Should i try and rewrite the stock file? I did read it with and without the t42 just too have a comlplete with and without tcm.
Should i try and rewrite the stock file? I did read it with and without the t42 just too have a comlplete with and without tcm.
Thanks, Tody
Well its fu#$ ed up now. Detect protocol whatever thre hell it is. FML
Thanks, Tody
Thanks for all the help from everyone. I am going to look at my options and decide what to do. Again thank all of you for taking the time out to help me.
Thanks, Tody
When you removed the TCM did you jumper the CAN lines back together? 6 to 37 & 7 to 38?
I took it out completely unhooked everything going to it and ran the gmlan wires to the diognostic port. Then tried to write it and went to 51% and couldn't find anymore wiring issues because i bypassed the car fuse box and went straight to battery with switch to the switched power. When that wouldn't work i decided to make a bench harness to make sure it wasn't wiring or anything in car losing power. My power supply is a model SL-11R 13.8 volts 7 amp continous 11 amp at 50% duty cycle transformer. Only thing on it was the pcm.
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My thinking was the tcm OS issue we kept going back to was the issue and i wanted it out the equation all together hoping it hadn't messed up anything already.
Thanks, Tody
What's the service number of the PCM? Is it posted somewhere?
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Try reading the existing file, followed by immediately writing your desired file. If it will read but not write on the same setup then I would think there is a problem with the write file. If it won't read, likely a problem with the ECM or the wiring.
I'd try reading it and then doing a write entire with an unmodified file. Read it out and write entire without changing anything.
EFI specialist
Advanced diagnostics, tuning, emissions
HPtuners dealer and tech support
email=[email protected]
Thr service number is 12597121.Originally Posted by edcmat-l1
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Just as a side note on programming. I personally don't like using power supplies of any kind during programming. I will always use a nice charged Optima I have as a jumper. GM says that the ripple that chargers put out causes programming issues. I personally have done thousands in my decades as a GM dude. Never had a problem but then again I don't use a charger unless it is GM's one specific for programming.
Battery chargers do things, on purpose, because they are battery chargers. Power supplies don't, as long as they aren't cheap garbage. Some better battery chargers have a power supply mode/setting where they can be forced to not do the weird charging algorithm stuff and just do plain constant voltage until you tell it to stop.
When I got a new DSO about 10 or so years ago we had a charger that wasn't doing so good a job at charging. Volt meter said it was good voltage. DSO had a HUGE spike in it. Had a bad diode. Ordered a new one from Mouser and bam. Started to charge great. If I hadn't use my DSO no one would have known it was messing up batteries.
It won't read it but when you try to write entire it will start and go to 10-30% then time out. The first one i messed up won't do anything. The other couple one goes to detect protocol one time and read it the second time. I have the diagnostic port wired up 4&5 to ground at wire 13. I have 12v at 16 and 20. The switched 12v is 19 and 47 and gmlan at 6 & 14 and 27 &28. I have the resistor and between the two data wires on the dtc port its getting 60 ohms. All on J1 plug. I don't know why it times out. I bought a new cable and it won't read the interphase with it or my good cable for my night vision scope, i figured it would be the best since it's a data cord and not just a charging cord. When i got this MPVI3 the cord it came with wouldn't work either not sure if that means anything but figured i would let yall know everything. Also when i'm trying to log my truck it will cut off all the time i just figured it was the plug on the truck.
Thanks, Tody
Ok i moved the dtc port grounds to 13 alone and hooked the ground #73 to ground on the power supply and write entire to the stock program without the tcm i had and it wrote the whole thing went to 100%. I then cut the 12v switched off but left the 12v batterey on. I haven't done anything else kinda scared to. What should i do now?
Thanks, Tody
In the passkey section in top left what type of relay is that? Does GM just put the X threw the electromagnetic part instead of /, I see it's not a diode but making sure it's a normal relay and not something i haven't noticed before.
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Looking at this on my phone so may be missing it, but I don’t see passkey anywhere,
My bad it says ecm tcm easykey where the B+ comes in.
Thanks, Tody
That's just the name of the fuse in the OEM fuse box.
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