| Author |
Message |
Frf_c6
Freshman Member
Username: Frf_c6
Post Number: 1
Registered: 9-2004
| | Posted on Tuesday, September 7, 2004 - 1:36 pm: | |
Add me to the list. I changed the transmission fluid with Honda brand. Didn't work. Checked the codes using the paper clip method above. When the paper clip was touching the connector from under the passenger kick panel I got a solid check engine light. No D4 indications. What's next? Change again with Honda fluid or are one of my CPUs shot? |
Jtrelin
Freshman Member
Username: Jtrelin
Post Number: 4
Registered: 9-2004
| | Posted on Friday, September 10, 2004 - 4:56 pm: | |
Try putting in some seafoam or gunk transmission cleaner prior to the next change. run the car for a few minutes after you put it in - making sure the transmission shifts into all the gears -and then try changing the fluid again. if that doesn't work, you might need a more expensive solution. |
Travish
Freshman Member
Username: Travish
Post Number: 3
Registered: 9-2004
| | Posted on Sunday, September 12, 2004 - 12:36 am: | |
I have a 1990 Honda Accord LX sedan with automatic transmission. For the past month I have occasionally experienced a problem with the following conditions.
1) The sport mode light is lit regardless of shifter setting.
2) The mechanism which locks the shifter in park until the brake is depressed fails to operate. The shifter can be moved from park without depressing the brake.
3) P, R, N, 1, and 2 gears work as expected. D3 and D4 gear settings are stuck in second gear.
The problem occurs as soon as the car is started. In all but one case it goes away after about 30 seconds. In one case it occurred while driving and did not go away until hours later. More on that later.
I change my transmission fluid with genuine Honda ATF at least every year. It is overkill in terms of fluid life but I find that it shifts smoother with new fluid. As such I have not considered the possibility of the fluid being to blame.
I jumped the service connector pins and turned the ignition to ON. The check engine and sport mode lights on the instrument panel were continuously lit. The light on the A/T control unit under the passenger side carpet was also continuously lit. According to the A/T control unit troubleshooting procedures on page 14-37 of the 1990 Honda Accord Service Manual, "If the LED displays codes other than those listed above or stays lit continuously, the control unit is faulty."
In the case where it occurred while driving and persisted for several hours I decided to try resetting the computers by pulling the backup fuse. After doing this the problem went away and no error codes were reported. The problem came back the next day but has occurred much less often since.
I contacted my local dealer and obtained Honda Technical Service Bulletin 90-039. I have reproduced the document in the next post. It confirms that the corrective action is to replace the A/T Control Unit. My dealer quoted me $525 for a new unit so I ordered a used one found on car-part.com. I expect to receive it on Thursday or Friday. |
Travish
Freshman Member
Username: Travish
Post Number: 4
Registered: 9-2004
| | Posted on Sunday, September 12, 2004 - 12:37 am: | |
Honda Technical Service Bulletin 90-039
Model: 1990 Accord
Issue Date: Dec 7, 1990
"S" Indicator On, No Downshift
SYMPTOM
The "S" light is on and the transmission is stuck in third or fourth gear. The LED on the A/T Control Unit says lit, and will not blink an error code. The interlock control unit (under the dashboard above the fuse box) buzzes or clicks.
PROBABLE CAUSE
The Automatic Transmission Control Unit is defective.
VEHICLES AFFECTED
2-door up to VIN 1HGCB7...LA039050
4-door up to VIN 1HGCB7...LA121350
4-door up to VIN JHMCB7...LC104599
DIAGNOSIS
Go to CORRECTIVE ACTION if you find any one of the following indications:
1. Depress the brake pedal. The interlock control unit stops buzzing or clicking.
2. Reset the A/T Control Unit by removing fuse No. 24 in the underhood fuse box, then test drive the car. The "S" light remains off and the transmission shifts normally.
3. Removing fuse No. 24 does not clear the A/T Control Unit.
CORRECTIVE ACTION
Replace the A/T Control Unit with a new unit listed under PARTS INFORMATION.
PARTS INFORMATION
Automatic Transmission Control Unit
Japan-built EX:
P/N 28100-PX4-932
H/C 3523933
Japan-built LX & DX:
P/N 28100-PX4-922
H/C 3520269
US-built EX:
P/N 28100-PX0-932
H/C 3521796
US-built LX & DX:
P/N 28100-PX0-922
H/C 3521788
WARRANTY CLAIM INFORMATION
In warranty: The normal warranty applies.
Out-of-warranty: Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Service Manager. You must request consideration, and get the DSM's decision, before starting work.
Operation number: 218160
Flat rate time: 0.6 hour
Failed part:
P/N 28100-PX0-921
H/C 3263035
Defect code: 030
Contention code: B01 |
Travish
Freshman Member
Username: Travish
Post Number: 6
Registered: 9-2004
| | Posted on Thursday, September 16, 2004 - 7:10 pm: | |
I recevied the new A/T Control Unit today and installed it. I have not been able to reproduce the problem since installing it.
I have a US-built LX model which contained the failed part 28100-PX0-921 mentioned above. I replaced it with part 28100-PX4-922 which is for Japan-built LX models. |
Frf_c6
Freshman Member
Username: Frf_c6
Post Number: 2
Registered: 9-2004
| | Posted on Wednesday, September 22, 2004 - 12:56 pm: | |
I am pretty much convinced that it's my AT Control Unit. The one in my car is a 28100-PX0-922. Which P/Ns are compatible with that one? Thanks, Frank |
Paceman
Freshman Member
Username: Paceman
Post Number: 1
Registered: 9-2004
| | Posted on Wednesday, September 22, 2004 - 3:06 pm: | |
My daughter has a 1995 Honda Accord LX.
