Mitsubishi Eclipse 1990-1998 Repair Guide

Crank Angle Sensor (Crankshaft Position Sensor)

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TESTING



1995-98 Vehicles
2.0l non-turbo engines
  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.  
  5. Check 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 the No. 3 terminal 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.  

2.0L TURBO AND 2.4L ENGINES

See Figure 1

  1. Attach the connector, use test harness MD998478 or equivalent.
  2.  
  3. With the engine cranking, check the voltage between the No. 2 terminal (black clip) and ground. It should be 0.4-4.0 volts.
  4.  
  5. With the engine idling, check the voltage between the No 2 terminal (black clip) and ground. It should be 1.5-2.5 volts.
  6.  
  7. If these specifications are met, the sensor and wiring is fine and the PCM may be faulty.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Crankshaft 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 the ignition switch ON , measure the voltage between terminal No. 3 and ground.
  4.  

There should be positive battery voltage.

  1. With the ignition switch ON , measure the voltage between terminal No. 2 and ground. It should be 4.8-5.2 volts.
  2.  
  3. Check to see if there is continuity between terminal No. 1 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.  

REMOVAL & INSTALLATION



1.8L Engines

See Figure 2

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the sensor harness connector.
  4.  
  5. Unscrew the cap hold-down screws and lift off the cap.
  6.  
  7. Matchmark the coupling to the sensor housing and the housing to the engine.
  8.  

Do not crank the engine during this procedure. If the engine is cranked, the matchmark must be disregarded.

  1. Remove the hold-down nut.
  2.  
  3. Carefully remove the crank angle sensor assembly from the engine.
  4.  



Click image to see an enlarged view

Fig. Fig. 2: On 1.8L the crankshaft and camshaft position sensors are built into the distributor

To install:
  1. If the timing is not disturbed, perform the following procedures:
    1. Install a new housing O-ring and lubricate with clean oil.
    2.  
    3. Install the assembly in the engine so the coupling is aligned with the matchmark on the housing and the housing is aligned with the matchmark on the engine. Make sure the sensor assembly is fully seated and the shaft is fully engaged.
    4.  
    5. Install the hold-down nut.
    6.  
    7. Connect the harness connector.
    8.  
    9. Make sure the sealing O-ring is in place, install the cap and tighten the screws.
    10.  
    11. Connect the negative battery cable.
    12.  
    13. Adjust the ignition timing, if applicable, and tighten the hold-down nut.
    14.  

  2.  
  3. If the timing is disturbed, perform the following procedures:
    1. Install a new housing O-ring and lubricate with clean oil.
    2.  
    3. Position the engine so the No. 1 piston is at TDC of its compression stroke and the mark on the vibration damper is aligned with 0 on the timing indicator.
    4.  
    5. Install the sensor in the engine so the factory matchmark on the coupling (notch) is aligned with the matchmark on the housing (punch mark) and the housing is aligned with the matchmark on the engine. Make sure the sensor assembly is fully seated and the shaft is fully engaged.
    6.  
    7. Install the hold-down nut.
    8.  
    9. Connect the harness connector.
    10.  
    11. Make sure the sealing O-ring is in place, install the cap and tighten the screws.
    12.  
    13. Connect the negative battery cable.
    14.  
    15. Adjust the ignition timing, if applicable, and tighten the hold-down nut.
    16.  

  4.  

2.0L Non-Turbo Engines

See Figure 3

  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.  



Click image to see an enlarged view

Fig. Fig. 3: Location of the crankshaft position sensor-1997 2.0L non-turbo engine shown

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.
  6.  

2.0L Turbo and 2.4L Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the timing belt, as outlined in Engine & Engine Overhaul of this repair guide.
  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.  

 
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