I have had my 90 Accord in the dealers shop along with many other shops that no one seems to see my problem but me. when my car wants it will shift into sport shift like i have pressed the button in on the shifter. which of course runs my RPMs up and my mileage way down. also I am unable to take off without a strain on the motor unless I manually shift into low. I have changed out the shift button , serviced Tranny and checked all connections thinking its a short. This is now doing this every day. any help is so much needed. Thank you for being here!

 

" 1990 Accord 4 speed Automatic Sport shift"

Wow, the 05's are kicking it off the right way.

 

i was really hoping dustin would have closed membership

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UCBGSR &raquo;</TD></TR><TR><TD CLASS="quote">i was really hoping dustin would have closed membership </TD></TR></TABLE>

me too. *shrug*


I dig the new avatar

 

yeah, ken bitched at me and told me to get a new one

 

As many of you are aware, early 90's Accords regularly have transmission shifting problems (eg. S light flashing or on steady, D4 light flashing, trans takes off in 2nd gear). The most common cause of this is a burnt out TCM.
I have been rebuilding these computers for quite some time now and have some in stock ready for shipping, or I can rebuild yours.
For pricing, or more information, please email me at: cmrvi1@yahoo.com

Below is some info on how to check for codes, TCM location, and most IMPORTANTLY, how to check your TCM.


Behind the right hand corner of the dash on the passenger's side (just below the glove compartment, or sometimes stuffed behind the kick panel) you will find 2 connectors taped to the wire harness with blue tape ( unless someone previously removed the tape). One is a three wire connector (data link connector) the other is a two wire connector. By jumping the two wires on this connector, you check for engine and transmission codes.
With the ignition switch off, connect the two wires together. Have a pen and paper handy. Turn the ignition switch on. The S light (or D4 light if your car doesn't have the S light) should start to flash a code. Might be a combination of long and short flashes. A long flash stands for 10, and short flashes are 1. For example, if the light blinks: long-short-short-short, then that is a code 13. When you find out what code it is, post it and I can tell you what is going on. BTW, 90-93 Accords have a bad habit of burning out the trans computers. So sometimes you won't get a code. The light will just stay on steady when you jump the connector.
If the light doesn't blink when you jump the connector, then your TCM (transmission control module) might be bad.
To verify this, remove the TCM ( it's located under the rug on the passenger side) bolted to the firewall. You will find two modules bolted to one bracket. The TCM is the smaller of the two, on the right.
To remove it, you'll need to remove the 4 bolts securing the bracket. Then, unplug both computer modules, and gently remove the bracket.
Next, unbolt the TCM from the bracket.
Remove the four screws that hold on the cover.
Look at the board carefully. If it is bad, you will find a burnt out resistor and a leaking capacitor. Again, LOOK CAREFULLY. Yours might not be as bad as the one in the picture, and only one of the resistors will overheat and turn slightly brown. If this is the case, I can rebuild it for you, or sell you a rebuilt one.
Email at cmrvi1@yahoo.com for more details.


This is the TCM



With the connector pointing down, the bad spot will be in the lower right corner



This is what the damaged part looks like up close

 

I want to Thank you ! I have had the dealer tell me that there was no problem with the TCM. Pulled it this morning and just like you show here (little different than pic ) but a cap was leaking and board burnt! dealer replaced it this afternoon and i will pick it up tomarrow. thanks again for the info on what to look for myself.

 

Glad to be of help , but if you got that TCM from the dealer, you paid wwwaaayyy too much.
My rebuilt units are 1/5th the cost of that dealer unit, and have a 2 YEAR warranty.

 

Please send Price info to my email addy , I dont think they put in the right one. now my sport shift is doing nothing but its driving and shifting great. just no Sport shift.

 

I think I am having the same problems. I will check my board, but can you send me a price on a new TCM

 

yea i had the same prob on my 91 accord lx....it's sold now though...thats good to know though in case i ever get another 90-91 accord...thanx

 

Thanks for all the info, I will pull the TCM and crack it open to see if I need repairs.

Also, can you change shift points and such? As in to make it perform as a chip does OBDII cars?

Thanks
ccarver

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ccarver &raquo;</TD></TR><TR><TD CLASS="quote">Also, can you change shift points and such? As in to make it perform as a chip does OBDII cars?</TD></TR></TABLE>

No, I only do stock rebuilds at the present time, but if you have a 90-91 Acc with the S button, that's basically what the Sports Mode does.