Question about BMW Z3

2 Answers

The wire connector to the camshaft position sensor has 3 wires. is there a schematic to show these wires so that i can check for current or voltages to determine if this sensoe is bad. not sure on how to go about this

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  • jeffmiller90 Apr 26, 2010

    ITS A 2000 BMW Z3 WITH A 2.5 6 CYL.

  • jeffmiller90 Apr 26, 2010

    OK THANK YOU FOR THE HELP

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2 Answers

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  • BMW Master
  • 2,984 Answers

  1. The static hall sensors are used on this sensor so that the camshaft positions are recognized once ignition is on and even before the engine is started.
    1. There are four functions of the intake camshaft position sensor:
    2. Cylinder bank detection for preliminary injection
    • Synchronization
    • Engine speed sensor (if crankshaft speed sensor fails)
    • Position control of the intake cam (VANOS)
    1. The exhaust camshaft sensor is used for position control of the exhaust camshaft as part of the VANOS (variable camshaft control) system.
    1. If these sensors fail, there will be no substitute values and the system will operate in the failsafe mode with no VANOS adjustment. The engine will still operate, but a significant reduction torque reduction will be quite noticeable.
    1. NOTE
    Use caution when removing or repairing the camshaft sensor and related mechanicals, as you should not want to bend the impulse wheels.



  • The problem with checking to see or testing a camshaft sensor is this:

    The output voltage of a properly operating camshaft position sensor switches from high (5.0 volts) to low (0.3 volts). By connecting an oscilloscope to the sensor output circuit, you can view the square wave pattern produced by the voltage swing

    Posted on Apr 26, 2010

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    • Master
    • 1,297 Answers

    What year is your vehicle?

    Posted on Apr 24, 2010

    • Sean Reisdorf
      Sean Reisdorf Apr 26, 2010

      still need to know year, make and model



    • Sean Reisdorf
      Sean Reisdorf Apr 27, 2010

      this should help you...

      Crankshaft sensor is a dynamic Hall-effect sensor mounted through the engine block. Signal is sent the moment the crankshaft begins to rotate. The pulse wheel is mounted directly to the crankshaft

      The engine speed (RPM) and crankshaft position input signals are provided by the inductive pulse sensor that scans the incremental gear wheel mounted on the flywheel of the engine. Operation of this sensor is the same as other M5.x systems. The rotation of the gear wheel generates an A/C voltage signal in the sensor where each tooth of the wheel produces one pulse. The engine control module counts these pulses and determines engine speed and crankshaft position. The signal from the crankshaft sensor is also used for OBD II monitoring for misfire detection.



      While BMW states you need either a scan tool or an oscilloscope to diagnose the CKP you can do a basic test just with a DVOM

      hook your DVOM to the CKP yellow and brown wire
      you should see an A/C voltage with the engine cranking



      let me know if you need anything else




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    1 Answer

    Do you have to remove the cam gear to change the camshaft senaor.


    Courtesy of a Beetle forum.

    The camshaft position sensor is located at the front of the cylinder head under the timing belt cover. On 2.0L models, the camshaft position sensor is located behind the camshaft sprocket and is equipped with a pigtail lead and a remote connector. On 1.8L turbo models, the camshaft position sensor is located at the front of the intake camshaft. check the terminals in the connector and the wires leading to the sensor for looseness and breaks. Repair as required.

    Before checking the camshaft position sensor, check the voltage supply and ground circuits from the ECM. Dosconnect the electrical connector from the camshaft position sensor and connect a voltmeter to terminals 1 and 3 at the harness connector from the camshaft position sensor and connect a voltmeter to terminals 1 and 3 at the harness connector. Turn the ignition key On - the voltage should read approximately 5.0 volts. If the voltage is incorrect, check the wiring from the camshaft position sensor to the ECM. If the circuits are good, have the ECM checked at a dealer service department or other properly equipped repair facility.

