Mitsubishi Car 1999-05

Crankshaft Position Sensor

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Operation



The Crankshaft Position (CKP) sensor (also referred to as the crank angle sensor) senses the crank angle (piston position) of each cylinder and converts it into a pulse signal. The PCM receives this signal and then computes the engine speed ad controls the fuel injector timing and ignition timing based on this input.

A 5-volt voltage is applied on the Crankshaft Position (CKP) Sensor output terminal from the ECM/PCM. The sensor generates a pulse signal when the output terminal is opened and grounded.

A 5-volt voltage is applied on the Crankshaft Position (CKP) Sensor output terminal from the ECM/PCM. The sensor generates a pulse signal when the output terminal is opened and grounded.

A 5-volt voltage is applied on the Crankshaft Position (CKP) Sensor output terminal from the ECM/PCM. The sensor generates a pulse signal when the output terminal is opened and grounded.

A 5-volt voltage is applied on the Crankshaft Position (CKP) Sensor output terminal from the ECM/PCM. The sensor generates a pulse signal when the output terminal is opened and grounded.

A 5-volt voltage is applied on the Crankshaft Position (CKP) Sensor output terminal from the ECM/PCM. The sensor generates a pulse signal when the output terminal is opened and grounded.

A 5-volt voltage is applied on the Crankshaft Position (CKP) Sensor output terminal from the ECM/PCM. The sensor generates a pulse signal when the output terminal is opened and grounded.

Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Detach the crankshaft position sensor electrical connector.
  4.  
  5. Unfasten the retaining bolt, then remove the sensor.
  6.  

To install:

  1. Position the sensor and install the retaining bolt.
  2.  
  3. Attach the crankshaft position sensor electrical connector.
  4.  
  5. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Crankshaft Position Sensor removal & installation

  6.  

  1. Disconnect the negative battery cable.
  2.  
  3. Detach the crankshaft position sensor electrical connector.
  4.  
  5. Unfasten the retaining bolt, then remove the sensor.
  6.  

To install:

  1. Position the sensor and install the retaining bolt.
  2.  
  3. Attach the crankshaft position sensor electrical connector.
  4.  
  5. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Crankshaft Position Sensor Removal & Installation

  6.  

  1. Disconnect the negative battery cable.
  2.  
  3. Detach the crankshaft position sensor electrical connector.
  4.  
  5. Unfasten the retaining bolt, then remove the sensor.
  6.  

To install:

  1. Position the sensor and install the retaining bolt.
  2.  
  3. Attach the crankshaft position sensor electrical connector.
  4.  
  5. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Crankshaft Position Sensor Removal & Installation

  6.  

  1. Disconnect the negative battery cable.
  2.  
  3. Detach the crankshaft position sensor electrical connector.
  4.  
  5. Unfasten the retaining bolt, then remove the sensor.
  6.  

To install:

  1. Position the sensor and install the retaining bolt.
  2.  
  3. Attach the crankshaft position sensor electrical connector.
  4.  
  5. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Crankshaft Position Sensor Removal & Installation

  6.  

  1. Disconnect the negative battery cable.
  2.  
  3. Detach the crankshaft position sensor electrical connector.
  4.  
  5. Unfasten the retaining bolt, then remove the sensor.
  6.  

To install:

  1. Position the sensor and install the retaining bolt.
  2.  
  3. Attach the crankshaft position sensor electrical connector.
  4.  
  5. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Crankshaft Position Sensor Removal & Installation

  6.  

  1. Disconnect the negative battery cable.
  2.  
  3. Detach the crankshaft position sensor electrical connector.
  4.  
  5. Unfasten the retaining bolt, then remove the sensor.
  6.  

To install:

  1. Position the sensor and install the retaining bolt.
  2.  
  3. Attach the crankshaft position sensor electrical connector.
  4.  
  5. Connect the negative battery cable.

    Click image to see an enlarged view

    Fig. Crankshaft Position Sensor Removal & Installation

  6.  

1.8L, 2.4L, 3.0L (SOHC & DOHC), 3.5L, & 1997-00 1.5L Engines


Click image to see an enlarged view

Fig. Remove the two CKP sensor retaining bolts-2.4L engine shown, others similar



Click image to see an enlarged view

Fig. Remove the sensor and slide the reluctor wheel off of the crankshaft-2.4L engine shown, others similar

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the timing belt, as outlined in Section 3 of this manual.
  4.  
  5. Unplug the sensor connector.
  6.  
  7. Unfasten the retaining bolts, then remove the sensor from the vehicle.
  8.  
  9. Installation is the reverse of the removal procedure.
  10.  