The D4 light (auto tranny) flashes all the time. No matter what gear the car is in the D4 light blinks. Has anyone ever heard of this? |
Paceman
Freshman Member
Username: Paceman
Post Number: 2
Registered: 9-2004
| | Posted on Wednesday, September 22, 2004 - 3:12 pm: | |
Sorry I read some more posts so I will add a little more info.
The car will shift automatically without a problem, though sometimes a little reluctantly. I can manually shift to all the gears without a problem. But that darn d4 light keeps blinking no matter what gear I am in. |
Dlemons
Freshman Member
Username: Dlemons
Post Number: 2
Registered: 9-2004
| | Posted on Thursday, September 23, 2004 - 11:18 am: | |
The S mode stayed on in my 91 Honda Accord LX. The car had a real slow take off and after having a mechanic friend of mine take a look at the car he discovered the car was not going into 1st or 4th gear. He changed the transmission fluid twice and he replaced my computer. Changing the transmission fluid and using the seafoam did not help. Therefore he changed the computer on the passenger side. This did seem to help my car it is now changing all gears however it is a hard shift and now the "S" flashing. |
Travish
Freshman Member
Username: Travish
Post Number: 8
Registered: 9-2004
| | Posted on Saturday, September 25, 2004 - 1:17 am: | |
Frf_c6: Chances are that any of the part numbers I listed in the service bulletin I posted will work. I have a US-built LX model which came with a 28100-PX0-921. The service bulletin recommended a 28100-PX0-922 (the one you have). I put in a 28100-PX4-922 (same thing only for Japan models) which worked fine. I would try finding one that is either the model number you have or the Japanese version (PX4 instead of PX0). Check <http://www.car-part.com>.
Paceman: When the D4 light is blinking the computer is trying to give you an error code. There may be long blinks and short blinks. The sequence should correspond to an error code. You might want to pick up a repair manual with this information, consult your dealer, or get the sequence of blinks and ask here. I have the codes for my model series (1990-1993) which may or may not be the same as codes for your year.
Dlemons: The S mode light staying on (not reporting an error code) indicates a failure of the computer. When it flashes it is returning an error code. Look up the code to see what the problem is. Check <http://home.earthlink.net/~michaelpkeefe/howto_codes.htm> or a service manual for more information. |
Frf_c6
Freshman Member
Username: Frf_c6
Post Number: 3
Registered: 9-2004
| | Posted on Tuesday, September 28, 2004 - 9:06 am: | |
Travish, Thanks for the info. I called the Honda dealer and they were very helpful. The parts counter computer answer is that the PX0 and PX4 are direct replacements. The cost of a new one is $615!!! |
Pawpaw
Professor
Username: Pawpaw
Post Number: 2002
Registered: 1-2003
| | Posted on Tuesday, September 28, 2004 - 10:19 am: | |
WOW Frf_c6, $615 big ones for a black box.
Sounds like a trip to a salvage yard might be in order here, as they often will let you try the part out before the purchase.
Or maybe a visit to "E Bay", to compare prices on the new one.
Just some thoughts from the sidelines.
Let us know what you find. pawpaw |
Travish
Freshman Member
Username: Travish
Post Number: 9
Registered: 9-2004
| | Posted on Wednesday, September 29, 2004 - 1:04 am: | |
I believe my dealer quoted me $550. I bought a used one for $60 from a place listed on <http://www.car-part.com>. There were some cheaper ones listed but I wanted to pay a few dollars more to get one from a place that actually lists the part number. |
Pawpaw
Professor
Username: Pawpaw
Post Number: 2008
Registered: 1-2003
| | Posted on Wednesday, September 29, 2004 - 7:55 am: | |
NOW that sounds more like it on price, did that FIX your problem???? pawpaw |
Travish
Freshman Member
Username: Travish
Post Number: 10
Registered: 9-2004
| | Posted on Wednesday, September 29, 2004 - 6:04 pm: | |
Pawpaw, I installed the new unit on the 16th and haven't had the problem since. |
Frf_c6
Freshman Member
Username: Frf_c6
Post Number: 4
Registered: 9-2004
| | Posted on Thursday, September 30, 2004 - 3:29 pm: | |
I bought one through one of the vendors on www.car-parts.com as well for $70 incl. the shipping. I received it yesterday and will install it over the weekend and let everyone know. |
Frf_c6
Freshman Member
Username: Frf_c6
Post Number: 5
Registered: 9-2004
| | Posted on Friday, October 1, 2004 - 12:40 pm: | |
Installed the new TCU last night and the problem is fixed. Thanks to everyone that posted on this thread. Frank |
Pawpaw
Professor
Username: Pawpaw
Post Number: 2012
Registered: 1-2003
| | Posted on Friday, October 1, 2004 - 1:50 pm: | |
Good feedback guys. Mailman better file this one in your favorites folder, for when your Accord begins to act out.
