AutoZone 2010 Mercedes Benz CL65 AMG 6.0L SFI Twin Turbo 12cyl | Repair Guides | Driveability & Emissions Controls | Electronic Engine Controls | Camshaft Position Sensor | AutoZone.com

Search suggestions

    My Vehicles

    2010 Mercedes Benz CL65 AMG 6.0L SFI Twin Turbo 12cyl

    My Store

    405 N COLLEGE ST
    (479) 443-4043

    CLOSED Open at 7:30 AM

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

    Use Code: 20STACK10

    See Details

    Chrysler Full-Size Trucks 1989-1996 Repair Guide

    Camshaft Position Sensor

    Print

    OPERATION



    See Figures 1 and 2

    The camshaft position sensor is required for all vehicles that utilize a sequential multi-port fuel injection system. It serves this system by providing a fuel sync signal to the engine controller. The sync signal is used in conjunction with the signal sent by the crankshaft signal to maintain the correct injector firing order. On V6 and V8 engines, the camshaft position sensor is located in the distributor. On V10 engines, the camshaft position sensor is found in the timing chain case/cover on the left-front side of the engine.



    Click image to see an enlarged view

    Fig. Fig. 1: Exploded view of the camshaft position sensor mounting-4-cylinder, V6 and V8 engines



    Click image to see an enlarged view

    Fig. Fig. 2: Camshaft position sensor mounting-V10 engine

    TESTING



    4-Cylinder, V6 and V8 Engines

    See Figures 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12

    To completely test this sensor and circuitry, you need the DRBII scan tool, or equivalent. This is a test of the camshaft position sensor only.

    For this test you will need an analog (non-digital) voltmeter. Do not remove the distributor connector. Using small paper clips, insert them into the backside of the distributor wire harness connector to make contact with the terminals. Do not damage the connector when inserting the paper clips. Attach the voltmeter leads to these clips.

    1. Connect the positive voltmeter lead to the sensor output wire. This is done at the distributor wire harness connector.
    2.  
    3. Connect the negative voltmeter lead to the ground wire.
    4.  



    Click image to see an enlarged view

    Fig. Fig. 3: Use this wire color code chart to help you identify the correct wire(s) during troubleshooting



    Click image to see an enlarged view

    Fig. Fig. 4: Identify the circuit wiring you are working on with the help of this chart

    1. Set the voltmeter to the 15 volt (or 20 volt) DC scale.
    2.  



    Click image to see an enlarged view

    Fig. Fig. 5: Pin connections for the engine controller 60-way connector-1994-95 2.5L engine



    Click image to see an enlarged view

    Fig. Fig. 6: Pin connections for the engine controller 60-way connector-1994-95 Dakota 3.9L and 5.2L engines



    Click image to see an enlarged view

    Fig. Fig. 7: Pin connections for the engine controller 60-way connector-1994-95 Ram pickup 3.9L engine



    Click image to see an enlarged view

    Fig. Fig. 8: Pin connections for the engine controller 60-way connector-1994-95 Ram pickup 5.2L and 5.9L engines



    Click image to see an enlarged view

    Fig. Fig. 9: Pin connections for the engine controller 60-way connector-1996 Dakota 2.5L engine



    Click image to see an enlarged view

    Fig. Fig. 10: Pin connections for the engine controller 60-way connector-1996 Dakota 3.9L and 5.2L engines



    Click image to see an enlarged view

    Fig. Fig. 11: Pin connections for the engine controller 60-way connector-1996 Ram pickup 3.9L engine



    Click image to see an enlarged view

    Fig. Fig. 12: Pin connections for the engine controller 60-way connector-1996 Ram pickup 5.2L and 5.9L engines

    1. Remove the distributor cap and crank the engine. On 4-cylinder engines, rotate the engine until the rotor is pointed to approximately the 11:00 o'clock position. On V6 and V8 engines, rotate the engine until the distributor rotor is pointed towards the rear of the vehicle. The moveable pulse ring should now be within the camshaft position sensor pickup.
    2.  
    3. Turn the ignition ON . The voltmeter reading should read approximately 5.0 volts. If there is no voltage reading, check the meter connections.
    4.  
    5. If voltage is still not present, check for voltage at the supply wire.
    6.  

    Refer to the engine controller pin connection charts when performing these test procedures.

    1. If 5.0 volts is not found at the supply wire, check for voltage at pin-7 of the engine controller 60-way connector (1994-95 models) or cavity A-17 of the 32-way connector (1996 only). Leave the engine controller harness connected for this test.
    2.  

    If voltage is not found at the PCM connector, you will need to diagnose the system using a DRBII scan tool, or equivalent, or take the vehicle to a qualified shop.

    1. If voltage is present at the engine controller connector, but not the supply wire:
      1. Check continuity between the supply wire. This is checked between the distributor connector and pin-7 (1994-95 models) or cavity A-17 (1996 only). If continuity is not present, repair the wire harness.
      2.  
      3. Check for continuity between the camshaft position sensor output wire and pin-44 (1994-95 models) or cavity A-18 (1996 models) at the engine controller. If continuity is not present, repair the wire harness.
      4.  
      5. Check for continuity between the ground circuit wire at the distributor connector and ground. If continuity is not present, repair the wire harness.
      6.  