Testing



This sensor produces a pulse signal based on information gathered while the engine is running. Testing the CKP sensor requires several special tools that are very expensive to purchase. Due to this fact, we have determined testing this sensor to be beyond the scope of the do-it-yourself mechanic. The sensor can be monitored with an appropriate scan tool using a data display or other data stream information. Follow the instructions included with the scan tool for information on accessing the data.

  1. Disconnect the sensor connector and measure at the harness side.
  2.  
  3. Turn the ignition switch to the "ON" position.
  4.  
  5. Measure the voltage between terminal No. 2 and ground. Voltage should be between 4.8 and 5.2 volts.
  6.  
  7. Turn the ignition switch to the "LOCK" (OFF) position.
  8.  
  9. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. Repair/replace as necessary.
  10.  
  11. If within specifications, disconnect the sensor connector and measure at the harness side.
  12.  
  13. Turn the ignition switch to the "ON" position.
  14.  
  15. Measure the voltage between terminal No. 3 and ground. Voltage should be battery positive voltage.
  16.  
  17. Turn the ignition switch to the "LOCK" (OFF) position.
  18.  
  19. If not within specifications, check connectors and wiring between the sensor and MFI relay. Repair/replace as necessary.
  20.  
  21. If within specifications, disconnect the sensor connector and measure at the harness side.
  22.  
  23. Check for the resistance between terminal No. 1 and ground. Resistance should be less than 2 ohms.
  24.  
  25. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. If connectors and wiring between sensor and ECM/PCM are good, replace the ECM/PCM.
  26.  
  27. If within specifications, check the CKP sensor-sensing blade.
  28.  
  29. If the sensor-sensing blade is damaged, replace it.
  30.  
  31. If the sensor-sensing blade is good, replace the CKP sensor.
  32.  

  1. Disconnect the sensor connector and measure at the harness side.
  2.  
  3. Turn the ignition switch to the "ON" position.
  4.  
  5. Measure the voltage between terminal No. 2 and ground. Voltage should be between 4.8 and 5.2 volts.
  6.  
  7. Turn the ignition switch to the "LOCK" (OFF) position.
  8.  
  9. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. Repair/replace as necessary.
  10.  
  11. If within specifications, disconnect the sensor connector and measure at the harness side.
  12.  
  13. Turn the ignition switch to the "ON" position.
  14.  
  15. Measure the voltage between terminal No. 3 and ground. Voltage should be battery positive voltage.
  16.  
  17. Turn the ignition switch to the "LOCK" (OFF) position.
  18.  
  19. If not within specifications, check connectors and wiring between the sensor and MFI relay. Repair/replace as necessary.
  20.  
  21. If within specifications, disconnect the sensor connector and measure at the harness side.
  22.  
  23. Check for the resistance between terminal No. 1 and ground. Resistance should be less than 2 ohms.
  24.  
  25. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. If connectors and wiring between sensor and ECM/PCM are good, replace the ECM/PCM.
  26.  
  27. If within specifications, check the CKP sensor-sensing blade.
  28.  
  29. If the sensor-sensing blade is damaged, replace it.
  30.  
  31. If the sensor-sensing blade is good, replace the CKP sensor.
  32.  

  1. Disconnect the sensor connector and measure at the harness side.
  2.  
  3. Turn the ignition switch to the "ON" position.
  4.  
  5. Measure the voltage between terminal No. 2 and ground. Voltage should be between 4.8 and 5.2 volts.
  6.  
  7. Turn the ignition switch to the "LOCK" (OFF) position.
  8.  
  9. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. Repair/replace as necessary.
  10.  
  11. If within specifications, disconnect the sensor connector and measure at the harness side.
  12.  
  13. Turn the ignition switch to the "ON" position.
  14.  
  15. Measure the voltage between terminal No. 3 and ground. Voltage should be battery positive voltage.
  16.  
  17. Turn the ignition switch to the "LOCK" (OFF) position.
  18.  
  19. If not within specifications, check connectors and wiring between the sensor and MFI relay. Repair/replace as necessary.
  20.  
  21. If within specifications, disconnect the sensor connector and measure at the harness side.
  22.  
  23. Check for the resistance between terminal No. 1 and ground. Resistance should be less than 2 ohms.
  24.  
  25. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. If connectors and wiring between sensor and ECM/PCM are good, replace the ECM/PCM.
  26.  
  27. If within specifications, check the CKP sensor-sensing blade.
  28.  
  29. If the sensor-sensing blade is damaged, replace it.
  30.  
  31. If the sensor-sensing blade is good, replace the CKP sensor.
  32.  

