4L80E Build Instructions
4L80E Build Instructions
Now about the build instructions, step H is to build the circuits for SwC (EGT3) and SwA (EGT4). The photo and instructions show to build in EGT1 rather than EGT3. Is this correct? Since there is no circuit in EGT3, SwC would not read properly causing my problem, correct?
If the instruction is wrong, could I move from amp 25 to 24 and install jumper from EGT1 to AD3 to correct?
Silverado
Re: 4L80E Build Instructions
Sorry for the mistake, it is suppose to be built in EGT3 and I mistakenly built it in EGT1. You should be able to jumper EGT1 to AD3 to correct it . I will have a corrected photo up loaded in a couple of days and corrections to the instruction.
Dave
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Re: 4L80E Build Instructions
Thanks for the correction, I will update the manual shortly (I see the confusion is caused by the EGT circuits being arranged 2341 rather than 1234 as most would expect). And many, many thanks for doing the 4L80E docs in the first place, the 4L80E build manual wouldn't have happened at all without you!
Lance.
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Re: 4L80E Build Instructions
The corrected document is here: http://www.msgpio.com/manuals/mshift/4L80.html You may have to refresh your browser (often Ctrl-F5) if you have visited this page recently.
Lance.
Re: 4L80E Build Instructions
So, should I unsolder the 4 components from EGT1 to build the EGT3 circuit, or can I connect switch A to pin 24 on ampseal connector and jumper AD3 to EGT1 with a wire on the 25x2 header?
For the moment, I did not tested the transmission, I will finish it at the end of the week, but I hope to finish everything and test it in 10 days.
Regards
Guillaume
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Re: 4L80E Build Instructions
You can just jumper the EGT1 circuit to the appropriate processor pin (AD3) on the 25x2 header (and use the Ampseal pin #24 for Input 3 == switch C), if you wish.
Then the code will work fine.
Lance.
Re: 4L80E Build Instructions
In fact, I just saw I had enough components in the kit to build a 3rd EGT circuit, so I soldered all the components on EGT3 and let the ones I soldered on EGT1.
Then I can use the right inputs on the main connector and not make any mistake.
Re: 4L80E Build Instructions
Believe that I found another error in the 4L80E build instructions. For the input speed sensor section "I" for VR3 circuit calls for a resistor in R62 that is part of VR4 circuit. This should be in R61.
Silverado
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Re: 4L80E Build Instructions
I will have a look (you sound right to me!) and fix up the docs, thanks!
It sure helps having people look these over as they build units, it's the only way to get all the bugs out (the MegaSquirt assembly docs took years to get all the errors out).
It's also one of the reasons why supporting new transmissions isn't trivial, there's lot's of information to be gathered, sorted, written down, and verified! Compared to that, making code and hardware changes is pretty straightforward.
Lance.