Re: A/T skipping 1st gear

"Charles" <electrochuckREMOVE@[EMAIL PROTECTED]
> wrote:
> No, that's probably within limits. Apparently they replaced a good 
> solenoid
> assembly. Sorry. What is the accuracy of your ohmmeter?

I haven't calibrated it. I need to find a resistor with known value and 
see.

> The range of
> acceptable values for my old '88 Prelude transmission is 12 to 24 
> ohms. When
> my solenoid went bad both coils measured about 900 ohms. Does your 
> Accord service manual give the tolerance? (It may be buried in the 
> troubleshooting chart.)

It is also 12-24 ohms.

> At the low end of the range, your ohmmeter may be off. I wouldn't 
> worry about 30 ohms. I _would_ be concerned if it was 300 ohms.

It's an old digital Micronta multi-meter I have mostly been using for 
voltage measurement and for continuity checking. The Ohm meter part's 
scale seems to be designed to measure kilo Ohms, so on the low end it 
might not be very accurate.

> The next question is, what are the resistance readings of the 
> solenoids in the vehicle?

That's kinda' hard to get to without lifting up the vehicle. So I don't 
know if I can do that. The lock-up control solenoid would be a lot 
easier as it is closer to the top.

> The TCUs are solid. They have a lot of protection circuitry and they 
> have to withstand some wild temperature swings. The circuit board 
> components are encapsulated. You'll have a hard time killing it. The 
> external wiring is the weak link in the system.

That's sounds right though according to the troubleshooting charts a 
faulty A/T gear position switch might also cause similar symptoms. I 
guess this will have to be a process of elimination. Unfortunately, due 
to the transient nature of the symptom, after every fix attempt I may 
have to wait for weeks to know if the fix worked.

DB