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Chri
Joined: 28 Aug 2004
Posts: 68
Location: Austria, Europe
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 Posted: Sun Jul 23, 2006 10:32 am Post subject: All about the Eprom ????? |
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Hy guy`s
I`ve a lot of questions about the eprom`s 
* How important is the speed of the eprom ? (my dealer has 150-250ns eproms)
* Can i use a larger eprom (e.g.512) or has it to be a 256kb one ?
* there are 27C256 "eprom" (M preamble) and "cmos-eprom" which one do i need, does it matter ?
* whats the difference to 29Cxxx ??? compatible ?
my plan, running a SR20 ecu on the GA16DE ...
greets Chri |
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Chri
Joined: 28 Aug 2004
Posts: 68
Location: Austria, Europe
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| Posted: Tue Jul 25, 2006 2:55 pm Post subject: |
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No one with some infos for me 
mfg Chri |
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j4play
Joined: 03 Feb 2005
Posts: 14
Location: melbourne, australia
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| Posted: Sat Jul 29, 2006 7:10 pm Post subject: |
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well, i'm no guru, so anyone correct me if i'm wrong....
* i think the stock rom is 75ns, and i hear people run 100ns ok. 150+ ns seems a little high (check www.ztechz.net for exact numbers)
* i think people do use 512 roms so that they can run two different programs.
* ? check www.ztechz.net
* ? check www.ztechz.net |
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speedlab
Joined: 09 Jan 2004
Posts: 265
Location: Land of the Long White Maple Leaf
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| Posted: Sun Jul 30, 2006 5:21 pm Post subject: |
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I have run a 200ns before with no probs.
512 works. you just need to double the image or change the start location for where you program it.
_________________
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speedlabperformance@gmail.com
Looking for ROM trades. Feel free to PM or email. |
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Chri
Joined: 28 Aug 2004
Posts: 68
Location: Austria, Europe
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| Posted: Sun Sep 24, 2006 6:45 am Post subject: |
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Finally i now have all parts together and some questions ...
Parts i have :
N14 SR20DE ECU (edit, not B13)
S13 SR20DE Daughterboard
2x SST 27SF512 Chips
Willem Programmer 5.6
* when installing the daughterboard i only need to re-solder the "jumper", right ?
* i have absolutly NO PLAN what i have to change on the SR20DE rom to adapt from the GA rom 
(as there seems to be more different than only the maps ? )
* as the daughterboard is for use with 2 chips i need to make a odd even rom, but i didn`t found usefull information for how todo  (winhex can do it, but how ? )
Are this two identical roms or is there a first and second one ?
* it seems that there are differend SR20DE ECU`s , so can i take any SR20DE rom or do i have to use the one which was original on the ECU to change
I also have a normal 2.0l Primera with 115hp , imho this rom would be better in fact as the hp difference is not as large as from the GTI (143hp)
(for values that are not known to change ...)
EDIT: * i have an additional SR20DI automatic-T ECU will it also work on the GA16DE manual-T engine ?
* additional i have two GA16DE rom`s, from the 90hp and from the 102hp version.
The interessting thing between this two roms is that there are not only the maps and other value codes differend, separatly most of the code from 0xh0f90 until 0xh6730 is also different XOR-Image (right klick "save as..." )
Maybe there are already some good hints on the net , but as i`m no guru in technic english maybe i didn`t found them jet 
 greets Chri
Last edited by Chri on Thu Sep 28, 2006 6:53 pm; edited 1 time in total |
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Chri
Joined: 28 Aug 2004
Posts: 68
Location: Austria, Europe
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| Posted: Tue Sep 26, 2006 5:02 pm Post subject: |
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No one with an idea 
Maybe someone can move it to the SR-Tuning Part
 Chri |
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hpro123
Joined: 24 Nov 2003
Posts: 50
Location: Athens, GREECE
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| Posted: Tue Sep 26, 2006 5:06 pm Post subject: |
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Out of curiosity, what makes you think yopu can actually run an SR20 ECU on the GA16? Even if the GA16 code can go in there?
Are you sure the ECU pinouts and the wiring looms are the same? Are you sure the sensors are the same?