Looks like Honda has a problem with that pesky tranny shift control computer. Would be interesting to find out what the bad component is. pawpaw |
Jbolly
Freshman Member
Username: Jbolly
Post Number: 2
Registered: 10-2004
| | Posted on Thursday, October 14, 2004 - 8:26 pm: | |
does anybody know this 1 I jumped the service connector. on my 91 honda accord. when i turn the key. the s light gave me a code of 15. what does it mean. the problem i am having is the car shifts fine for a few miles then stops shifting at all. it just revs up. but i dont have a s light. i did before but changed the com and it fixed it. this is what gets me when it stops moving or shifting i pull over turn off the key start it back up and it works for a couple of miles. whats up with this trans. |
Travish
Freshman Member
Username: Travish
Post Number: 11
Registered: 9-2004
| | Posted on Friday, October 15, 2004 - 12:05 pm: | |
Number of LED blinks: 15
S indicator light: OFF
Possible Cause:
- Disconnected NM speed sensor coupler
- Short or open in NM speed sensor wire
- Faulty NM speed sensor
Symptom: Transmission jerks hard when shifting. |
Hondaowner
Freshman Member
Username: Hondaowner
Post Number: 1
Registered: 10-2004
| | Posted on Monday, October 18, 2004 - 2:49 pm: | |
Travish and Frf_c6,
Can you share with the board which company you had bought your TCM from?
I am having the same problem on my 1991 Honda Accord 4DR LX AT. Very slow start up speed on D4 but if I switch to "1" or "2" gear at start up then the accelleration speed is great then I just shift it to D4 to drive normally. I think my transmission is not going into 1st or 2nd gear if my gear setting is at D4 to drive. My TCM P/N is 28100-PX0-822, I am wondering if I need to get exactly that same P/N as replacement or will my TCM able to accept Travish P/N replacement. Welcome any knowledgeable comment on this. Thanks in advance for any help other my provide. |
Travish
Freshman Member
Username: Travish
Post Number: 12
Registered: 9-2004
| | Posted on Monday, October 18, 2004 - 7:45 pm: | |
Hondaowner,
I got mine from IMPORT CENTER at <http://www.goimportcenter.com/> for $60. I found them through <http://www.car-part.com/>. Search for the part there; it's under "Transmission Computer." I would try to buy one from a place that lists the part number they are offering.
I would imagine that any listed part will work. PX0 parts are from US-built models; PX4 parts are from Japan-built models. PX0 and PX4 parts seem to be interchangeable (they were in my case). If the second to last digit is a 2 it is for a DX/LX; if it is a 3 it is for an EX.
I see a PX4-822 listed for $50. I would try to get a PX(0 or 4)-(8 or 9)22. If you have trouble finding one I would try getting one that ends in an equal or greater number under the assumption that higher numbers relate to newer revisions. Oh, with the exception that I would avoid the -921 as that is the specific part mentioned to fail in the service bulletin I posted. |
Ilovehonda
Freshman Member
Username: Ilovehonda
Post Number: 1
Registered: 10-2004
| | Posted on Tuesday, October 19, 2004 - 4:55 pm: | |
This is a great Forum!!! I was wondering if anyone could help me with my 91 Accord EX. I had the same previous problem as some of the others on this site with the "S" light blinking. Before it started blinking I was experiencing rough idle when i come to a stop with the car in Drive or reverse. I found a A/T unit at a salvage yard and that fixed the blinking "S" but I still have a rough idle after the car gets warm and I'm stopped at a light etc. When I put it in N it stops but know matter if it's reverse or drive it will have rough idle at stops, and and shakes pretty hard, and sometimes it even shuts off and i have to restart the engine. I was thinking maybe I got a bad A/T unit or a gas problem. Can anyone help me with this |
Hondaowner
Freshman Member
Username: Hondaowner
Post Number: 2
Registered: 10-2004
| | Posted on Tuesday, October 19, 2004 - 7:27 pm: | |
Thanks Travis for your quick reply.
I am in the process of zeroing on a vendor to buy from. So many choices but buyer beware.. |
Captainklutz
Graduate Member
Username: Captainklutz
Post Number: 930
Registered: 7-2002
| | Posted on Tuesday, October 19, 2004 - 8:10 pm: | |
Ilovehonda...Might be time for the Seafoam tranny cure (search the forum...mentions of the stuff are everywhere; we should get a commission!)...Sounds like things might just be sticky.
You should be able to get Seafoam at one of your local parts stores. |
Ilovehonda
Freshman Member
Username: Ilovehonda
Post Number: 2
Registered: 10-2004
| | Posted on Wednesday, October 20, 2004 - 11:18 am: | |
Hey Captain thanks for the advice. I'm going to buy some seafoam and check that out. After I run the seafoam and get ready to change the tranny fluid do i need to flush or just change it. I got 289k miles on it. Also should I change the fluid and then add Seafoam or should I add the seafoam and them change it. |
Ilovehonda
Freshman Member
Username: Ilovehonda
Post Number: 3
Registered: 10-2004
| | Posted on Wednesday, October 20, 2004 - 11:43 am: | |
Is it easy to change the tranny oil?? |
Mailman
Professor
Username: Mailman
Post Number: 3199
Registered: 5-2002
| | Posted on Wednesday, October 20, 2004 - 12:05 pm: | |
Don;t want to jump in front of you Cap but this is serious.
DO NOT flush this tranny only change the fluid. Way too many miles to be flushing and stirring up possible trouble. Add the Trans Tune to your fluid, and drive per the instructions on the can, then change the fluid. It is easy to change but messy. |
Pawpaw
Professor
Username: Pawpaw
Post Number: 2063
Registered: 1-2003
| | Posted on Wednesday, October 20, 2004 - 2:25 pm: | |
Well with this much mileage on the vehicle & for ALL the reasons Mailman outlined DON'T get a tranny flush.
BUT, I would add, with this much mileage on this tranny I would opt to do, myself, or have done by a service center, A removal of the tranny pan, take a look at how much & what kind of deposits are in there.
Then clean the pan & magnet, replace the tranny filter & pan gasket, then have a COMPLETE fluid change/pump out done.
