High Idle
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
This is not even a complete list but there are a lot, that's why usually we talk about the DPC Family. POWER STROKE PCM CALIBRATION INFORMATION[1] (1).pdf
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 27
From: Mesa AZ
The PCM in my wife's truck is NVK4 DPC-422
XC3F-12A650-BF
I pulled it out to look at the numbers and snap a photo. When I put it back in the truck, I started up the engine and tried the switch. I did not work since the PCM lost power when it was unplugged. I sorta expected that to happen based on what I had read so I immediately took the truck for a drive to reset the PTO circuit. I drove about 1/2 mile and pulled over to try it again and it worked fine. Keep in mind you will have to be in Park with your foot off of the brake for the high idle to work. You do not need to set the Parking Brake.
Good luck. I hope your experiment is successful.
Posting Guru
Joined: Apr 2010
Posts: 1,112
Likes: 0
From: South Shore, MA
Is there any reason that code won't work properly for my truck?
Any idea what's different about it, and my CKX0? (PTO stuff aside)
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 27
From: Mesa AZ
I am a bit clueless as to what the various codes mean and how interchangeable they might be. If it helps any, my wife's truck is an F-250 4x4 CC Lariat auto with all the normal options.
Posting Guru
Joined: Apr 2010
Posts: 1,112
Likes: 0
From: South Shore, MA
Thanks for the help so far!!!
Lead Driver
Joined: Mar 2004
Posts: 5,372
Likes: 108
From: Northern Indiana
That is also what I found out also. It seems rare to find a pto tranny in a 250 unless it was ordered that way.
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Mountain Pass
Joined: Jun 2010
Posts: 205
Likes: 3
As for the high idle.....good luck and i hope you get it working. I couldn't get mine to work with the wiring and didn't want to gamble on the PCM flash so i just dropped the idea and maybe the AIC will be on ebay a little cheaper this summer and i can snag one then. Yall have fun and good luck with the truck and congrats with the little guy.
Posting Guru
Joined: Apr 2010
Posts: 1,112
Likes: 0
From: South Shore, MA
Congrats dude, they are a joy to have. But you should tell her you need all the garage time now so you can spend time with her and the baby in a few days/weeks, but then again i remember the hormone levels and retract my previous statement.
As for the high idle.....good luck and i hope you get it working. I couldn't get mine to work with the wiring and didn't want to gamble on the PCM flash so i just dropped the idea and maybe the AIC will be on ebay a little cheaper this summer and i can snag one then. Yall have fun and good luck with the truck and congrats with the little guy.
As for the high idle.....good luck and i hope you get it working. I couldn't get mine to work with the wiring and didn't want to gamble on the PCM flash so i just dropped the idea and maybe the AIC will be on ebay a little cheaper this summer and i can snag one then. Yall have fun and good luck with the truck and congrats with the little guy.
As far as the PCM flash goes, I've been thinking I want to hold of on that - try to keep my current PCM code. Just don't want to create more (unrelated) problems.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 27
From: Mesa AZ
The high idle feature does not work on my 2000 F-450 and it has a non-PTO trans from ATS. I found this to be odd since I am pretty sure that PTO transmissions were pretty standard on the F450/550 models.
So, this leads me to the next logical question...
How can the PCM tell if a PTO trans is installed? PTO and non-PTO transmissions have the exact same electrical connectors as far as I can tell. The only difference that I know of is with the Turbine Shaft Speed Sensor, which is a different length for PTO units. I wonder if there is any way for the PCM to distinguish between the two sensor types and that is how it can tell which trans type is installed?
I believe this calls for a PM to Mr K.....I will sent one and see if he responds.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 27
From: Mesa AZ
I sent a PM to Mark Kovalsky and it is his belief the PCM has no way of knowing which trans type is installed. (PTO or non-PTO).
Posting Guru
Joined: Apr 2010
Posts: 1,112
Likes: 0
From: South Shore, MA
Posting Guru
Joined: Apr 2010
Posts: 1,112
Likes: 0
From: South Shore, MA
Just went out and probed around a bit with the test light. I found one of the blue/yellow's was 'hot' and the other wasnt.
I applied 12v to the dead wire: nothin'. I wired a temp (12v source) switch up to the wire. Tomorrow I'll re-load my PCM with my SCT handheld, drive for a 1/2 mile or so, then try the switch. I think it's worth a try. To rule it out, at least.
I applied 12v to the dead wire: nothin'. I wired a temp (12v source) switch up to the wire. Tomorrow I'll re-load my PCM with my SCT handheld, drive for a 1/2 mile or so, then try the switch. I think it's worth a try. To rule it out, at least.
Elder User
Joined: Feb 2006
Posts: 765
Likes: 1
From: Eastern Ohio
How can the PCM tell if a PTO trans is installed? PTO and non-PTO transmissions have the exact same electrical connectors as far as I can tell. The only difference that I know of is with the Turbine Shaft Speed Sensor, which is a different length for PTO units. I wonder if there is any way for the PCM to distinguish between the two sensor types and that is how it can tell which trans type is installed?
I couldn't the tooth count, but did find this on fleet fords site.
(4) 4R100-PTO logic in the PCM is “forgotten” with loss of vehicle battery electrical power. To remedy,
a sensor in the transmission needs to count the teeth on the PTO drive gear.
a sensor in the transmission needs to count the teeth on the PTO drive gear.