just pulled auto trans trouble codes what do they mean

[1hotsilvia]

I just pulled the automatic trouble codes from my 92 240sx. I got a 4 5 and 6 can you tell me what they are? thanks a bunch.
Modified by 1hotsilvia at 11:37 AM 1/14/2006

[elwesso]

4,5,6 mean shift solenoid A, B, and the overrun clutch solenoid, respectively... I am in Angola, IN

Id think that a harness connector is unplugged or screwed up..

[1hotsilvia]

thanks for the info. i've been having transmission problems since i got the car. I've replaced the first transmission, which was trashed. with a different one from a local junkyard and have since been having new problems. My car's transmission acts up after driving it aggressively to semi agressively. (It loses overdrive and drive until you restart the car.) Is the harness you think is screwed up the one that plugs up into the transmission (you have to remove the pan to get to the plugs) also what does a overrunclutch solenoid do? Is it related to the kickdown solenoid?

do you just unplug the battery to reset the memory on the tcm to remove codes, or do you need to do something different?

I hate to bother you, but noone seems to know much about these transmissions. I borrowed a tech book on imports from a local dealership today, and didn't find any of the answers i was looking for in it. i'd love some more info about my transmission if you have time.

[elwesso]

Well i suppose the TCU could be at fault too..... It would be kind of surprising.....

If its throwing codes for the shift solenoids, it makes sense that theyre bad or not plugged in right..... The overrun clutch solenoid controls overdrive if memory serves, ill have to go back and check.....

Generally with nissans they dont have goofy electrical problems like this, i havent herad of the solenoids failing very often.

[1hotsilvia]

thanks for taking interest in my problem, I would appreciate as much help as I can get. I plan on getting under the car sometime in the near future to double check things over again. I do think that the kickdown solenoid may be causing my most major issue. (It is not coming back into a higher gear after kicking it down). The car shifts a little hard from 1st to 2nd most of the time. And I feel that it is not shifting soon enough in all gears. Sometimes when I'm driving in Od (around the 60mph mark at a steady speed) I feel and hear a very slight rpm drop as if it was not quite in od fully and finished engaging . I hope to resolve these issues soon so I can add some power to my ride after my body work is finished.

[elwesso]

Id consider making a trip down to auburn sometime if you wanted me to look at it.... I dont know if youd be interested in that or not, makes no difference to me...

If its not shifting at hte right time, that could also be TPS related, which IMO would make more sense.... Im kinda leaning toward that....

[1hotsilvia]

I would love it if you would take a look at my car and give me your thoughts on the matter. If you didn't want to drove up here, me and my boyfriend go up to sea dwellers at least once a month to pick up feeder fish. We could drive my car up and meet sometime.

[NISTECH]

All 3 solonoids use the same ground. I suspect it is weak or not attached. It located in the trans right next to the solonoids. Drop the pan and find the cluster of solonoids on the valve body. Right near it somewhere there will be a ground lug. check its security and weather the wire itself is firmly crimped to the lug. Note there are 2 grounds on that harness the other is for the line pressure solonoid. That one is more remote then the one for the other 3.

[elwesso]

I didnt even think about that NISTECH, good info.....

[1hotsilvia]

thanks for your input. would this cause the symptoms I described? I do remember there being a loose nut last time I had the transmission flushed. They just screwed it back in, I imagine it might had possibly been the ground lug. It was about in the middle if I rember right. were there fiveseperate leads on the harness running into the transmission? I can't remember. I assume thats the harness your talking about. What does the overrun clutch solenoid do? (I think I need a book about this transmission)

[onosqv]

I just pulled the automatic trouble codes from my 92 240sx. I got a 4 5 and 6 can you tell me what they are? thanks a bunch.

Modified by 1hotsilvia at 11:37 AM 1/14/2006

How do you pull codes from the tcu?

THANKS

[1hotsilvia]

I originally found this in the nissan tech forum. . Here's a copy from my records. I can't remember where I found it for sure so here you go. I believe this was originally posted by nistech, correct me if I'm wrong. I hope this isn't against any forum rules, someone please let me know if it is.

" "1)start vehicle and warm it to operating temp.2) turn the key off and press the OD button to on position make sure shifter is in park.3)Turn the key on engine not running make sure the od light comes on for 2 seconds. If it does go to #4 if not post back.4) turn the key off and shift the trans to D. use the lock release if neccesary. Set the OD switch to off.5) turn the key on and wait at least 2 seconds. then set OD switch to on.6) Shift to 17) set overdrive switch to off.8) press accelerator to floor then release it completly 9) set overdrive switch to on.

This will start the OD light to flash your codes. The light will have one long illumination flash then start flashing short blips. Watch the flashes carfully cause one or more of them will stay on slightly longer then the others. There are 10 flashes total. If say it goes like this, first the start signal long flash thenblip..blip..blink.blip..blip..blip..blip..blip..blip..blip. notice how the thrid was a little longer. The would be a 3 which corrospondes to TPS short or open.