Just dropping the pan to change the filter, only gets about 1/4 to 1/3 of the old fluid out.
IMHO I think with these many miles & the seafoam in there, you need to do a filter change & a complete fluid change out.
You can do this yourself, if your handy with tools, or you can have it done at a shop with a machine.
BUT the places that do it by machine, don't usually drop the pan to clean it, the magnet, nor change the filter.
YOU must insist they do this, & it's usually extra cost, maybe $20-$50.
These are the places that will also try to sell you the tranny flush, so WATCH OUT, DON'T OPT FOR IT, IMHO!!!!
As Mailman said, add the "SeaFoam Trans Tune" BEFORE you service the tranny. Drive it some, but not hard, nor on a long trip, to let the seafoam work.
But remember, we don't know at this point just how dirty it is in there, nor how clogged your tranny filter is, so anything the seafoam dissolves will first be strained through your tranny filter.
This is another one of the reasons IMHO you should drop the pan to replace the filter, then do, or have done, a COMPLETE fluid change out.
You want to get as much crud out of the tranny as possible & begin life again with a clean filter & as much clean tranny fluid as is possible to get in there.
At this point, after having looked at how many interior deposits remain, you can make a informed decision on when you may next want to service the tranny.
WHEW!!!! didn't mean to get so long winded, but just coudn't say it any shorter!!!!!
Cap, we don't mean to steal your thunder, but as Mailman said we think this is serious & we believe he needs some imputs pronto, in case your not by the foram, so something rash isn't done!!! pawpaw |
Ilovehonda
Freshman Member
Username: Ilovehonda
Post Number: 4
Registered: 10-2004
| | Posted on Wednesday, October 20, 2004 - 3:21 pm: | |
Sorry to keep buggin! where can i find a tranny filter? |
Mailman
Professor
Username: Mailman
Post Number: 3201
Registered: 5-2002
| | Posted on Wednesday, October 20, 2004 - 3:45 pm: | |
No offence, but It appears that you may be unqualified to change the fluid, drop the pan, and change the filter. The rest of the fluid must be pumped out either with a machine or with the internal tranny pump. Save yourself the hassel and the mess and pay the pros to do this job. But as Pawpaw says, don't let them talk you into a flush. Go to a reputible tranny specialist or your Honda dealer. Stay away from Quick Lubes, Transmission Chains, WalMart and places like that. You don't want an 18 year old inexperienced kid working on your trans. Pawpaw outlined the reasons not to get a flush and why it is important to change the filter and clean the pan. I totally agree. |
Captainklutz
Graduate Member
Username: Captainklutz
Post Number: 934
Registered: 7-2002
| | Posted on Wednesday, October 20, 2004 - 8:12 pm: | |
Mailman/Pawpaw...Steal Away!  Glad you guys are around...I'm the manual tranny freak around here!
And after reading all this stuff about the Honda trannies...I'm just as glad I don't believe in 'em!
|
Mailman
Professor
Username: Mailman
Post Number: 3204
Registered: 5-2002
| | Posted on Wednesday, October 20, 2004 - 8:49 pm: | |
Yea it seems there is a rash of Honda A/T problems. I have personally never had a single problem with my four but I have never put a ton of miles on one either. I suspect that alot of these problems could be avoided if they were maintained properly. The only other fluid in most cars that is neglected more than the tranny fluid is the brake fluid. I have been guilty of this myself in the past. I learned my lesson the hard way years ago. As the old commercial once said, "Pay me now or pay me later". Neglect a system and it will eventually prematurely fail. |
Akdubuque
Freshman Member
Username: Akdubuque
Post Number: 1
Registered: 10-2004
| | Posted on Monday, October 25, 2004 - 5:30 pm: | |
Okay, I've got a '91 Accord LX. I'm having the flashing 'S' problem, but there are a few things mine's doing that I haven't seen on the board so far. I first noticed a high pitched grinding/squeaking that sounded like it was coming from the right front wheel, or just that area. Eventually the 'S' started flashing, it does it in all gears including reverse. The noise has disappeared but now the speedometer does nothing. Everything else in the dash display appears to be working fine. Any advice? Also, I need to know if it'd be advisable to drive it 70-80 miles back home or get it repaired up at school (I'm in college). I've got 169409 miles on it. Thanks ahead of time for the advice. |
Guitar87guy
Freshman Member
Username: Guitar87guy
Post Number: 1
Registered: 10-2004
| | Posted on Tuesday, October 26, 2004 - 3:49 pm: | |
Same problem....'91 Accord EX "S" light is on all the time. Took it to a transmission shop a couple months ago they reset the TCM by cutting the power to it like others said above...This helped temporarily but about a week later the problem started again and I've been reseting it myself for a month or so...Starting to get a pain so i changed the fluid and i took out the computer to look at it...everything looked 'and smelled' fine so i put it all back in...I'm driving to and from work at 70 mph about 4600 rpm. it will start and run in 2nd gear..i can get it to run in 1st if i shift it that low. but "D4","D3",and "2" are all giving me the same "2" gear.Tried getting the error codes, what i got was long blinks that never stopped??? someone said it could be an oxygen sensor? i'm not sure how that could be the problem but....just looking for some help....
thanks in advance, Mike |
Hondaowner
Freshman Member
Username: Hondaowner
Post Number: 3
Registered: 10-2004
| | Posted on Thursday, October 28, 2004 - 4:44 pm: | |
Here is my update in reference to my previous post regarding problem on a '91 Honda Accord LX AT:
Install a "used" TCM (P/N #28100-PX4-822)purchased it over the internet. Previous trans problem seems to have gone away. I can drive at D4 gear normally now with excellent start up speed.
