trying to diagnose my pcm on my truck and i need a pinout. I saw the one for the 05. Are they the same? Keep getting a P0606 ... hoping its not the pcm itself. Thanks in advance for the help guys!

 

That is a PCM internal fault. It may be toasted.

I have some PDFs for you. Both the PCM (C1381) and the FICM (C1388)
so that you can trace some of the wires. The plugs are labeled as a,b,& c


Sean

 

Yahiko,
Thank You very much for the diagrams. I also heard that the P0606 could be an intermittent connection of the EOT Sensor. I just got home from work, and i am gonna go out and work on this problem now. Ill let everyone know what happens regarding the EOT sensor. Then on to testing the PCM

 

OK so no luck. All i found was that one of the EOT sensor wires was bare, and there was engine oil in the connection. The wire didnt look like it was burnt or anything. Repaired the wire and cleaned out the oil. Went ahead and cleared the DTC's and tested the for two powers and one ground at the pcm. Still getting DTC P0606. One more question ... Would the truck run with a "bad" PCM? I didnt think it would. It runs and drives fine, like any other truck, minus the MIL light ... stumped at this point.

 

Yep, It will run. I would take some time with good
light and very carefully go over all the harness to
look for any chaffing or more bare wires like you
already found. Check under the air-filter. There is
a spot under there that can get a bit squeezed. The
as you looking check the ground points to make sure
that they are clean and the crimps are tight.

Wiring problem diagnosis can be a major PITA to find.

Let me know if you need any more diagrams. I have
the DVD for 03~04 & 06~07.

As much as I hate to send someone into the dealer.
This is one of the times where it might be a good idea.
They can run some diagnostics and also re-flash the PCM.
If you do end up getting a replacement PCM you will
want to take it and the truck in and have them reprogram
the new one to match your truck's options and milage.

Sean

EDIT : Where In Colorado Are You ? We might be able to have some one scan it.

 

Ok so it turned out that the p0606 was set due to the intermittent eot sensor connection. That and my bully dog pmt needed an update. Updated and cleared all the codes, and it hasn't came back. Feeling 100% relieved. Thanks again for the help!