When you do it there are 10 posibilities plus a no failure which would be all blips of the light."."

[elwesso]

Silvia... I think that the order of business right now is to remove the pan... pretty easy, you should have it off in about 30 mins.....

[1hotsilvia]

I agree that the problem is probably inside the transmission. But I think I'll start by checking the adjustment on the tps, then the shifter linkage, and then the pan will be getting dropped for inspection. I would like to find someone who has all data so I can get some diagrams of the inside of the transmission, Like above the valve body. I'll wait until my boyfriend can take it with him to work so he can drop the pan over the pit. It'll be much easier that way, and far less messy. I need to go look for the tps test charts. I think I erased them of my files accidentally. I would still like to meet sometime. I'll get ahold of you next time we go to Angola, maybe we can go eat at the pizza king or something.

[elwesso]

Sure that sounds good..... If push comes to shove, i can pull the pan, but im not gonna do anything with the valve body....

I got the FSM on my computer... so whatever you need i can supply

Just a little word of advice: if the TPS isnt causing you any specific trouble, do not touch it. Youll be sorry you did because you cant get the adjustment perfect without a consult.

[1hotsilvia]

thanks elwesso. I don't plan on removing the tps, just back probing it for voltage checks. If the valve body need to be removed, I'm going to consider having it modified. By the way, could you get me them diagrams I was talking about?

I'm pretty sure my shifter linkage may be out of adjustment, my driveshaft wouldn't lock when the car was in park for a while there. Is the tps that big of a pain on these nissans? I'd appreciate the voltage of tps on the ka24de auto if you know what it's supposed to be. I've been looking for half an hour now (we have dial up), and almost everyone has the ka24e with manual. Is .5 correct at idle, and what's it supposed to be at full throttle?

I'll check back later tonight, I need to be getting my butt up to fort wayne.

oh and thanks for volunteering, but we can handle pulling the pan. I've just been taking my time with my problem because I have more than one car to drive, and he just did a engine swap on his honda, he's still working out the kinks. (a stroked out b18 into a 92 hatch).

[elwesso]

heres for the TPS..

I usually check the resistance first... Its easier that way IMO...

[elwesso]

The 240 FSM didnt have the diagrams for adjusting the shift linkage, for some reason, so heres a diagram from the Q45 service manual

[1hotsilvia]

thanks elwesso. I'll be getting on that sometime this week hopefully. But I'm a little confused, isn't there adjustment for the tps in an automatic? anyway, I checked with somebody who has all data today about getting some diagrams of the inside of my transmission. more specifically, sensor placement and ground placements. no luck so far. I'll keep looking.

[elwesso]

The thing for the TPS automatic is the top diagram.....

Icouldnt find much for hte inside of the transmission, namely where that ground is... I think it would be fairly self obvious, though.

[elwesso]

also if you email me i can email you the AT sectino of the FSM

[1hotsilvia]

Ohm tested the tps, didn't get good results but I'm not throwing any tps codes to the tcu or the ecu. Going to voltage test next. A friend thinks it may be the mass air flow so we'll test that too. I wouldn't think that would be malfunctioning because my car does go over 2500 rpm while it (my car)is malfunctioning.

I Greased some connectors with dielectic grease. Unplugged harness to rev. sensor and test drove. Seemed to respond better, but my car still wouldn't go back into drive or overdrive after I really hammered on it.

It also lost drive and overdrive when driving down the road, putting car into neutral and revving over 4000 rpm, then putting car back into drive at the normal rpm's to resume driving. (with the sensor plugged in). I'll try this today with car just setting still in neutral and park to see what happens.

We also found a little black box underneith the drivers dash lastnight. A manual transmission electronics servo, (it's a universal black box that has settings for 4,6,8 cylinders as well as diesels, its gone now and the car runs the same) Was this one of those dealer installed parts or what? It was tapped into all kinds of harnesses.

I'm going to recheck codes today, is ther any special way of clearing them?

[1hotsilvia]

erased does yesterday, pulled codes after normal driving. none.

drove home and get on it hard on the last quarter mile or so, pulled two codes now. 4 and 5 , solenoid a and b. no more overrun clutch solenoid. I hadn't pulled the battery cables since the transmission swap. It wouldn't go into drive at first at all when we first put it in.

so how exactly does solenoid a and b work? Is there a possibility that sticking valves could be throwing these codes?

I am going to repeat this test today.

[elwesso]

basicsally these solenoids work by, as i understand it, just like a switch... The computer commands them to turn on and off by connecting the poewr with the ground......

[1hotsilvia]

I performed the test again with the same results.

I erased the codes, drove around for awhile without getting into the throttle heavy (normal driving) checked the codes, no codes.

I drove around some more only I layed into the throttle, this time I did it starting at first gear and my car went to third gear, but would not go into 4th or od, (my car also loses drive and overdrive if I kick it down while driving in drive or od). I pulled the same codes as yesterday 4 and 5.

solenoid a and solenoid b.