I opened it up, and the board looked clean. All of the other symptoms
were there though, so I ordered a reman TCM. That solved my problem,
but now I has some odd new symptoms - revlovling around harsh, late
shifting. The new D4 light isnít coming on at all now either, so Iím
going to send it back for another. At least I know now that the
innitial problem was indead the TCM.
> You can't "lean" towards anything. You need to get the thing
> looked at
> properly or risk spending tons of cash for nothing. A
> competent shop needs
> to do pressure checking and other things to narrow the problem
> There are three things that can cause your symptom:
> 1) Modulator valve stuck
> 2) 1-2 shift solenoid stuck
> 3) Clutch pressure control valve stuck.
> Unfortunately, in my experience, there aren't many competent
> shops; my own trouble shooting analysis via symptom logic is
> better that what 'mechanics' will do.
> The last time I had a shop troubleshoot a vehicle (against my
> own good judgement), the bill ran up to $3600 for an 89 RX7!
> Had a minor enginefire (caused by an Autozone alternator), so
> insurance had me take it to the dealer. Shouldn't have been a
> big deal; I could've done it myself, but State Farm was
> footing the bill... The dealer couldn't get it right. The
> first time I picked it up it had no power, so I took it back.
> I told them that I though it seemed ignition related. So,
> since I'm just an ignorant yahoo, they started their
> "diagnosis", and ended up replacing the injectors, ECM,
> trottle position sensor, etc... after months of picking it up
> and taking it back, I finally said 'screw it' and ordered an
> ignitor off of ebay for $20. Plugged it in and the car was
> Then, a few months ago, my manual trans in my Isuzu Trooper
> went south. I sourced another one, and had a
> [i:b3836c8f93]transmission[/i:b3836c8f93] shop do the swap
> because of time restraints. I got it back and after fixing
> some other issues with thier installation (improperly
> installed shifter, poorly bled clutch), I got pulled over
> because my reverse lights were on... so I crawled under it and
> discovered that the reverse sensor was connected to the second
> gear connector and visa-versa... I also discovered that the
> wiring was routed wrong, and some of the wires were in a bind.
> Then, wile working on that, I discovered that the wiring loom
> was routed inside of the heat shield, and had been burning
> against the exhaust manifold!
> So hopefully now you can see why I am reluctant to just turn
> it over to a shop....
> Anyway, I tried to pull codes last night, and the D4 light
> wouldn't flash, it just stayed on. I pulled the fuse to reset
> the TCM; light went off, tranny operated properly again.
> Thurned the car off, then back on, and the D4 light was back
> on, and stuck in gear...