does the FWD time out?

YourConfused · #1 03-03-2008, 05:40 PM

So my nice new trans has a bad solenoid C. I put the FWD fuse in it to diagnose it and it works for a bit. Then the FWD light goes off and the binding is back.

Is it timing out?

I don't really know much about this circuit.
Sometimes it won't even turn on when starting the car so I have to turn off the car and re-start it in hopes of getting FWD to come back on. I checked the contacts and found that there was just light contact on one of the the fuse blades, so i shimmed it w/ a thin piece of aluminum foil. Didn't help any.

Any ideas?

p.s. 4.44 fwd is not very safe, especially in the rain

TomsSVX · #2 03-03-2008, 06:13 PM

thats a very similar issue to what my old Teal car had... Never did figure it out before I sold it. Latest and greatest idea after great amounts of troubleshooting and new parts was to drop the valve body and look for a pinched wire somewhere... Time to break out the multimeter and start testing the circuit from the TCU to the solenoid itself

Tom

Trevor · #3 03-03-2008, 06:43 PM

Quote:

Originally Posted by YourConfused

So my nice new trans has a bad solenoid C. I put the FWD fuse in it to diagnose it and it works for a bit. Then the FWD light goes off and the binding is back.

Is it timing out?

I don't really know much about this circuit.
Sometimes it won't even turn on when starting the car so I have to turn off the car and re-start it in hopes of getting FWD to come back on. I checked the contacts and found that there was just light contact on one of the the fuse blades, so i shimmed it w/ a thin piece of aluminum foil. Didn't help any.

Any ideas?

p.s. 4.44 fwd is not very safe, especially in the rain

Inserting the fuse will cause the valve to receive an electrical signal, but there could be a non electrical fault which involves a delay before it registers.

According to the manuals the diagnostic system is quite sophisticated and will register an obstructed, sticking, or mechanically faulty solenoid valve. This can be achieved by sensing the inductance of the solenoid.

If your transmission is nice and new, is it not under warranty?

YourConfused · #4 03-04-2008, 08:02 PM

Looks like I just have a bad case of car suck!

YourConfused · #5 03-05-2008, 09:27 PM

Talked w/ LAN tonight and he doesn't have any info to help out. Anyone have some info or schematics of the circuit? I don't have the money, time or ambition to throw parts at this issue. Well basically the last thing I want to do EVER is just throw parts at a problem, so info would be appreciated.

LAN states that this problem has nothing to do with the trans I bought from him, therefore there is no issue of warranty involved. After talking with him several times I am getting the impression that he is trying to be honest and isn't just avoiding the issue.

I think I am destroying my trans mount when it does bind and am considering just welding the stupid thing solid if it does tear. This binding issue is really annoying, as is the lack of traction of fwd. Can binding of the center clutch destroy something else on the car??? I hope not.

Where is the quick and easy fix when I need one?

TomsSVX · #6 03-05-2008, 10:08 PM

Like I said. You need to trace the signal wire for the Sol. C all the way from the TCU down to the transmission with the FWD fuse in (test when it is not working). You should have a 12v constant signal going to it... You need to find out where it is grounding out... My guess is a pinched wire in the transmission. Best way to check is, disconnect the transmission plug (the bundle going into the driver's side of trans) and test the sol. C signal wire to see if has voltage. Remember, you need to test all of this while the car is on and the FWD fuse is not working (meaning it is installed but the light on the dash is out). If you have anymore questions let me know

Tom

TomsSVX · #7 03-05-2008, 11:06 PM

Just had another thought... Try testing for continuity between the signal wire and the transmission case... If it is grounding out, there should be resistance between the signal wire and the case

Tom

Merz · #8 03-05-2008, 11:34 PM

My transmission does the same thing. The FWD light shuts off occasionally while i am driving and i start to get the binding. I just push it into neutral and turn the key off and on and it usually goes back into FWD. I'd like to get it fixed though. Hopefully you'll find the problem. Keep us posted.