Continuous code 512
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Laughing Gas
Joined: Feb 2015
Posts: 765
Likes: 1
Continuous code 512
Truck died when I went to lunch. Probably fuel pump haunting me again, so once I restarted and drove back to work I checked codes, got 512 in continuous memory. I just had the EEC harness open last month when I put the ignition resistor in, is it possible I jiggled a wire and triggered the code? Either way I gotta pull the PCM out and look inside, see if anything's messed up in there ... anything else might cause this code to set?
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Laughing Gas
Joined: Feb 2015
Posts: 765
Likes: 1
Edit: I have repeatedly tried clearing the code, IT KEEPS COMING BACK! I even disconnected the battery and it still sets as a continuous code! WTF?
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Laughing Gas
Joined: Feb 2015
Posts: 765
Likes: 1
Will crack open my case later.
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Laughing Gas
Joined: Feb 2015
Posts: 765
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Hey guys, I just got a Cardone remanned PCM. I have not installed it yet, I got it as a 'just in case'. I opened the unit and Im not sure this thing will be ok ... Attached pictures, this is the NEW one, not my original. What do you guys think? My worry is the soldering on the capacitors ...
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From: Central Mississippi
Looks exactly like the (nasty) one I got, but it worked.
Long enough for me to get my original fixed & re-installed.
It now lives on a shelf as a spare.
(On edit, I had a boat load of 512 codes too)
Long enough for me to get my original fixed & re-installed.
It now lives on a shelf as a spare.
(On edit, I had a boat load of 512 codes too)
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Laughing Gas
Joined: Feb 2015
Posts: 765
Likes: 1
Alright guys, I'm 99% sure I fixed it. Story time: I disconnected the PCM connector and performed power tests. Pin 1 to Pin 40/60 showed a rock solid 12.6V and no loss of signal when flexing the wire harness. I busted open the old PCM and found problems. Blue powdery crap under the capacitors ... I decided to try the Cardone unit even though @rla2005 thinks it is junk (no offense dude, it looked iffy to me also). Installed the new PCM. Drove the truck for a good 30 minutes, no problems there. Rechecked codes when I got home, got 111 for On and Continuous. 
I am hanging onto the old one just in case but in the meantime, problem solved.
I am hanging onto the old one just in case but in the meantime, problem solved.