After I had installed the TCM and turn ON my ignition, the first thing I noticed was the famous "S" --sport shift light goes OFF. I test the "S" button by pressing ON/OFF and show that I am now in control of that "S" mode light. Put my car into "R" -Reserve gear it shift quitely and smoothly. good sign!
My new concern is the gear shifting RPM...my RPM goes up close to 3000rpm before it shift to 2nd gear..same thing happened on 2nd gear (approaching 3000rpm) before shifting to 3rd gear.
I went to Honda dealership and got 3 qts of fluid for the AT. Had the AT drained and installed 2 1/2 qts of AT fluid hoping to get quicker, lower RMP shifting of gears. So far, that had not happened. I think I might need to take it to a mechanic shop and get the RPM shifting gear setting reset to spec. Does anyone has any other suggestion? Thanks in Advance. |
Cbaker14
Freshman Member
Username: Cbaker14
Post Number: 2
Registered: 11-2004
| | Posted on Friday, November 5, 2004 - 8:08 pm: | |
whats up?got a technical question,wondering if anyone can tell me the difference between 28100-PXO-832-M1 and 28100-PXO-833-M1 and if it makes any difference which one to put in a '91 accord EX. the one i have in there now is a 28100-PXO-832-M1 and im pretty sure its toast. any and all help is appreciated. |
Tnsunshine3
Freshman Member
Username: Tnsunshine3
Post Number: 1
Registered: 11-2004
| | Posted on Thursday, November 11, 2004 - 3:16 pm: | |
I have a 91 Honda Accord EX and had the same problem with the sports light coming on and tranny not shifting. Thanks to all of you for this board I saved $700 by putting the computer unit in myself. It was so simple I feel foolish for almost shoveling out all that money! I had a 28100-PXO-833 and was incorrectly shipped a 28100-PX4-833 but nonetheless it is working perfectly! Thanks a million for everyones expertise! |
Pawpaw
Professor
Username: Pawpaw
Post Number: 2148
Registered: 1-2003
| | Posted on Thursday, November 11, 2004 - 4:10 pm: | |
Welcome to the Motorweek forum Tnsunshine3.
Good feedback on the tranny computer changeout, glad to see it put the fix on your problem. pawpaw |
Guitar87guy
Freshman Member
Username: Guitar87guy
Post Number: 2
Registered: 10-2004
| | Posted on Friday, November 12, 2004 - 2:19 pm: | |
Tnsunshine3, I also have a "28100-PX0-832-M1" and i don't know if a "28100-PX0-833-M1" will work. I went to a junkyard and all they had was a PX4 and they told me IT WILL NOT WORK! but seems to me like everyone on here that try's a PX4 in for a PX0 does fine. I'm not sure what to do since they wont let me just try the PX4...i have to buy it first |
Oxrider
Freshman Member
Username: Oxrider
Post Number: 1
Registered: 11-2004
| | Posted on Friday, November 19, 2004 - 3:05 am: | |
I am having a related problem and was looking for some help. I have a '90 Accord DX with 178K mi.s. Recently, my speedometer quits then begins working again, but has continued to become more frequent. Also, the "S" mode light has begun to flash, and the only way to stop it is to cut the car off. I read some of the problems above and I will try some of the solutions, but I didn't see anything anything regarding the speedometer. How do I get the tranny codes, the link didn't work. Also my check engine light came on once when it seemed the be the coldest here. The problems occur more with the cold weather getting progressivly colder here.
Any help? |
Kla46
Freshman Member
Username: Kla46
Post Number: 1
Registered: 11-2004
| | Posted on Monday, November 22, 2004 - 2:42 pm: | |
I have a 91 accord ex with automatic tranny.i couldn't get the shifter to work without putting the key in the safty release slot to the right.was wondering if anyone has information to remedy this problem ? |
Kla46
Freshman Member
Username: Kla46
Post Number: 2
Registered: 11-2004
| | Posted on Monday, November 22, 2004 - 3:19 pm: | |
91 accord ex flaser relay won't stop clicking replaced with a new one but had same problem any ideas to what maybe malfunctioning ? |
Mailman
Professor
Username: Mailman
Post Number: 3361
Registered: 5-2002
| | Posted on Monday, November 22, 2004 - 7:19 pm: | |
Are you saying that once you turn the key it now works ok. If so it was probably locked. As to the flasher. Are you talking about the Emergency flasher? Is it flashing all the time or just clicking when you engage it? If it is just clicking when engaged, that is normal. |
Kla46
Freshman Member
Username: Kla46
Post Number: 3
Registered: 11-2004
| | Posted on Tuesday, November 23, 2004 - 10:24 am: | |
mailman,thanks for replying but the relay in question is a mitsuba-fr 3309 which is located under the dash just above and to left of the fuse box in a 91 accord ex. the problem is that it sounds like the turn signal is constantly on and the right rear turn signal never shuts off i replaced the relay with one from auto zone but had same problem so returned that one and i'm now looking for another solution.any help or insight into this matter would be greatly appreciated! |
Captainklutz
Professor
Username: Captainklutz
Post Number: 1024
Registered: 7-2002
| | Posted on Tuesday, November 23, 2004 - 11:53 am: | |
Kla46 - Sounds like a short or broken turn signal switch to me...I think you're going to need a manual and diagnostics to figure out where the problem is. I would seriously suspect the switch is broken (and thanks to Murphy's Law, it's on.). With any luck you can test the switch by finding the connector coming from it and testing the functions using a multimeter.
