ZACk342 Questions about your original 99JWT ECU
11-27-2006, 05:37 PM
#1
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ZACk342 Questions about your original 99JWT ECU
I've had the JWT ECU you Pioneered for about a month now but had some questions about how much you figured out about it. I read up on your original thread on it but didn't really get much info out of it. http://forums.maxima.org/showthread....ighlight=p1220
I've got several similar codes as you had and a couple you didn't. My list is:
P0130:O2 sensor circuit malfunction bank 1 sensor 1 (I figure this is self explainatory as I have only had to replace one since I got the car)
P0443: Evap Emission control system Purge Valve C fault (Figured this was the ECU since you had it too)
P0705: Trans Range Sensor Circuit malfunction (PRNDL Input) (no idea, this one worries me a little!)
P1400: Manf control aux emission controls (figure this is the ECU again since you had this one too)
P1445: Manf control aux emission conrtols ( ECU again I think, same as what you got)
P1220: Manf control fuel air metering (you had this code too, but originally I didn't think it was the ECU, I figure it's my MAF sensor. Cars been idleing funny for quite sometime)
Just curious how much you had figured out about all this and if JWT had ever gotten back in contact with you about some of this stuff.
Any info would be great! Thanks man!
-Joshua
I've got several similar codes as you had and a couple you didn't. My list is:
P0130:O2 sensor circuit malfunction bank 1 sensor 1 (I figure this is self explainatory as I have only had to replace one since I got the car)
P0443: Evap Emission control system Purge Valve C fault (Figured this was the ECU since you had it too)
P0705: Trans Range Sensor Circuit malfunction (PRNDL Input) (no idea, this one worries me a little!)
P1400: Manf control aux emission controls (figure this is the ECU again since you had this one too)
P1445: Manf control aux emission conrtols ( ECU again I think, same as what you got)
P1220: Manf control fuel air metering (you had this code too, but originally I didn't think it was the ECU, I figure it's my MAF sensor. Cars been idleing funny for quite sometime)
Just curious how much you had figured out about all this and if JWT had ever gotten back in contact with you about some of this stuff.
Any info would be great! Thanks man!
-Joshua
11-27-2006, 05:49 PM
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Hahaha!! You know, I searched for threads with multiple codes as what I have and thought and thought. But that never crossed my mind!! An excellent idea, I'll do that immediately!
I'm an idiot....
I'm an idiot....
11-28-2006, 08:27 AM
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Ok, so I just erased the codes with my reader.... The P0443 Evap code won't erase! Not sure what's up with that, I haven't really heard of non eraseable codes before... Maybe this type of code is what people refere to when they need to reset the ECU?
11-28-2006, 08:56 AM
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well maybe. It's a 96 ECU modified for a 99, so it's got some issues anyway. How would I go about finding out if it's evap or ECU bugs? I'll try searching, maybe talk to JWT too. Kinda a slim subject though
11-28-2006, 09:15 AM
#7
The only way to fix those issues is to rewire the 99 spec stuff to the 96 spec stuff. All 96's are the same so it shouldnt be to hard. Youll need to modify the egr system because the 99's are electronic. Same with the evap, 99's are different also. Too bad I threw away most of the stuff needed to do this! Youll also need a 96 rear O2 sensor. I do have some of the parts still around, and while your at it you may as well loose the 99 front exhaust manifold.
I think this needs to become a sticky once more info is available. It would be nice to get the 99's an ecu with no codes.
I think this needs to become a sticky once more info is available. It would be nice to get the 99's an ecu with no codes.
11-28-2006, 01:43 PM
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Haha! Yeah warm start problem, and warm shutdown problem too! That one is exciting! Ok, well I read up on the evap problem, think I should try to change my Evap Canister and go over the vacuum lines and see if the problem is my car instead of the ECU? Or should I just try to get in touch with JWT about all this?
11-28-2006, 02:00 PM
#11
I'd call JWT. If your car ran fine and had no codes before the JWT ECU, why would you think your EVAP can and wiring all of a sudden went bad? IMO, it's the new ECU. I just hope they'll help you out since you didn't buy it from them. Some places are wierd like that. Let us know how responsive/helpful they are.
11-28-2006, 02:04 PM
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Well, the car was not idleing properly before I got the ECU put in that's why I'm concerned. I know the ECU with the 99 pulls Evap codes, but all of mine may not be from the ECU.
11-28-2006, 02:36 PM
#14
^^^ I was waiting for someone to say that!
