I am having problems with my automatic transmission and I'm pretty sure it's the computer. Pickup is VERY slow and only improves if I manually shift with teh shifter, not to mention that the light is stuck on D4.

Where is the computer for the transmission located? (the car is a 1992 4 door Accord LX)

Thanks!
Joe

 

under the pass side carpet

 

Do a search for the topic: TCMs for sale.
In that thread I show you not only where the TCM is, but how to check for codes and even how to spot a bad TCM.

 

Doesnt the ECU control both the engine + tranny? or does the auto have an additional computer?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TOP END MS &raquo;</TD></TR><TR><TD CLASS="quote">Doesnt the ECU control both the engine + tranny? or does the auto have an additional computer?</TD></TR></TABLE>

OBD1 cars have two different modules.

 

Thank you!
(at the time that I posted, the search engine was down)

 

Are some of the TCMs located under the Driver Side steering column? I have some sort of electronic 'box' labeled TCM under the dash on the drivers side.

W

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JoeYu &raquo;</TD></TR><TR><TD CLASS="quote">Thank you!
(at the time that I posted, the search engine was down)</TD></TR></TABLE>

OK, here it is:
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 passender's side (just below the glove compartment) 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. If this is the case, I can rebuild it for you.
Email at cmrvi1@yahoo.com and I'll give you 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




Modified by cmrvi1 at 12:37 AM 7/13/2004

 

I HAVE BOTH PARTS IF YOU NEED THEM, I DID A H22 WITH A MANUAL SWAP, LET ME KNOW OR E-MAIL ME

SNAVE24@NETSCAPE.NET

THANKS
SHANE

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wow0609 &raquo;</TD></TR><TR><TD CLASS="quote">Are some of the TCMs located under the Driver Side steering column? I have some sort of electronic 'box' labeled TCM under the dash on the drivers side. </TD></TR></TABLE>

TCM = Transmission control module. That is under the carpet on the passenger side. The only things that come to mind under the drivers side are the cruise control module and integrated control module that controls the wiper delay courtesy light etc.