Looking for 2004 PCM Pin Diagram

[2004XLT]

I’m looking for a diagram of the PCM pins for my 2004 4.6. I’m trying to fond the cause of my P0320 and I want to check the wire back to the PCM for continuity. My owner’s manual doesn’t have the diagram.

 

[Don Hall]

Have both 2004 Expedition manuals with alphabetical index.
Nothing listed as PCM PINS. Can you provide me with a complete
description?

 

[2004XLT]

I’m looking for the diagram of the PCM including all three connectors, with each pin numbered with an index showing what each one is for.

Something like this:

https://cimg9.ibsrv.net/gimg/www.fo..._2b753a0f5ff9b4e2f840388a52bae623b7d483bd.png

Thanks for the quick reply

 

[Don Hall]

Excuse my ignorance, but I need to know the complete name of a PCM
so I can locate the section in the manual from the alphabetical index.

 

[2004XLT]

Sorry, I misunderstood your question. It stands for Powertrain control module

 

[Don Hall]

Direct from the manual section 303-14-4:

POWERTRAIN CONTROL MODULE (PCM).

 

[thesavo]

Hey @don I think the op is looking for a pinout diagram of the pcm from the wiring section of the service manual.

It's usually in chapter /cell 150, called "connector views" (though that # does change)
Older Ford wiring manuals called it C175, or C185 or there abouts. IF the PCM had more one, it would have a letter after it like C175b, etc.

Example shown Below from '93 f-series for lack of a better one.

(image removed to avoid confusion)

Op, you should check eBay for the paper evtm (wiring manual) or service DVD, they are cheap. Also, only buy the official Ford manual /DVD. The red DVDs usually have the whole model range for the lower numbered model year. So in your case you would look for a 2004—2005 dvd. You may get lucky with a 2003-2004, but in my experience, it's never the full range for the second year. You also have to turn off auto update time and roll your computer date back to when it was published.


https://www.ebay.com/itm/313053412067

https://www.ebay.com/itm/264443402189



Sent from my SM-N975U using Tapatalk

 

[thesavo]

Here are the three connector pinouts for the PCM connectors . What else do you need?

 

[2004XLT]

Thanks for that. I'm diagnosing a CEL for the crankshaft position sensor, so if you have access to the wiring diagram for it that would be great. I think I have a short somewhere between the sensor and PCM causing an intermittent stall/jerking and occasional shut off in drive and reverse.

 

[thesavo]

Crank shaft position circuit for a 4.6L,

I do believe that is c101. brb

Sent from my SM-N975U using Tapatalk

 

[Hamfisted]

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).

 

[thesavo]

Here is the system diagram for the Crankshaft position sensor.



And the location.

 

[2004XLT]

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.

 

[thesavo]

Did you do a continuity test on the the two wires from the sensor to the pcm?

Sent from my SM-N975U using Tapatalk

 

[2004XLT]

The continuity test passed. What would you do next?

 

[2004XLT]

Could my P0320 be caused by any of the speed sensors on the transmission?

 

[Hamfisted]

Could my P0320 be caused by any of the speed sensors on the transmission?

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.

 

[thesavo]

Can you check that the shield is connected to ground?

Sent from my SM-N975U using Tapatalk

 

[2004XLT]

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.

 

[thesavo]

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.

Check the pdf package I sent you. It has a ground diagram and location.

Sent from my SM-N975U using Tapatalk