I say pull the ECU, and get your car running right first. Then get the JWT ECU to work. JWT will have a field day with you if you tell them what you said in post #12.
I say pull the ECU, and get your car running right first. Then get the JWT ECU to work. JWT will have a field day with you if you tell them what you said in post #12.
11-30-2006, 07:41 AM
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Well, I had a bigger problem with the other ECU, that's why I justified paying for the JWT one. I'd rather not try to fix the old problem and just work on the idle issue. Most of the Evap stuff is behind the fuel tank, gonna try lifting the car and see if I can tell anything. Not real hopeful though. I didn't want this to turn into an idle problem thread, I wanted to learn what the existing bugs are for this ECU then work the car from there.
12-03-2006, 12:41 PM
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Ok some updated info.
Jon, you were right. The P0705 code is for the Inhibitor Switch for automatic transmissions. Has me thinking this ECU was from an auto.
Couldn't find the P1220 code in my ESM nor my Haynes manual
Couldn't find the P1445 code in them either, however they had P1444: Evap purge control valve and P1446: Evap vent control valve
In the ESM I found P0443 as: Evap Emission canister purge volume control valve (circuit) But it shows it on top of the engine towards the back but my car just has the "Evap emission canister purge volume control valve harness connector" I would assume that the part which the code referrs to is out back by the spare tire slot with the rest of the evap stuff.
Jon, you were right. The P0705 code is for the Inhibitor Switch for automatic transmissions. Has me thinking this ECU was from an auto.
Couldn't find the P1220 code in my ESM nor my Haynes manual
Couldn't find the P1445 code in them either, however they had P1444: Evap purge control valve and P1446: Evap vent control valve
In the ESM I found P0443 as: Evap Emission canister purge volume control valve (circuit) But it shows it on top of the engine towards the back but my car just has the "Evap emission canister purge volume control valve harness connector" I would assume that the part which the code referrs to is out back by the spare tire slot with the rest of the evap stuff.
12-03-2006, 10:22 PM
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Ok, yeah I guess my ESM is for all year fourth gens instead of just the 99 like I thought. Would the FAST help me more? And if so does anyone have an easier way of getting it than phatg20.net? that site never let me download it right. I'll see what I can dig up on the JWT ECU I have...
01-06-2007, 08:46 AM
#21
I just installed a 96 JWT ECU in my 98 and got the P1220 code also. Apparently this FPCM isn't in the 98+, or if it is it's referenced another way, and whatever the issue is causes me to run rich at partial throttle verified by my wideband. Unless it's just the jacked up JWT maps?
Wanted to bump & see if anymore insight had come from this code. Will continue searching...
Wanted to bump & see if anymore insight had come from this code. Will continue searching...
01-06-2007, 09:39 AM
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I checked my car with a better code reader than the one I have once. The type that shows you all the info of the car while it's running. The only thing I found odd was it said I was runnning advanced timing by like 7 degrees at idle and at 3000-4000 was running at 38-41 degrees advanced timing which I'm pretty darn sure is completely impossible to run with! That was a while ago and haven't been able to use that one again. I still haven't been able to really find out what the P1220 code is, my reader says it's manfacturer control Fuel Air Metering. Dealing with a cold start problem now. Seems if I clear my 4 codes she'll start up fine. Right now my codes are P0443(purge valve c fault), P1400(aux emis controls), P1445(aux emis controls) and P1220(Fuel air metering). Although I think I have fixed my idle fluctuating problem I haven't had the car running long enough to truely know.
01-06-2007, 06:59 PM
#23
P1220 Fuel pump control module or circuit fault
P1400 EGR solenoid valve or circuit fault
P1445 Evap canister purge volume control or circuit fault
P0443 Evap canister purge control valve or circuit fault
P1400 EGR solenoid valve or circuit fault
P1445 Evap canister purge volume control or circuit fault
P0443 Evap canister purge control valve or circuit fault
01-06-2007, 07:08 PM
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Haha! Alright Jon, wherever were you able to find that information? Hmm, Fuel pump control? that would probably have something to do with my new cold start problem... although I think I solved my idle issue maybe!
01-07-2007, 10:55 AM
#26
P1220 code is detailed in the 96 FSM and it has everything to do with your cold start issue. I don't understand why my car is running so much richer under partial throttle with the 96 JWT ECU. Is their program that jacked up?
