Repairing a Dead DODGE RAM JTEC PCM with no communication - Board level electronics repair

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[@stevepark5504]

Nice touch with the BFH

[@velvetypotato711]

So what component goes bad on these if there is a P1765 transmission relay code ?

[@advancedleveldiagnostics]

Great job, Thanks! I wonder if you can learn from this that if it has 5 volts but only pulling 200ma then it's the secondary processor and if no 5 volts then it's the main processor?

[@ecurepair]

I would still lay blame to the main processor first if 5V is present. Its second most common failure behind power chip . If there is no 5V then the power management chip is usually bad. If its the 6800 is shorted bringing the 5V down you'll know cause it will be hot as hell and likely putting your supply in CC mode.

[@advancedleveldiagnostics]

@@ecurepair Thanks. Do you know of any proper training I can take on Board repair? I have the tools and got pretty good at soldering but don't know anything about Diagnosing the problem and all the different chips, etc.

[@ecurepair]

@@advancedleveldiagnostics I do not sorry, I taught myself everything. Lot of reading and study of basic electronics. Even today I still study a lot.

[@advancedleveldiagnostics]

@@ecurepair I figured, but it was worth a shot😀

[@Pauly__D]

Was wondering if you could give an opinion on a dodge I'm working with . I'm at my wits end on an 07 ram 5.7 , only have 1 code 1279 , no start condition , have signal from pcm to tipm , no starter output voltage from tpim (i believe it is c9-pin2). Not much info to go by figured id see if maybe its something common you have run across before . Have good comms and cant seem to find anything else at fault . Tried swapping out the TIPM with a used unit but same outcome . Not sure what direction to go . Love your videos , i've watched pretty much all of them . Thanks

[@ecurepair]

I'd hate to give you bad advice. I dont know much about diag while stuff is on the vehicles but I would check live data to see if the Skim/WCM is sending the start command when key is turned, if it is and tipm was replaced with same outcome then its possible the driver in pcm is at fault. If the Skim/WCM is not sensing the start command, then its possible the plastic ignition switch is faulty and not making contact for start command or possible the skim could be at fault tho the metal key type are usually pretty solid. Once long ago, I had a tech working on a Nitro. Same symptoms, no start command. They replaced and had me program the TIPM first, Then PCM and Finally the SKIM. Still the same DTC in skim (i forgot what it was sorry). Turned out there was some issue with the battery, I guess some type of internal short. It was showing as somewhat good voltage so no one really paid much attention to it. Eventually I guess they put another to do some testing and after replacing it all the problems where gone and it cranked like normal again. I would like to mention, the bad battery had been disconnected and reconnected several times so it was not an issue of anything getting reset from disconnecting it.

[@Pauly__D]

@@ecurepair Thanks for the assist . From your reply - "It was showing as somewhat good voltage so no one really paid much attention to it." This is what I went after . Testing both tipm units on the bench reveled they were in good working order . I found that on the truck the tipm seemed to "go to sleep" so i began to hunt for some type of voltage deviation . I eventually found one that seemed about 1/2 volt low , i'd have to look at the wiring diagram again but I believe it was related to the brake light circuit . Turns out it was a partially corroded wire that could carry most of the voltage but when loaded by ignition stuff via the key it would fall on its face . So at the end of the day lack of current to a portion of the tipm was the issue because of the state of the wire . O , and the wire was of course buried deep inside a huge harness . Based on the condition of the rest of the harness/wires I'd actually be willing to bet this issue was created when the harness was built at the factory . A perfect 1/2 inch slice peeled open like a banana from corrosion in the middle of a harness that looks otherwise perfect . Tricky diag but its down the road now . I have some other questions regarding bench testing but I'll leave that for another time . Thanks again for your input .

[@ecurepair]

@@Pauly__D Nice job on that one! Sounds like it was probably a PITA to have to track that down.

[@call_me_danger]

The big question is do you have any tips for removing that silicone type potting material?

[@ecurepair]

Nothing special, just slow and steady. Use wooden or nylon tools.

[@call_me_danger]

@@ecurepair yeah, I was hoping something had come along in the last 15 years that made it easier lol. Thanks.

[@NathanMayabb]

How much you take to check out computer on 02 Cummins. If interested how can i get ahold of you thanks

[@ecurepair]

keyworks.us/ramecu9802.html

[@06ralmo]

Where can i find the replacement chips?

[@Izzabumminz]

Lmk if you find

[@arielsanchez1760]

Where to buy main processor chip

[@arielsanchez1760]

Also buy the other small chip

[@johnmckinney5173]

Bro you able to pull some pics from a Samsung galaxy s7 or s6 can't remember but it's in my safe it was a phone I had bought len for my ex girlfriend and it's got a bunch of baby pictures on they're from our daughter I've been trying to retrieve... there's also a couple minute video of several ufos I got over wanapum dam in wa state.... I can pay cash app or whatever and send phone off... I've saved this phone since like 2015...

[@ecurepair]

Sorry I dont know much about phones. You'll prob need a data recovery guy to take care of that