1989 240sx OD problem

[frat_64]

I have 1989 240sx automatic. It seems to be in OD. It is an automatic and on the shift stick there is a button for overdrive. In the past i depress it while driving and the RPM's would go higher. I never would use it tho. There's nothing wrong with the trans.......its fine. I changed the water pump on it last week and ever since its seems to be in overdrive. Now when I depress the OD button nothing happens. RPM's are high and dont want to go in 5th gear. Button dose not do anything now.It runs fine besides that. I checked fuses in car and under the hood....all ok. There are like 8 relays with the fuses under the hood that I have no idea what for or if there good or bad. I though maybe when changing the water pump I pulled on a wire? I checked all looks ok. I'm thinking more like a relay is bad....maybe?............not sure which one tho..............OR could it be something else???..ANY HELP would be greatly appreciated

[s13redtaz]

autos dont have 5th gear. just 3+ OD

[ricebike]

use OD to maximize mileage...------------------------------------

if ya wanna test for automatic trouble codes, i think there's an article floating around... if you can't find it after searching, lemme know & i'll help ya run thru it!

[frat_64]

that just shows how much I know about the 240sx...LOLWell its not going into the last gear....3rd? RPMs are running high also.

[ricebike]

hopefully, one of those free FSM downloads still work... give them a go-thru & if you didn't find them there, i'll be back

heck, try reading for trouble codes as well...

http://www.240sx.org/faq/articles/ecmcodes.htm

[dkdeleon68]

remove the center console and check the wiring that connects to the OD button.also when you press the button does the OD light come on? the light is on the panel to the right of the steering wheel labeled OD. check fuses and wiring to the OD button.

[frat_64]

Yes, when I press the OD button the light dose come on.I did not see any fuses or relays labeled for OD? I did check all fuses in and under hood....look ok. I did not check wiring .....yet.............By the time I get home from work its dark out and I do not have a garage. So all advice that i am getting onthis site..............well be checked this week-endWhat would the air intake boot have to do with OD? There is however 4 relays under the boot that I just found this past week-end. I have no idea what (on the relay cover) they mean, or go too.

[frat_64]

Will that affect my OD? I found the ain intake but mine is on the driver side and was a real ***** to get out to look at the relay box under it.

[s13redtaz]

remove the center console and check the wiring that connects to the OD button.also when you press the button does the OD light come on? the light is on the panel to the right of the steering wheel labeled OD. check fuses and wiring to the OD button.

could be a number of things. you just replaced the waterpump...hmmm hows the car idle? high/low when in drive versus neutral?

[frat_64]

First of all I would like to thank all advice that i am getting........it is greatly appercated!!Here is a little more detail of the events that has happened.About 6 months ago my 240sx was running a little warm. So flushed the radiator. The water was very rusty looking. I flushed it like 6 times. I drained and filled with fresh coolant. It still ran a little warm, but was better then before. About a month ago it started running warm again. Thinking that the radiator was maybe bad from all the rust, I ordered a new one and replaced it with a new thremostate and new hoses. (before this the OD was fine) After replaceing the above it was ran hot. I never drove it, just let it idle and watched the temp go higher and highter. I shut it off and replaced the water pump. The old water pump had no empellas left!! None!!. Thats where I think all the rust came from.. Now it runs cool (normal) but OD is not working. (see 1st post) That is how and where I am now. Is there a relay for OD? If so, what is marked on top of the relay box?

[ricebike]

oh crap!

did you check/replace the trans fluid & engine oil as well???

EXCESSIVE heat will turn that pink fluid to brown... engine oil would be like hersheys syrup... hope you did those things as a follow thru...

-----------------ok, 10 steps for the self-diagnosis of the auto transmission using the OD OFF indicator lamp:

warm up engine/transmission to operating temp

turn key OFF

1: set OD switch ON

2: make sure it's on P ~ key ON, engine not start; do U C OD OFF light on for two seconds? if so, move to step 3

3: key OFF & shift to D

4: set OD switch OFF ~ key ON, engine not start ... wait ~ two seconds

5: shift to 2

6: OD switch ON

7: shift to 1

8: OD switch OFF

9: step on gas pedal all the way & release

10: OD switch ON

then, u should see the OD OFF light flashing 10 times

---------------------

u r looking for that long flash = the trouble code

if ALL ten flashes da same: OK

1: revolution sensor/circuit shorted or disconnected

2: speed sensor short/disconnected... etc.