In the meantime, you could probably remove the bulb from the turn signal socket (assuming it's separate) or put a single filament bulb in (drawback there is that you'll lose the brake light on that side too.). But at least you won't drive everybody around you nuts with constantly on signal...
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Mailman
Professor
Username: Mailman
Post Number: 3364
Registered: 5-2002
| | Posted on Tuesday, November 23, 2004 - 2:29 pm: | |
I agree with Cap. Look first at the turn signal lever itself. Make sure it is actually working poperly. I would suspect you will find it is not disengaging. If that is ok then you have a short to + voltage somewhere which is very unlikely but not out of the question. You need to get this fixed asap. In my state they will write you a ticket for not signaling. |
Scnetworks
Freshman Member
Username: Scnetworks
Post Number: 1
Registered: 12-2004
| | Posted on Friday, December 3, 2004 - 12:11 pm: | |
I have a 91 Accord LX with 135K on it. Just had 4 new tires installed 2 days ago and have seen the two following problems:
- At around 60 MPH the speedometer drops to zero then for about a minute jumps up and down until it reaches the proper speed again.
- This morning - Sport light was flashing (car was not in Sport mode) Stopped car, put in park then D4 again - seemed OK after this.
- Also, have had the problem of the key not being able to be removed from the ignition for about a minute after stop on colder days. Have lived with this but now thing all of these problems may be inter-connected.
It's been a great car and would like to keep for a while (therefore the new tires). Could use the experts advice on what they think the true problem(s) are and how best to fix. Has not had an official "Honda Checkup" in a while, timing belt has been replaced.
Any and all help is appreciated ... |
Pawpaw
Professor
Username: Pawpaw
Post Number: 2195
Registered: 1-2003
| | Posted on Friday, December 3, 2004 - 12:55 pm: | |
On the speedo thing I'd suspect a faulty speed sensor, if you have the electrically driven speedo.
If it's a cable driven speedo, I'd lube it & see what happens. On my Renault it was the speedo instrument itself, had to remove it & successfully lubed it with Marvel Oil, 8 years ago.
On the key sticking, I'd opt for some lube for the ignition switch tumblers. Not shure if powdered gaphite is ok to use in this switch or not, so why don't we ask MikeB as he's a Honda tech that sometimes posts here, or call & ask your local Honda service center what's safe to use or, what they use.
On the shifter thing I just don't know.
pawpaw |
Mailman
Professor
Username: Mailman
Post Number: 3399
Registered: 5-2002
| | Posted on Friday, December 3, 2004 - 1:38 pm: | |
I would spay inside the tumbler with a good electrical cleaner and then lube it with whatever Honda Recommends. I do think powdered graphite will be fine to use but am not positive. It could be that as graphite is a good conducter, it may not be approiate. I personally use WD40. |
Raymond
Freshman Member
Username: Raymond
Post Number: 1
Registered: 12-2004
| | Posted on Monday, December 6, 2004 - 4:48 pm: | |
I've been having similar problems related to this sports shifter light. I have a 1991 Accord DX automatic with 144,OOO miles on it. Had it in to the dealer for semi-annual service about two months ago. About two weeks ago I turned the car on and the "S" light was lit. The car would not shift into D4 automatically but I could manually go from first to second to D4 and drive it fine as long as I shifted manually, though "S" light stayed on the entire time. I tried resetting the TCM/ECM a couple of times and that fixes the problem for 3-4 days at a time. I checked the error codes and get a solid orange check engine light. I guess I have two questions:
1)Would this mean that it's the ECM and not the TCM that needs to be replaced? I'm a bit confused as a number of people who have had these kinds of problems have stated that the fix has been the TCM.
2)How do you physically diconnect and remove the ECM or the TCM? I've never done this particular repair and don't know how to disconnect the wires from either unit.
Any advice would be greatly appreciated. Thanks to everybody who has posted on this so far. |
Bseet_zeus
Freshman Member
Username: Bseet_zeus
Post Number: 1
Registered: 12-2004
| | Posted on Tuesday, December 7, 2004 - 10:55 pm: | |
I have some good transmission info to pass along on the Solid "S" light. My 90 Accord EX started to experience this just two days ago. I have 154,000 on it and through this forum in another thread I found the following info. Here is some info on where to find the TCM on your 89-94 accord. This is from www.ECMtogo.com: "The engine and transmission computers for the Hondas are usually located under the carpet of the passenger side floor/foot rest area. Remove the carpet, which may require loosening the door jam or trim areas of passenger kick panel.
Once the carpet is pulled back you should see a large (and you'll find out soon, quite heavy) "bash" or protection plate. This can be removed by extracting the fastening screws to the plate and moving the plate to the side. There are two or three plugs in each unit. Depress the center of the tab and pull away from the unit. The transmission computer is the one with the prefix part number "28100" and the engine controller has a prefix of "37820". As we stated, the trans controller is much more prone for failure. Be sure to check your distributor and ignition components before investing in an engine controller. Most trans computers and repairable and you will likely be in "limp mode" or "fail safe" mode which is 3rd gear and rev only and the "D" or "D4" light will flash or stay lit. Often the Sped sensors or shift solenoids are adversely affected and must also be replaced. Be sure to have them tested before reinstalling reman trans computer."
