Mitsubishi Eclipse 1990-1998 Repair Guide

Camshaft Position (CMP) Sensor

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OPERATION



The computer control module uses the CMP sensor to determine the position of the No. 1 piston during its power stroke. This signal is used by the computer control module to calculate fuel injection mode of operation.

If the cam signal is lost while the engine is running, the fuel injection system will shift to a calculated fuel injected mode based on the last fuel injection pulse, and the engine will continue to run.

TESTING



1990-94 Vehicles

See Figures 1 and 2

  1. Detach the camshaft position sensor connector.
  2.  
  3. Attach an ohmmeter to connector harness terminal No. 3 on the 1.8L engine or terminal 4 on the 2.0L engine and ground and check for continuity. If there is no continuity, replace the sensor.
  4.  



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Fig. Fig. 1: Testing the camshaft position sensor harness for continuity-1.8L engine

  1. Check the voltage at the harness with the connector detached, ignition ON and the ohmmeter connected to ground and the No. 4 harness terminal for the 1.8L engine or the No. 1 harness terminal for the 2.0L engine. The voltage reading should be 4.8-5.2 ohms. If not within specifications, replace the harness. If within specifications replace the sensor.
  2.  



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Fig. Fig. 2: Check the camshaft position sensor harness for proper voltage-2.0L engine

1995-98 Vehicles
2.0l non-turbo engines

See Figure 3

  1. Detach the sensor connector, then use an ohmmeter to measure at the harness side.
  2.  
  3. With the ignition switch ON , measure the voltage between harness No. 1 and ground. It should be 8.5-9.5 volts.
  4.  



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Fig. Fig. 3: Camshaft sensor terminal identification-1995-98 2.0L non-turbo engine

  1. Check the voltage between terminal No. 3 and ground. It should be 4.8-5.2 volts.
  2.  
  3. Check to see if there is continuity between the No. 2 terminal and ground. There should be continuity.
  4.  
  5. If the voltage readings are correct, and there is continuity, replace the sensor. If not, repair or replace the harness, or the PCM may be faulty.
  6.  

2.0L turbo and 2.4L engines

See Figure 4

  1. Attach the connector, use test harness MD998478 or equivalent.
  2.  
  3. With the engine cranking, check the voltage between the No. 2 terminal and ground. It should be 0.4-3.0 volts.
  4.  
  5. With the engine idling, check the voltage between the No 2 terminal and ground. It should be 0.5-2.0 volts.
  6.  
  7. If these specifications are met, the PCM may be faulty.
  8.  



Click image to see an enlarged view

Fig. Fig. 4: Camshaft position sensor terminal identification-2.0L turbo and 2.4L engines

  1. Detach the sensor connector and measure at the harness side. Attach an ohmmeter.
  2.  
  3. With engine cranking, measure the voltage between terminal No. 2 and ground. It should be 0.4-3.0 volts.
  4.  
  5. With the engine idling, measure the voltage between terminal No. 2 and ground. It should be 4.8-5.2 volts.
  6.  
  7. Check to see if there is continuity between terminal No. 1 and ground, there should be continuity.
  8.  
  9. If the voltage readings are correct, and there is continuity, replace the sensor. If not, repair or replace the harness, or the PCM may be faulty.
  10.  

REMOVAL & INSTALLATION



1995-98 Vehicles
2.0L non-turbo engines
  1. Disconnect the negative battery cable.
  2.  
  3. Detach the air intake hose.
  4.  
  5. Detach the camshaft position sensor connector.
  6.  
  7. Unfasten the retaining bolts, then remove the camshaft position sensor.
  8.  
  9. If necessary, remove the retaining bolts, then remove the target magnet.
  10.  

To install:
  1. If removed, install the target magnet by aligning the off-set tabs of the magnet with the off-set holes of the camshaft. Tighten the retaining bolts to 2 ft. lbs. (3 Nm).
  2.  
  3. Position the sensor, and secure with the retaining bolts. Tighten to 7 ft. lbs. (9 Nm).
  4.  
  5. Attach the sensor electrical connector.
  6.  
  7. Install the air intake hose, then connect the negative battery cable.
  8.  

2.0l turbo and 2.4l engines

See Figures 5 and 6

  1. Disconnect the negative battery cable.
  2.  
  3. Detach the sensor connector.
  4.  
  5. Unfasten the retaining bolt, then remove the sensor and the O-ring.
  6.  



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Fig. Fig. 5: Exploded view of the camshaft and crankshaft position sensors-2.0L turbo engines



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Fig. Fig. 6: Camshaft and crankshaft position sensor locations-2.4L engines

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

 
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