1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Looking for 2004 PCM Pin Diagram

Discussion in '2nd Gen - 2003 - 2006' started by 2004XLT, May 14, 2020.

  1. Hamfisted

    Hamfisted Full Access Members

    Posts:
    846
    Likes Received:
    255
    Joined:
    Nov 20, 2012
    Location:
    Ft Lauderdale
    The harness in that area around the AC compressor is susceptible to corrosion at the splice points. Clean it up with some brake cleaner, and carefully, with the engine running wiggle it around with your hand and see if you can get the engine to stall or miss. Or, you might just need a new crankshaft position sensor. The Grey and Dark Blue wires off the crank position sensor just go straight up to the PCM plug (pins 30 & 41 middle plug).




    [​IMG]
     
    Last edited: May 22, 2020 at 8:31 AM
    2004XLT likes this.
  2. thesavo

    thesavo Full Access Members

    Age:
    38
    Posts:
    123
    Likes Received:
    25
    Joined:
    Aug 3, 2016
    Location:
    Schenectady, NY
    Here is the system diagram for the Crankshaft position sensor.

    2004-expedition-021-Engine_controls_Page_1.png

    And the location.

    2004-expedition-151-42-C101.png
     
    2004XLT likes this.
  3. 2004XLT

    2004XLT Full Access Members

    Posts:
    311
    Likes Received:
    18
    Joined:
    Sep 26, 2014
    Location:
    CT
    Thanks for all that.

    I already replaced the sensor, wiring all looks good and didn't notice a change when moving the wires with the engine running. The wires to the connector for the sensor look like they feed into a larger loom that also contains the wiring for the starter, I guess I'll have to take that apart next.
     
  4. thesavo

    thesavo Full Access Members

    Age:
    38
    Posts:
    123
    Likes Received:
    25
    Joined:
    Aug 3, 2016
    Location:
    Schenectady, NY
    Did you do a continuity test on the the two wires from the sensor to the pcm?

    Sent from my SM-N975U using Tapatalk
     
  5. 2004XLT

    2004XLT Full Access Members

    Posts:
    311
    Likes Received:
    18
    Joined:
    Sep 26, 2014
    Location:
    CT
    The continuity test passed. What would you do next?
     
  6. 2004XLT

    2004XLT Full Access Members

    Posts:
    311
    Likes Received:
    18
    Joined:
    Sep 26, 2014
    Location:
    CT
    Could my P0320 be caused by any of the speed sensors on the transmission?
     
  7. Hamfisted

    Hamfisted Full Access Members

    Posts:
    846
    Likes Received:
    255
    Joined:
    Nov 20, 2012
    Location:
    Ft Lauderdale


    NO


    Is the area of the crankshaft position sensor and plug covered in dirt and grime ? Hopefully you gave the plug a good spray cleaning with contact cleaner or brake cleaner.
     
  8. thesavo

    thesavo Full Access Members

    Age:
    38
    Posts:
    123
    Likes Received:
    25
    Joined:
    Aug 3, 2016
    Location:
    Schenectady, NY
    Can you check that the shield is connected to ground?

    Sent from my SM-N975U using Tapatalk
     
  9. 2004XLT

    2004XLT Full Access Members

    Posts:
    311
    Likes Received:
    18
    Joined:
    Sep 26, 2014
    Location:
    CT
    I cleaned the connection with electronics cleaner. The sensor grounds to the timing cover right? I guess I’ll take it out and clean the surface.
     
  10. thesavo

    thesavo Full Access Members

    Age:
    38
    Posts:
    123
    Likes Received:
    25
    Joined:
    Aug 3, 2016
    Location:
    Schenectady, NY
    Check the pdf package I sent you. It has a ground diagram and location.

    Sent from my SM-N975U using Tapatalk
     

Share This Page