3: throttle sensor

4: shift solenoid A

5: shift solenoid B

6: overrun clutch solenoid

7: lock-up solenoid

8: fluid temp sensor disconnected or AT control unit power source is damaged

9: engine revolution signal circuit

10: line pressure solenoid circuit--------------------------XTRA+++

if the OD OFF light is flickering: battery power low, battery disconnected fo long time

if OD OFF light is always on after setting the trans into diagnostic mode: u got a damaged trans control unit or the following is disconnected/shorted:

inhibitor switch, OD switch, kickdown switch, idle switch

hope that helps
Modified by ricebike at 2:51 PM 11/15/2006

[frat_64]

Yes, oil changed every 2500. Right after water pump too. Tran fluild looks good....nice and clean. I will copy, paste and print. the self-diagnosis of the auto transmission that you posted this week-end. THANK YOU. I will post the out come after I do it.I brought this 240sx about 3 years ago from a lady at work. Her mother died (87 years old) and she got the car a put it up for sale. I asked her about it. Her mom kept it in the garage and only drove it to the store and back. 32,000 original miles!!!. She told me that 4 other people were interested in it. If none of them did not want it she wold get backnto me.A month later she asked if I still wanted it?.........Hmmmmmmmmmm Let me take it for a test drive............The thing looked and ran GREAT!! I did take it for a drive and then asked what she wanted for it..........2,5000..............I'll give you 2,000.................OK................I stole it from her!!!!!.........Now it has 50,000 miles on it.

[ricebike]

off-topic, but need to check it out... just in case.

there was a TSB on that timing chain guides... if it were done, you should see lotsa RTV around front timing chain cover...

[s13redtaz]

we demand pics! that is a deal man!just post in the 240sx/silvia forum

[frat_64]

I did the self-diagnosis test and onlymade it to step 2.I pulled the center console off and checked all wires......looked ok.I checked all fuses again.............ok.I took it for a test drive. At 75mph its running 5,000 rpm's. Is that what it should be or is that too high?I also pressed and depressed the OD button....while driving, nothing happened. Will it hurt anything to drive it like it is now?

[s13redtaz]

that does sound kind of high...sounds like theres a bad relay or something...does the OD button work when the cars off and you push it in? if anything push the button in, unplug your battery and let it sit for a while to reset itself. then after 10-15 minutes put the battery back and take it for a drive.

[frat_64]

Today i drove it to work. 35 miles.At 75mph the RPM's were at 4,500.The OD button dose nothing.........only light comes on and off when I press button. You can tell when driving its not going into OD.Someone said it could be the OD solenoid. Is there one? and if so, where would it be located?Thanks again for your help

[ricebike]

um, sorry about not checking back sooner; i was taking the driver training / test for FedEx...

hmm, did you @ least download/ read any of the free Factory Service Manuals that i've got linked in my signature?

there's 3 checks for diag procedure 1 when u didn't get past step 2: the last part, the OD light indicator seems to be working, so that one's crossed-off...

you have to check the A/T control unit's power source and ground circuits...

some1 w/ a similar FSM? see page AT-47 or i'll scan it for you l8tr...

the control unit is on the pass side, probably up further into the kick panel... above the ECU/ECM... & has a 16-pin plug... along w/ a 20-pin plug next to it: u r going to use the 16-pin plug to check for power/ground sides...

key point: but it's so weird that you have this prob AFTER you did the water pump change... i say recheck everything around that area...

Quote »At 75mph its running 5,000 rpm's. Is that what it should be or is that too high?I also pressed and depressed the OD button....while driving, nothing happened. Will it hurt anything to drive it like it is now?[/quote]that's not good to be running @ 75mph 5,ooo rpms for extended times... please make sure your AT fluid is OK. & make sure the OD OFF light is not lit up/keep OD switch ON...

any ENGINE trouble codes stored on the ECU?ECM???

Quote »Someone said it could be the OD solenoid. Is there one? and if so, where would it be located?[/quote]if ya see the list of A/T trouble codes, u will c that there are 5 different solenoids in question, so you don't wanna be throwing parts @ it ( #4-7 & 10)

[frat_64]

So, did you pass the Fedx driving test?? My Brother-in -law works for them in one of their miami warehouses. He says he loves it and the pay is great.Last night I stayed late at work. We have a huge shop with good lighting.I disconected and reconected EVERY wire that I could under the hood....Took it for a test drive afterwards....................MY OD IS NOW WORKING!!There HAD to be a loose wire somewhere, not sure where? but there was.Now its running good and the temp is fine. I had to pull on a wire while changing the water pump!!Thanks for all your help and recomendations. Now where should I post a pic of my 240sx? Was it you that wanted to see a pic of it?Thanks again!!!Gary H.Clewiston, Fl

[s13redtaz]

congratulations on the fix! but yea it was me that wanted to see pics! just post in in the 240sx/silvia forum

[ricebike]

Quote »So, did you pass the Fedx driving test??[/quote]yeap, it was a simple test; i just had to get used to driving a big *** budget box truck since i'm only a seasonal driver... pay is better than NAPA autoparts driver. i'm just not on NICO or online much anymore. see this thread:

zerothread?id=211846

well, know you know how to check for automatic transmission codes for the s13

free hosting via photobucket for your pix!

congrats on the fix