Now with that said, I ran across another comment that stated that if you know how to solder components with a soldering iron, you can repair it yourself. At this point, what have I got too lose. So, the problem component inside the computer board is the in the top right area. So, with that said, I removed the TCM, removed the electronic board from inside the unit and found "EXACTLY" that problem component. It was a "burnt" resistor, #R41 I believe and with a $1.09, 5-pack of 15 Ohm, 1/4 watt, 5% tolerance resistor from Radio Shack, I am back in business. Talk about going from a $678 repair bill to 2 hours of time and some spare pocket change, it feels good. Just for reference, if you look for replacement TCM unit and you have a EX model with a sport shifter, make sure you get a matching unit. My unit was a OKI AT Control unit (with error code 15) and P/N 28100-PX0-931-M1 3LZ Lot 9818U. Made in good 'ole Norcross, GA. Good Luck and hope this info helps somewhat.
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Raymond
Freshman Member
Username: Raymond
Post Number: 2
Registered: 12-2004
| | Posted on Thursday, December 9, 2004 - 9:33 am: | |
Thanks very much for the help. I'm waiting for the problem to recur one more time so I can figure out whether it's the ECM or TCM that I need to replace. (No soldering experience.) I reset the units last Thursday by taking the fuse out and all has been working smoothly since. |
Hondaowner
Freshman Member
Username: Hondaowner
Post Number: 4
Registered: 10-2004
| | Posted on Monday, December 13, 2004 - 1:04 pm: | |
My 1991 honda accord 4dr LX eom TCM had R41/R42 and R43 resistor burnt on the circuit board. Does anyone know what R43 Ohm??watt?? spec is? TIA. My vehicle currently is running off a used japanese model TCM with 28100-PX4-822 as reference. Still trying to fine tuning the auto shifting of gears. Final gear (4th) running like the transmission is brand new. Will attempt to de-soldering these replacement resistor onto eom TCM after obtaining correct R43 spec. |
Captainklutz
Professor
Username: Captainklutz
Post Number: 1039
Registered: 7-2002
| | Posted on Monday, December 13, 2004 - 1:55 pm: | |
You have to "read" the bands on the resistor to get it's specs. I found this website (http://xtronics.com/kits/rcode.htm) or, Radio Shack could probably do it for you and even sell you a replacement.
Good Luck,
Cap |
Jimb
Senior Member
Username: Jimb
Post Number: 379
Registered: 4-2003
| | Posted on Monday, December 13, 2004 - 2:13 pm: | |
Bear in mind that just replacing the resistor may not fix the problem. Resistors in electronics circuitry normally don't just go bad by themselves. They usually burn up because of a short circuit somewhere or because some other circuit component such as a transistor or diode or capacitor is drawing too much current because it failed or shorted internally. |
Captainklutz
Professor
Username: Captainklutz
Post Number: 1041
Registered: 7-2002
| | Posted on Monday, December 13, 2004 - 2:46 pm: | |
Jimb, normally I'd agree with you, but it sounds like maybe Honda suppliers got a bad batch of resistors (or their computers over-drive them)...if there are instructions on another site about replacing them! |
Hondaowner
Freshman Member
Username: Hondaowner
Post Number: 5
Registered: 10-2004
| | Posted on Tuesday, December 14, 2004 - 7:19 pm: | |
The following article I am sharing with you which I got from spending hours researching on the internet that I know will help those on this forum subject. When you access the link, make sure you print the info out in hard copy for later referencce cause the site will remove this info going forward to enable other article to be posted. Also, I am in the lookout for the Part 1 and Part 2 to go together with this Part 3 I am pointing you to. Enjoy reading..Knowledge is POWER! So enpower yourself from knowledgable source, in this case in Honda transmission guru and ATRA (Automatic Transmission Rebuilders Association) Technical Advisor (http://www.atra-gears.com/technical/vandyke.htm)...
Here is the link regarding TCM problem for Honda Accord 1990-1994 TCM:
http://www.gearsmagazine.com/2004-01/2004_1_8.pdf
On another note, I can't read my R43 resistor cause the "bands" had corroded (sp??) beyond recognition.
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Poorguy
Freshman Member
Username: Poorguy
Post Number: 1
Registered: 12-2004
| | Posted on Saturday, December 18, 2004 - 3:25 pm: | |
I've had all this problem since last 2 years now: S light always on, speedometer is always zero and jumps intermittently. But do I really need to do anything about these things ? I don't have time to do anything myself and I don't want to spend money on TCU and speed sensor. Also, in one of the posts I read that "S light on is not a problem but a feature". I've been manually shifting the gear to D4 whenever I drive. When I stop at the traffic light, I shift the gear to 1 and then again manually shift it to D4 as I speed up. The car runs fine: 70 mph at 3000 rpm. All I do is change the oil every 3k miles. Do you think this is OK ? Or can something else go bad in the car if I continue without new TCU and speed sensor ? |
Soms
Freshman Member
Username: Soms
Post Number: 1
Registered: 1-2005
| | Posted on Tuesday, January 4, 2005 - 5:10 pm: | |
This is a great forum. I have the same problem listed above, flashing S light, tranny will not shift on it's own but will work in 2nd and 3rd. I can't find the computer under the dash to see what to purchase. I have a 91 Accord LX. Pls tell where it's located and if there are any "gotcha's" in removal and replacement. Thanks |
Mailman
Professor
Username: Mailman
Post Number: 3532
Registered: 5-2002
| | Posted on Tuesday, January 4, 2005 - 10:40 pm: | |
The computer for the transmission is under the passenger seat. |
Tyranitar
Sophomore Member
Username: Tyranitar
Post Number: 88
Registered: 11-2004
| | Posted on Thursday, January 6, 2005 - 1:00 am: | |
