92 Honda Accord d4 light on tran in 2 gear!

Hello guys.
I have a 92 Honda Accord. A couple weeks ago i started having a problem in which my car would all of the sudden get stuck on 2nd gear. No matter even if I floored the pedal. This was not always though. It happened randomly sometimes when I would start the car, other times in the middle of my trip, and would the problem would last from 1 minute to 15 minutes or more. I soon noticed that when this happend, my d4 light would flash once, then get really bright, and remain on no matter what gear i would change to. So even if I put it in reverse, the d4 light would be on. While this happened my car gets stuck in 2nd gear. Anyways, i was told to check the tcm for any burnt transistors and i did but found none. However, when i checked the Ecm, it did have a burnt transistor. Do you guys think this could be the problem?

 

This is a common problem with cars this age. I replaced the whole
transmission before it was finally figured out what the problem was.

Take it to a professional transmission shop....not one of the mom and pop
ones and have them check the wiring harness between the tcm and the
transmission. It's very likely there is a short on at least one of the
wires between the two.

After I'd spent about $1300 on a used transmission and a used TCM and the
asociative transmission modules, the real fix turned out to be less than
$100.

Good Luck.

in which my car would all of the sudden get stuck on 2nd gear. No matter
even if I floored the pedal. This was not always though. It happened
randomly sometimes when I would start the car, other times in the middle of
my trip, and would the problem would last from 1 minute to 15 minutes or
more. I soon noticed that when this happend, my d4 light would flash once,
then get really bright, and remain on no matter what gear i would change to.
So even if I put it in reverse, the d4 light would be on. While this
happened my car gets stuck in 2nd gear. Anyways, i was told to check the
tcm for any burnt transistors and i did but found none. However, when i
checked the Ecm, it did have a burnt transistor. Do you guys think this
could be the problem?

 

Do any of you know how I can check if my tcm to transmission wiring has a short myself?

 

The TSB suggest locating and replaing a bad capacitor. If need more info,
will try locating TSB (tech srvc blltn). Did you mean `how can I check for
an open (cut) between ECM and TCU (trans cntrl unit)?`

Does the problem goes away when ignition turn off then on?
Indi

 

Yeah, but my bad transistor is not on the tcm, tramission control unit, but on the ecm, which is the car computer i believe. Do you think this could be responsible for the car on 2nd gear issue. I think it might no be because the problem is temporary, and sometimes click on and off. So might be right in saying that it might be a short between the cables from the tcm to the actual transmission. But my questions is if there is anyway that i could check the cable for shorts myself?

 

I have a very similar problem. 13 months ago the D4
light flashed, then the engine raced and it didn't want
to get out of 1st gear. 2 weeks ago D4 light flashed.
Turning the engine off then restarting seemed to fix it.
Now I can drive for about 15 minutes before the engine
starts racing and the car won't shift up. No D4 light
flashing this time. Turning the engine off then on fixes
it for 10-15 minutes. From other internet posts, I
suspect: 1) Transmission Control Module 2) Transmission
speed sensor (but the speedometer seems accurate, it is
not erratic) 3) Selenoid in the shift handle 4) Wiring harness to the TCM. Does the fact that turning the engine
off then on point to the TCM as opposed to the others?

Thanks!
Dan

 

"easleydan"

My opinion most likely points to the circuitry in the TCU. Also might,
emphasize might, be the main relay. Under test, I'd noticed having a bad
relay will cause a shifting symptom.

 

I've had this problem. There is most likely a short in the wiring harness
between the TCU and the transmission. Get that checked first before you
waste the money on a new TCU or transmission.

TCM. Does the fact that turning the engine

 

I bought a used TCM and it still has the identical problems. Either both TCMs failed identically, or it is another problem. Where do I find the "main relay", what part do I search for at auto parts sites, and how do I change it? Thanks a bunch!

 

I bought a used TCM and it still has the identical problems. Either both TCMs failed identically, or it is another problem. Where do I find the "main relay", what part do I search for at auto parts sites, and how do I change it? Thanks a bunch!

 

Who can check a wiring harness? I hesitate to go back to the dealer, since the dealer charged me $800 to fix the identical problem 13 months ago. I'm also puzzled that it could be the wiring harness since turning the engine off then on seems to fix the problem for a few minutes.

Thanks!
Dan

 

Who can wrap at < 80 columns? The world wants to know.

 

Dan:
1) As you are sitting in driving position, it is behind the dash above your
left knee.
2) 92 honda main relay.
3) Small hands are a big help.
-Steve