    To check the camshaft position sensor operation, reconnect hte connector to the camshaft position sensor and using a suitable probe, backprobe terminal no. 2 of the camshaft position sensor connector. Connect the positive lead of a voltmeter to the probe and the negative lead to a good engine ground point. Turn the ignition key On. Rotate the engine slowly with a breaker bar and socket attached to the crankshaft pulley center bolt while watching the meter. The voltage should fluctuate between zero volts and 10.0 volts as the vanes in the reluctor wheel past the sensor. If the test results are incorrect, replace the camshaft position sensor. Note: Rotate the engine slowly through at least two complete revolutions. Removing the spark plugs from the engine will make the crankshaft much easier to turn. Warning: If you remove the spark plugs, unplug the primary (low voltage) electrical connector(s) from the ignition coil(s) to disable the ignition system

    Jul 11, 2012 | Cars & Trucks

    1 Answer

    2003 jeep grand cherokee. I dove my jeep last nigh had no problem this morning turns over but won't start. Used my code reader and got p0340 cam shaft sensor, replaced that and still having same...


    DTC P0340 - Camshaft Position Sensor Circuit Malfunction
    This indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem could lie in any part of the circuit - the sensor itself, the wiring, or the PCM. Don't just replace the CPS (camshaft position sensor) and think that will definitely fix it.

    Symptoms can include:
    Hard starting or no start
    Rough running / misfiring
    Loss of engine power

    A code P0340 could mean one or more of the following has happened:
    a wire or connector in the circuit could be grounded/shorted/broken
    the camshaft position sensor may have failed
    the PCM may have failed
    there exists an open circuit
    the crankshaft position sensor may have failed


    With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
    Visually inspect all the wiring and connectors in the circuit
    Check for continuity in the circuit wiring
    Check the operation (voltage) of the camshaft position sensor
    Replace the camshaft position sensor as required
    Check the crankshaft position circuit as well
    Replace circuit wiring and/or connectors as required
    Diagnose/replace the PCM as required


    Monitor CMP sensor signal on a labscope looking for electrical noise that shows up on the pattern along with the CMP sensor Analog Current (AC) voltage sign wave signal.

    Check timing belt alignment specific to the auxiliary shaft gear. There is a diamond on the gear that should align with a diamond on the rear belt cover just above the gear.

    If electrical noise is present on the sensor signal, disconnect one coil pack at a time and disconnect the voltage regulator connection on the alternator to identify if the added electrical noise on the CMP signal pattern cleans up indicating the source of the electrical noise.

    If no added electrical noise is present on the pattern and the timing gears are properly aligned, check the Dark Blue/Orange (DB/O) wire to verify it is not open between the sensor and PCM pin 85.

    Also check the Grey/Red (GY/R) wire to verify it is providing a ground

    In checking timing belt alignment, the auxiliary shaft sprocket has a diamond that should align with a diamond on the timing cover at the 12:00 position of the sprocket when the camshaft and crankshaft gears are at the top dead center position. If the Camshaft Position (CMP) sensor signal shows electrical noise on the labscope, disconnect the voltage regulator connection, and the coil packs individually to see if the electrical noise on the signal cleans up pinpointing the area of failure. If electrical noise cleans up when disconnecting a coil pack, remember that any of that pack's plug wires or the pack itself may be causing the noise.

    Hope helps (remember to rate and comment this answer)..

    Sep 05, 2011 | 2002 Jeep Grand Cherokee

    1 Answer

    My 2005 f150 has a p0345 code and I don't know what that means


    P0345 Camshaft Position Sensor A Circuit Malfunction (Bank 2) A code P0345 could mean one or more of the following has happened:
    • a wire or connector in the circuit could be grounded/shorted/broken
    • the camshaft position sensor may have failed
    • the PCM may have failed
    • there exists an open circuit
    • the crankshaft position sensor may have failed
      • Visually inspect all the wiring and connectors in the circuit
      • Check for continuity in the circuit wiring
      • Check the operation (voltage) of the camshaft position sensor
      • Replace the camshaft position sensor as required
      • Check the crankshaft position circuit as well
      • Replace circuit wiring and/or connectors as required
      • Diagnose/replace the PCM as required