    2.  
    3. Crank the engine while observing the voltmeter. The voltmeter needle should fluctuate 0-5 volts. This will verify the camshaft position sensor is operating properly and a sync pulse signal is being generated.
    4.  
    5. If a sync pulse signal is not detected, and all other variables have been eliminated, replace the camshaft position sensor.
    6.  

    V10 Engine

    See Figure 13

    The only test you can perform without a DRBII scan tool, or its equivalent, is a basic check of the sensor only.

    1. Near the rear of the intake manifold, unplug the sensor pigtail harness connector from the main wire harness connector.
    2.  



    Click image to see an enlarged view

    Fig. Fig. 13: End view of the camshaft position sensor connector and terminal identification-8.0L engine

    1. Set the ohmmeter to the 1K-10K scale. Place the ohmmeter leads across terminals B and C (see drawing). The meter reading should be open (infinite resistance). If a low resistance is read, replace the camshaft position sensor.
    2.  

    REMOVAL & INSTALLATION



    4-Cylinder, V6 and V8 Engines

    See Figure 14

    1. On V6 and V8 engines, remove the air cleaner assembly.
    2.  
    3. Disconnect the negative battery cable.
    4.  
    5. Remove the distributor cap and unplug the camshaft position sensor wire.
    6.  
    7. Remove the rotor from the shaft, then lift the camshaft position sensor assembly from the distributor.
    8.  



    Click image to see an enlarged view

    Fig. Fig. 14: Exploded view of the camshaft position sensor mounting-4-cylinder, V6 and V8 engines

    To install:
    1. Install the camshaft position sensor, aligning the sensor notch to the housing.
    2.  
    3. Connect the wire, install the rotor and cap.
    4.  
    5. Install the air cleaner assembly, if removed.
    6.  

    V10 Engine

    See Figure 15

    A thin plastic rib is molded into the face of the camshaft position sensor to position the depth of the sensor to the upper cam gear (sprocket). This rib is found on original and replacement sensors. The first time the engine is operated with the new sensor, part of the rib may be sheared (ground) off. Depending on parts tolerances, some of the plastic rib may still be observed after removal.



    Click image to see an enlarged view

    Fig. Fig. 15: Location of the camshaft position sensor-8.0L engine

    SENSOR REPLACEMENT-OLD SENSOR

    This procedure will require a special peel-and-stick paper spacer of a calibrated thickness for setting the tolerance of the sensor upon installation. This special paper should be available from the dealer parts department.

    If the original camshaft position sensor is to be removed and installed, such as when servicing the timing chain, timing gears or timing chain cover, use this procedure.

    1. Unplug the sensor harness connector from the engine harness.
    2.  
    3. Remove the sensor mounting bolt.
    4.  
    5. Carefully pry the sensor from the timing chain case/cover in a rocking action with two small prytools.
    6.  
    7. Remove the sensor. Check the condition of the sensor O-ring.
    8.  

    To install:

    When installing a used camshaft position sensor, the depth must be adjusted.

    1. Inspect the face of the sensor. If any of the original rib material remains, cut it flush to the face of the sensor with a razor knife. Remove only enough of the rib material until the face is flat.
    2.  


    WARNING
    Do not remove more rib material than necessary or damage to the sensor may result. Never use an electric grinder to remove rib material, as the magnetic field from the electric motor may cause electrical damage to the sensor.

    1. Apply the special peel-and-stick paper spacer to the (clean and flat) face of the sensor.
    2.  
    3. Apply a small amount of clean engine oil to the O-ring.
    4.  
    5. Using a slight rocking action, install the sensor into the timing case/cover until the paper spacer just contacts the gear. Do not twist the sensor or you may tear the paper or O-ring. Do not install the mounting bolt.
    6.  
    7. Use a scribe to scratch a line into the timing case/cover to indicate the depth of the sensor, then remove the sensor.
    8.  
    9. Remove the paper spacer so it will not remain in the engine and get lost in the engine oil passages.
    10.  
    11. Again, apply a small amount of oil to the sensor O-ring and install the sensor until it aligns with the scribe mark.
    12.  
    13. Install the mounting bolt, tightening it to 50 inch lbs. (6 Nm).
    14.  
    15. Plug-in the engine wire harness connector to the sensor connector.
    16.  

    SENSOR REPLACEMENT-NEW SENSOR

    Use this procedure if a NEW camshaft position sensor is to be installed.

    1. Unplug the wire connectors and unbolt the sensor.
    2.  
    3. Carefully pry the sensor from the timing chain case/cover in a rocking action with two small prytools.
    4.  
    5. Remove the sensor. Check the condition of the sensor O-ring.
    6.  

    To install:
    1. Lightly lubricate the O-ring with fresh engine oil.
    2.  
    3. Using a slight rocking action, install the sensor into the timing case/cover until the paper spacer just contacts the gear. Do not twist the sensor or you may tear the O-ring. Push the sensor all the way into the cover until the rib material on the sensor contacts the camshaft gear.
    4.  
    5. Install the mounting bolt, tightening it to 50 inch lbs. (6 Nm).
    6.  
    7. Connect the sensor wiring.
    8.  

     
    AutoZone Logo