AutoZone 2002 Nissan/Datsun Truck Pathfinder 2WD (PR) 3.3L SFI (PR) 6cyl | Repair Guides | Engine Performance & Emission Controls | Components & Systems | Crankshaft Position Sensor | AutoZone.com

Search suggestions

    My Vehicles

    2002 Nissan/Datsun Truck Pathfinder 2WD (PR) 3.3L SFI (PR) 6cyl

    My Store

    405 N COLLEGE ST
    (479) 443-4043

    OPEN 'til 9:00 PM today

    SAVE 20% + GET A $10 GIFT CARD ON ONLINE SHIP TO HOME ORDERS OVER $100.

    Use Code: 20STACK10

    See Details

    2007 Jeep Compass

    Crankshaft Position Sensor

    Print

    Operation



    Specific to:

    Jeep Compass 2007-2009

    Jeep Patriot 2007-2009

    The Crankshaft Position (CKP) sensor is a permanent magnet output coil device that monitors the speed and position of the crankshaft. A reluctor is attached directly to the crankshaft, and is used to generate a constant signal as it passes the CKP sensor magnetic coil. The CKP sensor utilizes system voltage (12 volts DC), or reference voltage (5 volts DC) to generate a digital output signal to the PCM that is based upon a 0.5 volt AC reference. The alternating magnetic field is used by the sensor output electronics to produce a digital pulse. The CKP sensor returns a digital ON/OFF signal pulse during each revolution of the crankshaft, with a momentary signal interrupt for the Top Dead Center (TDC) position of the No. 1 cylinder. The Pulse Width Modulation pattern is used by the Powertrain Control Module (PCM) to calculate ignition timing, fuel injector timing, misfire diagnostics, and the tachometer display.  

    Removal & Installation



    Specific to:

    Jeep Compass 2007-2009

    Jeep Patriot 2007-2009

    The crankshaft position sensor mounts to the rear of the engine block near the transmission.

    1. Before servicing the vehicle, refer to the Precautions Section.
    2.  
    3. Remove the engine cover.
    4.  
    5. Disconnect and isolate the negative battery cable.
    6.  
    7. Remove the air cleaner body.
    8.  
    9. Disengage the upstream O2 sensor wire harness retainer (1) and the Crankshaft Position (CKP) sensor wire harness retainer (2) from the heat shield (3).

      Click image to see an enlarged view

      Fig. Disengage the upstream O2 sensor wire harness retainer and the CKP sensor wire harness retainer from the heat shield

    10.  
    11. Remove the one nut and two heat shield retaining bolts.
    12.  
    13. Remove the heat shield.
    14.  
    15. Remove the CKP sensor mounting bolt.
    16.  
    17. Remove the CKP sensor with the wire harness attached.
    18.  
    19. Unlock and disconnect the electrical connector from the CKP sensor.

      Click image to see an enlarged view

      Fig. Crankshaft Position (CKP) sensor location-2.0L and 2.4L engines

    20.  

    To install:

    1. Check the O-ring for damage and lubricate the O-ring with engine oil before installing the sensor.
    2.  
    3. Using a twisting motion, install the CKP sensor.
    4.  
    5. Install the CKP sensor bolt. Tighten the bolt to 80 inch lbs. (9 Nm).
    6.  
    7. Connect and lock the electrical connector to the CKP sensor.
    8.  
    9. Install the heat shield with the one nut and two heat shield retaining bolts.
    10.  
    11. Install the upstream O2 sensor wire harness retainer (1) and the CKP sensor wire harness retainer (2) to the heat shield (3).
    12.  
    13. Install the air cleaner body.
    14.  
    15. Connect the negative battery cable.
    16.  
    17. Install the engine cover.
    18.  

    Testing



    Specific to:

    Jeep Compass 2007-2009

    Jeep Patriot 2007-2009


    NOTE
    Refer to the Electrical Wiring Diagram for component and connector locations, connector views, and circuit-specific information.

    CKP Circuit Testing

    Specific to:

    Jeep Compass 2007-2009

    Jeep Patriot 2007-2009

    Use a suitable scan tool or a Graphing Multi-Meter (GMM), in order to view the CKP data.

    CKP sensor logic is based on alternating lines of magnetic flux which generate a digital ON/OFF signal to the PCM, and are based on the speed and position of the crankshaft (See Figure 1).

    Verify that the engine timing components (timing belt, timing chain, or timing gears) are properly installed, and that there is no foreign material obstructing the path between the reluctor and the CKP sensor. If any engine mechanical faults are evident, locate and repair as required before continuing.

    A Digital Volt-Ohm Meter (DVOM) may be used to verify the condition of the wiring: additional information may be acquired by taking measurements at the sensor connector as well as the PCM connector. If significant resistance is measured (greater than 5 ohms), check the wiring harness and connections for corrosion, poor pin connections, or damaged wires.

    If all engine wiring and pin connections are confirmed, disconnect the CKP sensor to verify the signal with a GMM, and verify PCM communication before replacing the CKP sensor.

    Click image to see an enlarged view

    Fig. CKP Sensor Range Chart

    CKP Sensor Strategy

    Specific to:

    Jeep Compass 2007-2009

    Jeep Patriot 2007-2009

    The CKP sensor provides a digital input signal (See Figure 1) to the Powertrain Control Module (PCM) for a number of engine control system calculations. The CKP signal is compared with the Camshaft Position Sensor (CMP) and Vehicle Speed Sensor (VSS) for measured operating conditions, and the Pulse Width Modulation pattern is used by the Powertrain Control Module (PCM) to calculate ignition timing, fuel injector timing, misfire diagnostics, and the tachometer display.

    Connection & Wiring Diagnosis

    Specific to:

    Jeep Compass 2007-2009

    Jeep Patriot 2007-2009

    Refer to the Electrical Wiring Diagram for component and connector locations, connector views, and circuit-specific information.

    Many intermittent open or short circuits may be caused by wiring harness and connector movement due to vibration, engine torque, bumps, and rough pavement, etc.

    1. Test the wiring harness and connectors by performing the following tests:

      Move the related connectors and wiring while monitoring the appropriate scan tool data.
       
      Move the related connectors and wiring with the component commanded ON and OFF. Using a suitable the scan tool, observe the component operation.
       
      With the engine running, move the related connectors and wiring while monitoring component operation.
       
      If harness or connector movement affects the data displayed, the component and system operation, or the engine operation, inspect and repair the harness or connections as necessary.
       

    2.  
    3. Test the connector terminal pins and/or wiring by performing the following tests:

      Inspect for incorrect mating of the connector halves, or terminals not fully seated in the connector body.
       
      Inspect for improperly formed or damaged terminals and test for incorrect terminal tension.
       
      Inspect for poor terminal to wire connections including terminals crimped over insulation. This requires removing the terminal from the connector body.
       
      Inspect for corrosion or water intrusion. Pierced or damaged insulation can allow moisture to enter the wiring. The conductor can corrode inside the insulation with little visible evidence. Look for swollen and/or brittle sections of wire in the suspect circuits.
       
      Inspect for wires that are broken inside the insulation by gently pulling on suspect sections of wiring.
       

    4.  

    Related Diagnostic Trouble Codes

    Specific to:

    Jeep Compass 2007-2009

    Jeep Patriot 2007-2009



    Click image to see an enlarged view

    Fig. Related Diagnostic Trouble Codes

     
    AutoZone Logo