  1. Disconnect the sensor connector and measure at the harness side.
  2.  
  3. Turn the ignition switch to the "ON" position.
  4.  
  5. Measure the voltage between terminal No. 2 and ground. Voltage should be between 4.8 and 5.2 volts.
  6.  
  7. Turn the ignition switch to the "LOCK" (OFF) position.
  8.  
  9. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. Repair/replace as necessary.
  10.  
  11. If within specifications, disconnect the sensor connector and measure at the harness side.
  12.  
  13. Turn the ignition switch to the "ON" position.
  14.  
  15. Measure the voltage between terminal No. 3 and ground. Voltage should be battery positive voltage.
  16.  
  17. Turn the ignition switch to the "LOCK" (OFF) position.
  18.  
  19. If not within specifications, check connectors and wiring between the sensor and MFI relay. Repair/replace as necessary.
  20.  
  21. If within specifications, disconnect the sensor connector and measure at the harness side.
  22.  
  23. Check for the resistance between terminal No. 1 and ground. Resistance should be less than 2 ohms.
  24.  
  25. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. If connectors and wiring between sensor and ECM/PCM are good, replace the ECM/PCM.
  26.  
  27. If within specifications, check the CKP sensor-sensing blade.
  28.  
  29. If the sensor-sensing blade is damaged, replace it.
  30.  
  31. If the sensor-sensing blade is good, replace the CKP sensor.
  32.  

  1. Disconnect the sensor connector and measure at the harness side.
  2.  
  3. Turn the ignition switch to the "ON" position.
  4.  
  5. Measure the voltage between terminal No. 2 and ground. Voltage should be between 4.8 and 5.2 volts.
  6.  
  7. Turn the ignition switch to the "LOCK" (OFF) position.
  8.  
  9. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. Repair/replace as necessary.
  10.  
  11. If within specifications, disconnect the sensor connector and measure at the harness side.
  12.  
  13. Turn the ignition switch to the "ON" position.
  14.  
  15. Measure the voltage between terminal No. 3 and ground. Voltage should be battery positive voltage.
  16.  
  17. Turn the ignition switch to the "LOCK" (OFF) position.
  18.  
  19. If not within specifications, check connectors and wiring between the sensor and MFI relay. Repair/replace as necessary.
  20.  
  21. If within specifications, disconnect the sensor connector and measure at the harness side.
  22.  
  23. Check for the resistance between terminal No. 1 and ground. Resistance should be less than 2 ohms.
  24.  
  25. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. If connectors and wiring between sensor and ECM/PCM are good, replace the ECM/PCM.
  26.  
  27. If within specifications, check the CKP sensor-sensing blade.
  28.  
  29. If the sensor-sensing blade is damaged, replace it.
  30.  
  31. If the sensor-sensing blade is good, replace the CKP sensor.
  32.  

  1. Disconnect the sensor connector and measure at the harness side.
  2.  
  3. Turn the ignition switch to the "ON" position.
  4.  
  5. Measure the voltage between terminal No. 2 and ground. Voltage should be between 4.8 and 5.2 volts.
  6.  
  7. Turn the ignition switch to the "LOCK" (OFF) position.
  8.  
  9. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. Repair/replace as necessary.
  10.  
  11. If within specifications, disconnect the sensor connector and measure at the harness side.
  12.  
  13. Turn the ignition switch to the "ON" position.
  14.  
  15. Measure the voltage between terminal No. 3 and ground. Voltage should be battery positive voltage.
  16.  
  17. Turn the ignition switch to the "LOCK" (OFF) position.
  18.  
  19. If not within specifications, check connectors and wiring between the sensor and MFI relay. Repair/replace as necessary.
  20.  
  21. If within specifications, disconnect the sensor connector and measure at the harness side.
  22.  
  23. Check for the resistance between terminal No. 1 and ground. Resistance should be less than 2 ohms.
  24.  
  25. If not within specifications, check connectors and wiring between the sensor and ECM/PCM. If connectors and wiring between sensor and ECM/PCM are good, replace the ECM/PCM.
  26.  
  27. If within specifications, check the CKP sensor-sensing blade.
  28.  
  29. If the sensor-sensing blade is damaged, replace it.
  30.  
  31. If the sensor-sensing blade is good, replace the CKP sensor.
  32.  

 
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