You know, if you have a well maintained tranny, I do recommend zMax. They also promise fuel economy improvements, which it does do, though the actual results are not even close to the claims. However, this stuff completely fixed the hesitant shifting in my '92 Aerostar, and improved its highway economy by 1 mpg. No difference on city driving. I did not use the zMax Oil treatment on the Aerostar. I don't know if the Oil treatment part works or not, though it should. Those superlubes do work, I have tried Slick 50, Prolong, and zMax, and the zMax is the best of those. Prolong works too. Slick 50 is crap, don't wast your money on it. |
Trannyman
Freshman Member
Username: Trannyman
Post Number: 1
Registered: 1-2005
| | Posted on Monday, January 31, 2005 - 12:13 pm: | |
There are several parts that fail in the Honda TCM and the resistor is just 1 of them and is a secondary failure. The primary failures in the controller will still continue to exsist and cause other transmission performance issues. There are places that offer remanufactured controllers for a reasonable price that will warranty them you might want to check into that. |
Tradertyme
Freshman Member
Username: Tradertyme
Post Number: 1
Registered: 1-2005
| | Posted on Monday, January 31, 2005 - 4:08 pm: | |
Last week the transmission on my '90 Accord went into "limp mode" including the flashing "S" lite. After I read the commments in this forum, It seemed clear that the TCM (P/N 28100-PX0-932) was bad. I bought a used TCM (P/N 28100-PX4-932) and replaced it today. The transmission shifted 1-4 but did not go into 5th. After about 3 miles the "S" lite began to flash again. The transmission continued to operate correctly but didn't go into 5th gear. I don't know when the transmission was last serviced, if ever. Prior to this incident the transmission worked great. Do you think the used TCM I purchased is bad or does the transmission need servicing? What are your thoughts. |
Pawpaw
Professor
Username: Pawpaw
Post Number: 2343
Registered: 1-2003
| | Posted on Monday, January 31, 2005 - 10:29 pm: | |
Welcome to the MotorWeek forum Tradertyme.
If this puppy hasn't had a tranny fluid & filter change in 15 years I'd say it's loooooong past due!!!!
I'd first opt to have a new tranny filter & pan gasket installed, then a FULL fluid change out done, but WITHOUT any chemical flush. No need to chance stirring things up.
Also insist ONLY Honda tranny fluid be used. I'd do that & see how things go, as it NEEDS it anyway. pawpaw
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Trannyman
Freshman Member
Username: Trannyman
Post Number: 2
Registered: 1-2005
| | Posted on Tuesday, February 1, 2005 - 8:12 am: | |
servicing the tranny won't hurt anything but insist on OEM Honda fluid. the OEM fluid has more friction modifiers in it to help stop the clutches from chattering. But there is 1 issue MOST Honda's don't have a pan or pan gasket and on the models that have no pan the filter is inside the case (bad design) so all you can do is drain and fill.
But if the tranny was working fine until the controller went then I'd suspect the replacement controller. the problem is when you get one from a salvage yard it has about the same ammount of time/miles on it and is going to have the same problem shortly if not as soon as it's installed. Like I've stated above there are places that will reman these controllers most of the time for a reasonable price but due to the AUP policy here I can't post that info. |
Tradertyme
Freshman Member
Username: Tradertyme
Post Number: 2
Registered: 1-2005
| | Posted on Tuesday, February 1, 2005 - 8:42 pm: | |
Trannyman,
Can you send the contact info for TCM rebuilders to: tradertyme@yahoo.com?
I changed the fluid today - still no 5th gear and the flashing "S" remains. Otherwise everything is good. I suspect the TCM I purchased is faulty. I will check the codes.
Thanks guys.
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Pawpaw
Professor
Username: Pawpaw
Post Number: 2350
Registered: 1-2003
| | Posted on Wednesday, February 2, 2005 - 12:48 am: | |
Good idea on the tranny fluid change Tradertyme, would be interesting to know how did it looked, felt & smelled, with all thse miles & years on it????
Did you change the filter & use OEM Honda fluid????
If the 5th gear solenoid is varnished up & sticking, it might take a few miles for the detergents in the new tranny fluid to loosen things up in there.
Of course if it's a solenoid or computer it won't change things, but the tranny shure will like bathing in all that new fluid. LOL |
Trannyman
Freshman Member
Username: Trannyman
Post Number: 3
Registered: 1-2005
| | Posted on Wednesday, February 2, 2005 - 11:45 am: | |
actually in a pinch you can use Chrysler 7176 fluid too.....not quite as much friction modifiers but it's the closest commonly available fluid and a far better than dexron, mercon or type F plus you can get it at any auto parts store. |
Mailman
Professor
Username: Mailman
Post Number: 3676
Registered: 5-2002
| | Posted on Wednesday, February 2, 2005 - 12:37 pm: | |
First, I would not recommend using a transmission fluid that does not meet the Honda requirements for your vehicle. You can walk into any Honda Dealers parts department and buy the fluid and perform the service yourself. Yes, Honda automatic transmission oil is pricey. Why is that? It’s not regular transmission oil. This, of course, you will find out after installing a transmission fluid that is not correct for your Honda. If you want to use regular Automatic Transmission Fluid (ATF) in your Honda you will need to put an additive in that oil. There is a company called Lube Guard that produces such an additive. Their product is found in many parts stores and comes in different types. Be sure to check the information on the bottle to confirm that you’re purchasing the correct additive for your vehicle’s transmission fluid needs. This does provide an alternative but the best way to go is with the Honda fluid. Why take a chance? Use Honda fluid and you have nothing to worry about. Make sure you check the fluid level according to the instructions in the owners manual. Some you must check it cold and not hot. Overfilling will damage the transmission.
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1991 HONDA SPORTS SHIFTER PROBLEMS...