    Aug 07, 2011 | 2005 Ford F-150

    2 Answers

    Possible causes of camshaft position sensor circuit malfunction


    possible causes are internal electrical malfunction in the sensor,heat sensitive malfunction, cracked sensor allowing environmental damage or air space clearance,poor electrical connection,damaged connector wires or wires going to sensor,poor voltage problems,bad pcm,

    Jun 09, 2011 | Kia Sedona Cars & Trucks

    3 Answers

    I ran a code on my 99 dodge ram 1500 and it came back with " no cam signal at pcm" what does that mean exactly


    Hi, the camshaft position sensor signal is not reaching the powertrain control module. This can be a problem with the sensor, the connector, or the wiring. The sensor is inside the distributor. See figure below and some test procedures you can try from Autozone.com. Please let me know if you have more questions, and thanks for using FixYa.

    jturcotte_695.gif


    TESTING
    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.
    2. Connect the negative voltmeter lead to the ground wire.

    jturcotte_696.gif

          Fig. Camshaft Position Sensor circuit schematic
          jturcotte_697.gif
          Fig. Camshaft Position Sensor wires: (1) ORN (5v supply), (2) BK/LB (sensor ground), (3) TN/YL (camshaft position sensor signal)

          1. Turn the ignition ON . Rotate the engine. The meter should show a reading of less than 1 volt and a high voltage reading of 5.0 volts as the high and low points on the wheel pass the sensor.
          2. If there is no voltage reading at all, check the meter connections.
          3. If voltage is still not present, check for voltage at the supply wire.
          4. If 5.0 volts is not found at the supply wire, check for voltage at cavity A-17 of the 32-way connector. Leave the engine controller harness connected for this test.
          NOTE 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 sensor and supply wire. This is checked between the distributor connector and cavity A-17 . If continuity is not present, repair the wire harness.
            2. Check for continuity between the camshaft position sensor output wire and cavity A-18 at the engine controller. If continuity is not present, repair the wire harness.
            3. Check for continuity between the ground circuit wire at the distributor connector and ground. If continuity is not present, repair the wire harness.

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

          Jan 02, 2011 | 1999 Dodge Ram

          3 Answers

          P0340 code. I Changed cam sensor and checked wiring. what else could be wrong? Jeep cherokee, 6 cil


          A code P0340 could mean one or more of the following has happened:

          •a wire or connector in the circuit could be grounded/shorted/broken
          •the camshaft position sensor may have failed
          •the PCM may have failed
          •there exists an open circuit
          •the crankshaft position sensor may have failed

          With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

          •Visually inspect all the wiring and connectors in the circuit
          •Check for continuity in the circuit wiring
          •Check the operation (voltage) of the camshaft position sensor
          •Replace the camshaft position sensor as required
          •Check the crankshaft position circuit as well
          •Replace circuit wiring and/or connectors as required
          •Diagnose/replace the PCM as required

          Feb 20, 2010 | 2000 Jeep Grand Cherokee

          1 Answer

          In a Toyota Tundra v8 4.7l, after I change the Timing Belt, why does Check Engine comes on, and it shows Troubleshooting P0340.


          Symptoms Symptoms can include:
          • Hard starting or no start
          • Rough running / misfiring
          • Loss of engine power
          Causes A code P0340 could mean one or more of the following has happened:
          • a wire or connector in the circuit could be grounded/shorted/broken
          • the camshaft position sensor may have failed
          • the PCM may have failed
          • there exists an open circuit
          • the crankshaft position sensor may have failed
          Possible Solutions With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
          • Visually inspect all the wiring and connectors in the circuit
          • Check for continuity in the circuit wiring
          • Check the operation (voltage) of the camshaft position sensor
          • Replace the camshaft position sensor as required
          • Check the crankshaft position circuit as well
          • Replace circuit wiring and/or connectors as required
          • Diagnose/replace the PCM as required

          Feb 01, 2010 | 2000 Toyota Tundra

          2 Answers

          For what sensor is the code po340 on a dodge neon 04 and how i change.


          Hi,
          This indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem could lie in any part of the circuit - the sensor itself, the wiring, or the PCM. Don't just replace the CPS (camshaft position sensor) and think that will definitely fix it.

