Question about 1999 Dodge Ram

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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

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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.

i ran a code on my 99 dodge ram 1500 and it came - 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 Sensori ran a code on my 99 dodge ram 1500 and it came - jturcotte_697.gifc
        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.

        Posted on Jan 02, 2011

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        The camshaft positioning sensor is bad, its located at the camshafts somewhere, second option is the wiring

        Posted on Jan 02, 2011

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        PCM stands for Power Control Module and No cam signal could be that the cam sensor is disconnected. see if the cam or crank sensor is connected.

        Posted on Jan 02, 2011

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