cmrvi1

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.
Below is some info on how to check for codes, TCM location, and most IMPORTANTLY, how to check your TCM.
If you need to get a TCM, please click on this link:
https://honda-tech.com/zerothread?id=1174484
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.

]This is the TCM[/B]



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 12:26 AM 12/10/2004


Modified by cmrvi1 at 12:28 AM 12/10/2004


Modified by cmrvi1 at 12:54 AM 12/30/2004


Modified by cmrvi1 at 11:37 PM 3/9/2005

billelaine

Just bought and received delivery of a TCM from Carlos. Service was great, answered a few questions I had and promptly shipped the TCM. Installed it and it worked perfectly. Price and service were great, would not hesitate for a second to order from Carlos again
Bill