SHIFT SOLENOID PROBLEMS

[hydeehydee]

1995 Accord EX V6...i recently had a issue where the D4 light was flashing along with hard shifting of the tranny...put the car on a computer and said the shift solenoid (circuit A) was bad... i have replaced the solenoid and still the problem persists...i don't want to pay again to have the car put on the diagnostics computer but the problem is not yet fixed...does anyone have any ideas as to what i should do next? I cannot afford to leave it with someone to tell me stuff i already know and pay them again for known knowledge...i am ready to push this car off a bridge!!

Also i should add the tachometer? thingamabob rapidly jumps back and forth quite a bit..once in awhile it will register normal...soon you will be able to call me the HONDA KILLER!!

[HondaTechPro]

I wouldn't pay to have it re-diagnosed. They tried to fix the problem one time, and failed. You shouldn't have to pay again. Take it back to where it was "repaired" and state that they did not fix the problem, and that you either want it fixed, or your money back.... don't be too much of a dick, but you have to be persistant.

[hydeehydee]

this is my dilemma..when i was told the problem i searched high and low for the solenoid since it is on national backorder...i found one on the shelf in a Honda dealership in Miami...i had a mechanic put it on which is someone i know...this was not done at a shop...the only thing i have paid for is the diagnostics and the part which was over $200 alone..could there be a wiring problem with the solenoids? i know there are 2 of them on this model...i am so confused as what to do...

[HondaTechPro]

There very well could be a wiring issue on this car. The solenoids you talk about are the linier solenoid, which controls line pressure in the transmission, and shift solenoid A/B. The shift solenoid can only be replaced as a set... which you have discovered. The problem lies in the solenoid's activation. Think of a solenoid as a lightbulb. It is an electrical componant that does "work". Now that you have replaced it, and it STILL doesn't work.... you have to look for other causes. Like if it was a light bulb... you put a new one and it won't turn on, must be a wiring issue. In your case the shift solenoid is controlled by the Transmission control module (TCM). The TCM supplies voltage to the two wires going to the solenoids. One wire is for solenoid A, and the other is for solenoid B. The solenoids are grounded by the mounting bolt(s) that attach them to the transmission case. As you drive, the TCM takes information from the Throttle position sensor(TPS), the vehicle speed sensor(VSS) and many other inputs. It uses these inputs to make a calculation of when the transmission should shift. When the time is right, it applies voltage to solenoid A, or solenoid B, or both... depending on what gear it is shifting into. Somehow, your TCM is not doing this. Maybe the voltage is there, but the ground is bad, preventing operation. Maybe the shop that diagnosed it jammed test leads into the connector and ruined the pin fit, making a poor connection. Maybe there is a problem insdie the TCM... maybe the TCM just needs to be reset (disconnect the battery for a while).... The bottom line is that you still have a problem, and one that could have several different causes. You need to figure out WHY. Also, I have to bring up the possibility that the transmission itself has failed. It is not unheard of for the transmissions to throw shift solenoid codes when the internals are damaged, hopefully that is not the case, but if everything else turns out to be good.... it might be. Sorry man.

[hydeehydee]

so where do i go?? who do i take my car to? i have tried the TCM and it made no difference...this is also something that happened all in seconds..not the usual tranny slowly getting worse...fine one minute hard shif and flashing D4 light the next...i just don't know where to go...any suggestions?

[Hondaman56]

Did you re-set the TCM after you did the repair??

[HondaTechPro]

Well I really can't suggest any independent repair shops in your area... I don't know of any. I'm sure there are good ones that could help you out, try asking at the local parts stores - see if they can recommend a shop. Other than that I know your dealer could tackle this, but they will charge you for everything. Good luck.

[Chiovnidca]

Originally Posted by hydeehydee

...put the car on a computer and said the shift solenoid (circuit A) was bad...

What was the trouble code? may help narrow down the problem.

[hydeehydee]

there were no codes given but the diagnostic computer displayed an error with the "shift solenoid circuit A"...someone told me today it might be the relay...not sure what to think

[Kaitosamma]

im curious however because from what ive read,and from checking for both the tcm and ecm lights i only get an ecm light (17) for the vss the speedo doesnt work
so and correct me if im wrong on this the ecm because it doesnt detect the signal to the vss wont allow it to shift past 2nd as a fail safe
vehicle - 95 accord f22b1
hmm lemme know

[deelapo]

I have the shift solenoid problem P0762. It shifts gears properly but from gear its like a drag but when it leaves gear 1 all seems well. Yesterday the d4 light started blinking but dt has stopped now. What do I do?

[Bad_dude]

When the solenoid was replaced, did the guy clean the area and the screen? That happens to my buddy 92 Accord and I took the solenoid off and clean the screen and the problem went away. His TCU caps were not in the greatest condition. I replaced all 5 caps any way.