          With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

          • Visually inspect all the wiring and connectors in the circuit
          • Check for continuity in the circuit wiring
          • Check the operation (voltage) of the camshaft position sensor
          • Replace the camshaft position sensor as required
          • Check the crankshaft position circuit as well
          • Replace circuit wiring and/or connectors as required
          • Diagnose/replace the PCM as required
          Thanks.

          Jun 28, 2009 | 2004 Dodge Neon

          1 Answer

          P0340 code


          This indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem could lie in any part of the circuit - the sensor itself, the wiring, or the PCM.

          A code P0340 could mean one or more of the following has happened:
          • a wire or connector in the circuit could be grounded/shorted/broken
          • the camshaft position sensor may have failed
          • the PCM may have failed
          • there exists an open circuit
          • a crankshaft position sensor may have failed
          With a P0340 Code diagnosis can be tricky at times. Here are some things to try:
          • Visually inspect all the wiring and connectors in the circuit
          • Check for continuity in the circuit wiring
          • Check the operation (voltage) of the camshaft position sensor
          • Replace the camshaft position sensor as required
          • Check the crankshaft position circuit as well
          • Replace circuit wiring and/or connectors as required
          • Diagnose/replace the PCM as required
          The location of these 2 sensors vary. Usually they can be found on the back of the engine or on the transmission. I hope this gives you some direction. Thanks for using FixYa!

          Sincerely,

          JC

          Nov 21, 2008 | 2002 Jeep Liberty

          1 Answer

          DTC's


          DTC P1391 is "Intermittent loss of Camshaft Position Sensor (CMP) or Crankshaft Position Sensor (CKP)". So the problem is with the CMP or CKP or the wiring in the circuit.
          The Camshaft Position Sensor is located in the distributor on all engines.
          78283585.gif For this test, an analog (non-digital) voltmeter is needed. Do not remove the distributor connector from the distributor. Using small paper clips, insert them into the backside of the distributor wire harness connector to make contact with the terminals. Be sure that the connector is not damaged when inserting the paper clips. Attach voltmeter leads to these paper clips.
          1. Connect the positive (+) voltmeter lead into the sensor output wire. This is at done the distributor wire harness connector.
          2. Connect the negative (-) voltmeter lead into the ground wire.
          3. Set the voltmeter to the 15 Volt DC scale.
          4. Remove distributor cap from distributor (two screws). Rotate (crank) the engine until the distributor rotor is approximately in the 11 o'clock position. The movable pulse ring should now be within the sensor pickup.
          5. Turn ignition key to ON position. Voltmeter should read approximately 5.0 volts.
          6. If voltage is not present, check the voltmeter leads for a good connection.
          7. If voltage is still not present, check for voltage at the supply wire.
          8. If 5 volts is not present at supply wire, check for voltage at PCM 32-way connector (cavity A-17). Leave the PCM connector connected for this test.
          9. If voltage is still not present, perform vehicle test using the DRB scan tool.
          10. If voltage is present at cavity A-17, but not at the supply wire:
            1. Check continuity between the supply wire. This is checked between the distributor connector and cavity A-17 at the PCM. If continuity is not present, repair the harness as necessary.
            2. Check for continuity between the camshaft position sensor output wire and cavity A-18 at the PCM. If continuity is not present, repair the harness as necessary.
            3. Check for continuity between the ground circuit wire at the distributor connector and ground. If continuity is not present, repair the harness as necessary.

          11. While observing the voltmeter, crank the engine with ignition switch. The voltmeter needle should fluctuate between 0 and 5 volts while the engine is cranking. This verifies that the camshaft position sensor in the distributor is operating properly and a sync pulse signal is being generated. If sync pulse signal is not present, replacement of the camshaft position sensor is necessary.
          Since you replaced the CKP, we can assume it is good for the time being. But I would inspect the flywheel for damage. A damaged flywheel will make a good CKP send a bad signal.
          62383013.gif

          Oct 25, 2008 | 2002 Jeep Liberty

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