Hyundai Car 1999-05

Camshaft Position Sensor

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Description & Operation



The camshaft position sensor senses the TDC point of the number one cylinder, on its compression stroke. Its signal is relayed to the ECM to be used to determine the sequence of fuel injection.

The camshaft position sensor senses the TDC point of the number one cylinder, on its compression stroke. Its signal is relayed to the ECM to be used to determine the sequence of fuel injection.

The camshaft position sensor senses the TDC point of the number one cylinder, on its compression stroke. Its signal is relayed to the ECM to be used to determine the sequence of fuel injection.

The camshaft position sensor senses the TDC point of the number one cylinder, on its compression stroke. Its signal is relayed to the ECM to be used to determine the sequence of fuel injection.

The camshaft position sensor senses the TDC point of the number one cylinder, on its compression stroke. Its signal is relayed to the ECM to be used to determine the sequence of fuel injection.

The camshaft position sensor senses the TDC point of the number one cylinder, on its compression stroke. Its signal is relayed to the PCM to be used to determine the sequence of fuel injection.

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.
  6.  
  7. Remove the sensor.
  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 bolt that retains the sensor.
  6.  
  7. Remove the sensor.
  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 bolt that retains the sensor.
  6.  
  7. Remove the sensor.
  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 bolt that retains the sensor.
  6.  
  7. Remove the sensor.
  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 bolt that retains the sensor.
  6.  
  7. Remove the sensor.
  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 bolt that retains the sensor.
  6.  
  7. Remove the sensor.
  8.  

To install:

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

Testing



  1. Using a voltmeter measure the sensor output voltage.
  2.  
  3. At idle the specification should be 0-5 volts. At 3000 RPM the specification should be 0-5 volts.
  4.  
  5. If abnormality is found, replace the sensor.
  6.  

  1. Using a voltmeter measure the sensor output voltage.
  2.  
  3. At idle the specification should be 0-5 volts. At 3000 rpm the specification should be 0-5 volts.
  4.  
  5. If abnormality is found, replace the sensor.
  6.  

  1. Using a voltmeter measure the sensor output voltage.
  2.  
  3. At idle the specification should be 0-5 volts. At 3000 rpm the specification should be 0-5 volts.
  4.  
  5. If abnormality is found, replace the sensor.
  6.  

  1. Be sure that the CMPS 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.  

2.0L Engine
  1. Using a voltmeter measure the sensor output voltage.
  2.  
  3. At idle (800 rpm) the specification should be 0-5 volts. At 3000 rpm the specification should be 0-5 volts.
  4.  
  5. If abnormality is found, replace the sensor.
  6.  

  1. Be sure that the CMPS 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 crankshaft 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 0.07 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. Connect the Hi-Scan tool to the data link connector.
  2.  
  3. Start the engine. Allow the engine to reach operating temperature.
  4.  
  5. Monitor the CMPS signal. It should continuously fluctuate between 0-5 volts.
  6.  
  7. If abnormality is found, replace the sensor
  8.  

  1. Be sure that the CMPS 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. Connect the Hi-Scan tool to the data link connector.
  2.  
  3. Start the engine. Allow the engine to reach operating temperature.
  4.  
  5. Monitor the CMPS signal. It should continuously fluctuate between 0-5 volts.
  6.  
  7. If abnormality is found, replace the sensor.
  8.  

2.7L Engine
  1. Connect the Hi-Scan tool to the data link connector.
  2.  
  3. Start the engine. Allow the engine to reach operating temperature.
  4.  
  5. Monitor the CMPS signal. It should continuously fluctuate between 0-5 volts.
  6.  
  7. If abnormality is found, replace the sensor.
  8.  

  1. Be sure that the CMPS 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 crankshaft 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 0.07 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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