91 accord problem
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Joined: Sep 2004
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From: benicia, ca, 94510
91 accord problem
hi all im new here i got a few hondas, 97 civic,2002 rsx,and 91 accord well lately in my 91 accord auto with 240,000 miles on it the green S light isflashing when it gets hot, when that happends my car looses ALOT of power 
i also noticed that my car wont down shift when i step on the gas,only when the S is flashing this happends, ive given it a tranny service but still not fixed,if someone can help that would be great 
i also noticed that my car wont down shift when i step on the gas,only when the S is flashing this happends, ive given it a tranny service but still not fixed,if someone can help that would be great
Joined: Apr 2004
Posts: 268
Likes: 3
From: Fayetteville, NC, 28304
Re: 91 accord problem (FITaccord)
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 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
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xid002
Honda Accord (1990 - 2002)
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Jun 5, 2008 05:13 PM