Re: A/T skipping 1st gear

"Charles" <electrochuckREMOVE@[EMAIL PROTECTED]
> wrote:
> It sounds as though the transmission is getting erroneous signals from 
> the computer. That could be a problem in the wiring or, less likely, 
> the computer itself. I would pull the connectors off at the TCU and, 
> using an ohmmeter, check the wiring. The troubleshooting procedure is 
> in the service manual. Concentrate on measuring the solenoid 
> resistance.
>
> You'll probably see high resistance readings where you would expect to 
> see the low resistance reading of each solenoid. Then you disconnect 
> the solenoid connector at the transmission and take another set of 
> readings. If those resistances are correct, the problem is in the 
> wiring between the solenoid connector and the computer. If not, one or 
> more solenoids are defective. There are probably four solenoids to 
> check, two ****ft control and two lockup.

I don't see how this could yield any results with a transient problem as 
this seems to be. Right now all is well and who knows when the problem 
manifests itself again. That would be the time to carry out the thing 
you suggest but I may not be in a situation when I could do it.

> If you still have the old solenoids, measure their resistance. If they 
> are okay the resistance will be in the range of 12 to 24 ohms. If they 
> measure several hundred ohms or higher, they were truly bad.

This I can do now and will re****t back on it later.

> I went so far as to connect LEDs to the solenoid lines of my TCU to 
> verify that the correct signals were coming out of the computer while 
> I drove.

Great idea.

> You might even invest in the tool to read the diagnostic codes.

Well, I don't think I will keep this car long enough to make it 
worthwhile.

It just occurred to me: what if the problem is in the lock-up control 
solenoid instead? Just what is the function of the lock-up control 
solenoid?

DB