GM Cavalier/Sunfire 1995-2000 Repair Guide

Crankshaft Position (CKP) Sensor

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OPERATION



The Crankshaft Position (CKP) sensor provides a signal through the ignition module which the PCM uses as a reference to calculate rpm and crankshaft position.

TESTING



See Figure 1

  1. Turn the ignition key OFF .
  2.  
  3. Unplug the sensor electrical harness and check the terminals for corrosion and damage.
  4.  
  5. Check the sensor wiring harness wires for continuity and repair as necessary.
  6.  
  7. Attach the sensor harness making sure it is firmly engaged.
  8.  
  9. Using a Digital Volt Ohm Meter (DVOM) set on the DC scale, backprobe the sensor signal terminal (terminal A) with the positive lead of the meter and backprobe the sensor ground terminal (terminal B) with the negative lead of the meter.
  10.  
  11. Have an assistant crank the engine and observe the meter.
  12.  
  13. You should have approximately a 5 volt reference signal pulse. If not the sensor may be defective.
  14.  



Click image to see an enlarged view

Fig. Fig. 1: Attach suitable jumper wires between the CKP sensor and CKP sensor harness. A DC volt meter can then be attached to the necessary terminals to test the sensor as the engine is being cranked

REMOVAL & INSTALLATION



See Figures 2, 3, 4 and 5



Click image to see an enlarged view

Fig. Fig. 2: View of the Crankshaft Position Sensor (CKP) location-2.2L engines



Click image to see an enlarged view

Fig. Fig. 3: The Crankshaft Position (CKP) sensor location-2.3L/2.4L engines

  1. Disconnect the negative battery cable.
  2.  
  3. Raise the vehicle and support it with jackstands.
  4.  
  5. Unplug the sensor harness connector at the sensor.
  6.  
  7. Unfasten the retaining bolt, then remove the sensor from below the coil pack on 2.2L engines, and above the oil filter on the 2.3L/2.4L engines. Inspect the sensor O-ring for wear, cracks or leakage and replace if necessary.
  8.  



Click image to see an enlarged view

Fig. Fig. 4: Unfasten the Crankshaft Position (CKP) sensor retaining bolt-2.2L engine shown



Click image to see an enlarged view

Fig. Fig. 5: After the Crankshaft Position (CKP) sensor retaining bolt has been removed, grasp the sensor and pull it from its bore in the engine block using a slight twisting motion-2.2L engine shown

To install:
  1. Lubricate the O-ring with clean engine oil, then place it on the sensor.
  2.  
  3. Install the sensor and tighten the retaining bolt to 71 inch lbs. On the 2.2L engine and 88 inch lbs. (10 Nm) on the 2.3L/2.4L engine.
  4.  
  5. Attach the sensor harness connector.
  6.  
  7. If removed, install the steering linkage shield.
  8.  
  9. Lower the vehicle.
  10.  
  11. Connect the negative battery cable.
  12.  

 
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