01-07-2007, 11:37 AM
#27
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Originally Posted by jmeister
P1220 code is detailed in the 96 FSM and it has everything to do with your cold start issue. I don't understand why my car is running so much richer under partial throttle with the 96 JWT ECU. Is their program that jacked up?
You actually have to have a FPCM for it to cause a hard start (insufficient fuel flow) condition. This is a non-issue for 98+ vehicles.
A couple of years ago I ran a stock 96 ecu in my 98 for a period of time to make sure there were no drivability issues before I sent off another spare ecu to TS for modification. I had the P1220 and P0138 codes initially and they do not cause any problems other than a CEL.
01-07-2007, 08:18 PM
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Yay me, I got 
Owned, a 99 calispec in Maine! I mean come on!!!! Is there a 99 specific electronic FSM available or do I need to find the dealer paper version for like $100? I can't find anything for any of these codes since all my manuals go with the majority and my car certainly isn't that!
Owned, a 99 calispec in Maine! I mean come on!!!! Is there a 99 specific electronic FSM available or do I need to find the dealer paper version for like $100? I can't find anything for any of these codes since all my manuals go with the majority and my car certainly isn't that!
01-08-2007, 08:29 AM
#30
http://www.phatg20.net/modules.php?n...ownload&cid=73
take your pick
take your pick
01-08-2007, 09:18 AM
#32
P0705: Trans Range Sensor Circuit malfunction (PRNDL Input)
I didn't get that code. I only got 4 codes to my memory.Which were Evap/EGR related. I have some e-mails with info from Ben Pila at JWT I will go through and get back to you.
I didn't get that code. I only got 4 codes to my memory.Which were Evap/EGR related. I have some e-mails with info from Ben Pila at JWT I will go through and get back to you.
01-08-2007, 09:40 AM
#35
Originally Posted by ti2tmax
That would be great Zack, thank you very much!
No problem. it is a little strange howere that you have so many codes. i only had 4 if i recall correctly ( there is a thread floating somewhere). All were EGR/EVAP related.
sorry i didn't get back to you sooner i didn't see this thread. should have just pmed me.
01-08-2007, 09:53 AM
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Originally Posted by Zack342
P0705: Trans Range Sensor Circuit malfunction (PRNDL Input)
I didn't get that code. I only got 4 codes to my memory.Which were Evap/EGR related. I have some e-mails with info from Ben Pila at JWT I will go through and get back to you.
I didn't get that code. I only got 4 codes to my memory.Which were Evap/EGR related. I have some e-mails with info from Ben Pila at JWT I will go through and get back to you.
01-08-2007, 09:56 AM
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Are those evap codes common? I've never read up on them cause I've not had to worry about emissions here in Maine, I'll start looking for them. The trans sensor code is odd cause I talked with Jon and he told me it was auto transmission?? I've got a 5spd and I don't think I've added anything that would make the car think otherwise... I didn't want to bother you too much man, I just figured you were busy elsewhere and weren't visiting the org as much. Didn't want you to think I was upset with you either haha!
also, do you know anywhere to get a 99specific FSM online in either .zip or .exe? all I can find is .rar and can't open it. Thanks
EDIT: I'm no longer pulling the trans code. Here's what I have as of now;
P0443 purge control valve c fault
P1400 Manf control aux emis controls
P1445 Manf control aux emis controls
P1220 Manf control Fuel Air Metering
also, do you know anywhere to get a 99specific FSM online in either .zip or .exe? all I can find is .rar and can't open it. Thanks
EDIT: I'm no longer pulling the trans code. Here's what I have as of now;
P0443 purge control valve c fault
P1400 Manf control aux emis controls
P1445 Manf control aux emis controls
P1220 Manf control Fuel Air Metering
01-08-2007, 09:57 AM
#38
Originally Posted by ti2tmax
Oh wait, those are .rar files. I don't have anything that will open them. I'm also trying on Utorrent but that isn't downloading cause noone is on
skip the torrent and just download the 34mb files directly
01-09-2007, 06:05 PM
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P0443 purge control valve c fault
P1400 Manf control aux emis controls
P1445 Manf control aux emis controls
P1220 Manf control Fuel Air Metering
Ok, well two of these EVAP codes are the same (1008) So I guess I'm gonna have to just pony up and have to get the solenoid when I get the cash here...
P1400 Manf control aux emis controls
P1445 Manf control aux emis controls
P1220 Manf control Fuel Air Metering
Ok, well two of these EVAP codes are the same (1008) So I guess I'm gonna have to just pony up and have to get the solenoid when I get the cash here...
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