical connector. Connect an ohmmeter.
  2.  
  3. On 1997-2004 vehicles, measure the resistance between terminals 2 and 3, on the crankshaft position side of the connector. Specification should be 0.486-0.594 kohm at 68 degrees F.
  4.  
  5. On 2005 vehicles, measure the resistance between terminals 1 and 2, on the crankshaft position side of the connector. Specification should be 0.486-0.594 kohm at 68 degrees F.
  6.  
  7. If measured value is not within specification, replace the sensor.
  8.  

  1. Disconnect the sensor electrical connector. Connect an ohmmeter.
  2.  
  3. Measure the resistance between terminals 2 and 3, on the crankshaft position side of the connector. Specification should be 0.486-0.594 kohm at 68 degrees F.
  4.  
  5. If measured value is not within specification, replace the sensor.
  6.  

  1. Be sure that the CKPS and PCM connectors are connected.
  2.  
  3. Set up an oscilloscope as follows: Channel A (+): terminal 2 of the CKPS, (-): ground. Channel B (+): terminal 2 of the CMPS, (-): ground.
  4.  
  5. Start the engine and check for signal waveform (whether synchronize with camshaft sensor or not and tooth is missing).
  6.  
  7. Readings are as follows: The square wave signal should be smooth and without distortion.
  8.  
  9. Readings are as follows: The CMPS falling (rising) edge should coincide with 3-5 tooth of the CKP from one longer signal (missing tooth).
  10.  
  11. If the waveform signal is normal, check for poor connection between the PCM and the components.
  12.  
  13. If the waveform signal is not normal, remove the sensor and calculate the air gap between the sensor and the flywheel/torque converter.
  14.  
  15. Air gap is 0.012-0.067 inch. Measure from the distance of the housing to teeth on the flywheel/torque converter (measurement -A-) and from the mounting surface on the sensor to sensor tip (measurement -B-), then subtract -B- from -A-.
  16.  
  17. Check the sensor for contamination, deterioration or damage.
  18.  
  19. Substitute the sensor with a known good component, check for proper operation. If problem corrected replace the sensor.
  20.  

  1. Turn the ignition ON.
  2.  
  3. Disconnect the sensor electrical connector. Be sure the PCM connector is connected.
  4.  
  5. Measure the voltage between ground and terminal 2 of the sensor harness connector.
  6.  
  7. Specification should be 5 volts.
  8.  
  9. If so repair or replace the sensor.
  10.  

  1. Be sure that the CKPS and PCM connectors are connected.
  2.  
  3. Engine ON and monitor the signal waveform of the sensor on the scan tool. Check whether the waveform is synchronized with the camshaft position sensor or not.
  4.  
  5. If the waveform signal is normal, check the PCM.
  6.  
  7. If the waveform signal is not normal, substitute with a known good CKPS sensor and check for proper operation. If the problem is corrected replace the CMPS.
  8.  

2.0L Engine
  1. Disconnect the sensor electrical connector. Connect an ohmmeter
  2.  
  3. Measure the resistance between terminals 2 and 3, on the crankshaft position side of the connector. Specification should be 0.486-0.594 kohm at 68 degrees F.
  4.  
  5. If measured value is not within specification, replace the sensor.
  6.  

  1. Be sure that the CKPS and PCM connectors are connected.
  2.  
  3. Set up an oscilloscope as follows: Channel A (+): terminal 2 of the CKPS, (-): ground. Channel B (+): terminal 2 of the CMPS, (-): ground.
  4.  
  5. Start the engine and check for signal waveform (whether synchronize with camshaft sensor or not and tooth is missing).
  6.  
  7. Readings are as follows: The square wave signal should be smooth and without distortion.
  8.  
  9. Readings are as follows: The CMPS falling (rising) edge should coincide with 3-5 tooth of the CKP from one longer signal (missing tooth).
  10.  
  11. If the waveform signal is normal, check for poor connection between the PCM and the components.
  12.  
  13. If the waveform signal is not normal, remove the sensor and calculate the air gap between the sensor and the flywheel/torque converter.
  14.  
  15. Air gap is 0.012-0.067 inch. Measure from the distance of the housing to teeth on the flywheel/torque converter (measurement -A-) and from the mounting surface on the sensor to sensor tip (measurement -B-), then subtract -B- from -A-.
  16.  
  17. Check the sensor for contamination, deterioration or damage.
  18.  
  19. Substitute the sensor with a known good component, check for proper operation. If problem corrected replace the sensor.
  20.  

2.4L Engine
  1. Disconnect the sensor electrical connector. Connect an ohmmeter.
  2.  
  3. Measure the resistance between terminals 2 and 3, on the crankshaft position side of the connector. Specification should be 0.486-0.594 kohm at 68 degrees F.
  4.  
  5. If measured value is not within specification, replace the sensor.
  6.  

  1. Be sure that the CKPS and PCM connectors are connected.
  2.  
  3. Engine ON and monitor the signal waveform of the sensor on the scan tool. Check whether the waveform is synchronized with the crankshaft position sensor or not.
  4.  
  5. If the waveform signal is normal, substitute with a known good PCM and check for proper operation. If the problem is corrected replace the PCM.
  6.  
  7. If the waveform signal is not normal, substitute with a known good CMPS sensor and check for proper operation. If the problem is corrected replace the CMPS.
  8.  

2.5L Engines
  1. Disconnect the sensor electrical connector. Connect an ohmmeter.
  2.  
  3. Measure the resistance between terminals 2 and 3, on the crankshaft position side of the connector. Specification should be 0.486-0.594 kohm at 68 degrees F.
  4.  
  5. If measured value is not within specification, replace the sensor.
  6.  

2.7L Engine
  1. To check the signal voltage, turn the ignition switch to the OFF position.
  2.  
  3. Disconnect the ECM connector.
  4.  
  5. Measure the resistance between terminal 2 of the sensor harness connector and terminal 8 of the ECM harness connector (C133-3).
  6.  
  7. Measure the resistance between terminal 3 of the sensor harness connector and terminal 21 of the ECM harness connector (C133-3).
  8.  
  9. Specification should be below 1 ohm.
  10.  
  11. If not, replace the sensor.
  12.  

  1. Be sure that the CKPS and PCM connectors are connected.
  2.  
  3. Set up an oscilloscope as follows: Channel A (+): terminal 2 of the CKPS, (-): ground. Channel B (+): terminal 2 of the CMPS, (-): ground.
  4.  
  5. Start the engine and check for signal waveform (whether synchronize with camshaft sensor or not and tooth is missing).
  6.  
  7. Readings are as follows: The square wave signal should be smooth and without distortion.
  8.  
  9. Readings are as follows: The CMPS falling (rising) edge should coincide with 3-5 tooth of the CKP from one longer signal (missing tooth).
  10.  
  11. If the waveform signal is normal, check for poor connection between the PCM and the components.
  12.  
  13. If the waveform signal is not normal, remove the sensor and calculate the air gap between the sensor and the flywheel/torque converter.
  14.  
  15. Air gap is 0.012-0.067 inch. Measure from the distance of the housing to teeth on the flywheel/torque converter (measurement -A-) and from the mounting surface on the sensor to sensor tip (measurement -B-), then subtract -B- from -A-.
  16.  
  17. Check the sensor for contamination, deterioration or damage.
  18.  
  19. Substitute the sensor with a known good component, check for proper operation. If problem corrected replace the sensor.
  20.  

 
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