Overheating then this

[bawareca]

Originally Posted by Quatro40

Hi did you see my other pics, it shows undervoltage or overvoltage at most modules. Let me know what you think after looking at those. Thanks.

I saw codes showing undervoltage and not even 1 for overvoltage.
If there is overvoltage condition the transmission computer will switch to safe mode and there will be a definitely clear code showing overvoltage.

[Doug Huffman]

Originally Posted by bawareca

I saw codes showing undervoltage and not even 1 for overvoltage.
If there is overvoltage condition the transmission computer will switch to safe mode and there will be a definitely clear code showing overvoltage.

Very interesting. I hadn't come across such in my reading. That, with the general ignorance about batteries and charging, might explain some mysterious flurries of error codes.

I really do think that most integrated circuits have input voltage regulators.

[bawareca]

Originally Posted by Doug Huffman

I really do think that most integrated circuits have input voltage regulators.

They all do. But the transmission solenoids dont have voltage regulators. At 3-4 volts or more over nominal the solenoids characteristics will change significantly.
I have had 2 N62 powered cars recently that will have similar symptoms. All is good at idle and low RPM. Once the RPM jump over ~2000 the trnsmission will go in safe mode. Having ISTA connected while driving I find the voltage to reach 18-19v. Overvoltage codes were to be found in most modules,7-8 at least.