Diagnosing electrical/transmission problems...

[EricHughes]

I've got a 93' 240x auto that I'm having a problem with. Occasionally it won't shift out of first. I've taken it to a couple of different shops and the general consensus is that the mechanical condition of the transmission is fine. The first thing I want to do is verify 100% that the transmission controller is NOT trying to open the solenoid... once I do that I can verify that it is electrical for sure. So with that thought, does anyone have a wiring diagram of the transmission controller to solenoid circuit? I want to backprobe the appropriate solenoid and see if it’s getting voltage when the problem occurs. Thanks in advance.

[incubus_182_1693]

Please update me on the progress that you are having with this,because I am having the same problem. I have been told that it has to be electrical, and that nothing is wrong with the transmission it's self, but recently I was told that if something is wrong with the transmission, it could be sending the wrong signals to the electronics, making it seem like it is an electrical problem. I have tried nearly everything to fix it "electrical", so i think I am just going to put in a new transmission.

[s13sr20chris]

there you bros. are you refering to the pressure solenoid or the shift solenoid?

[NISTECH]

answer is near the end

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