There SHOULD be lots of differences there to make it un-worthwhile. Never heard of anyone doing it. You should better start looking for pinouts, sensros, etc. and then start worrying about transfering GA16 code in the SR20 ECU. |
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Chri
Joined: 28 Aug 2004
Posts: 68
Location: Austria, Europe
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| Posted: Tue Sep 26, 2006 8:00 pm Post subject: |
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There are some people in the USA running their partly Turbo`ed GA16DE`s on reprogrammed SR20 ECU`s because the GA16DE can`t be chipped ...
Also one or two guy`s here in this board are doing it the same way (can`t find at the moment)
 Chri |
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dave_f
Joined: 17 Oct 2004
Posts: 23
Location: Connecticut, USA
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| Posted: Wed Sep 27, 2006 11:38 pm Post subject: |
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I am running an S13 sr20DE ECU on my B13 turbo charged ga16de. The harness plugged right in.... I had to verify the pin outs and modify some of the sensors, but for the most part the ecu is interchangeable.
Jim Wolfe Technology (JWT) uses B13 sr20 ecus to tune all B13 ga16de applications. The hardest part was getting the proper ROM loaded into the chip... you have to make sure you have the proper base rom for the ECU. Also you have to make sure that the two ECUs are compatible; for instance if you’re GA has a distributor, you need a SR ecu with a distributor. Having the wiring diagrams for both vehicles will help immensely in this regard.
I hope this helped.
-dave |
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Chri
Joined: 28 Aug 2004
Posts: 68
Location: Austria, Europe
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| Posted: Thu Sep 28, 2006 6:53 pm Post subject: |
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Hy Dave
The SR20DE ECU is from a Sunny(Pulsar) N14 GTI (not B13, was a false information,but they are identical) , the year is not exactly known, but most of them here are from 91-93 ...
My Sunny(Pulsar) N14 is from 93, the euro model has no VTC (which is probably a advantage )
i`ll try the ecu sunday on my car after i have repaired the primera, not that i`m suddenly without a car
The wiring diagrams are in my repairbook, (i also get them back on sunday )
Chri |
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Chri
Joined: 28 Aug 2004
Posts: 68
Location: Austria, Europe
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| Posted: Sun Oct 01, 2006 3:35 pm Post subject: |
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I´m back with some results
Using the SR20DE Engine on the GA16DE is resulting in not starting (like getting no fuel or no ignition or something different ...)
I was able to read the error codes of the ECU with conzult:
--------------------------------------------------------------------------------------------------------
Code 11: Camshaft Angle Sensor circuit (CAS)>Car startet 0 times with this fault
Code 21:Ignition signal circuit >Car startet 3times with this fault
Code 34: Detonation Sensor circuit >Car started 0 times with this fault
--------------------------------------------------------------------------------------------------------
in my service manual there are the two inspection tables of the Ecu-connector sensors (not all pins )
(Nissan B13 and N14 Service Manual: 100NX NX1600 NX2000 Sunny Sentra GA16DE SR20DE SR20DET, ~2400 pages ...)
Most of them are identical but three are different :
GA16DE Pin 45 : Fan switch -> not listed on SR20DE pinout ...
SR20DE Pin 19 : Exhaust gas sensor -> not listed on GA16DE pinout ...
SR20DE Pin 27 : Detonation sensor -> not listed on GA16DE pinout ...
the other pins are idenitcal but partly with other voltage reference values ...
The only problem i had was that i couldn`t read the ECU rom of the SR20DE ecu, the program always stopped on suddenly during reading and the data also don`t seem to be usefull 2300-7fff.bin
Chri |
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dave_f
Joined: 17 Oct 2004
Posts: 23
Location: Connecticut, USA
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| Posted: Sun Oct 01, 2006 11:04 pm Post subject: |
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when i first started my car I got a knock sensor code, this was beacuse my ga16de did not physically have a knock sensor. I had to purchase a used sensor and wire it in to the appropriate connecotr on the wiring harness. If I remember correctly the wire for the knock sensor terminated in a connector near the tps sensor. I found the wire, and hooked up the sensor and the code went away.
I also had an ignition signal code at first... I am currently using a coil and ignitor chip from an sr20, but I am not sure if that was the original casue for the code. I am now able to run the car on either the GA or SR ignitor chip without a code.
The cam position sesnor code sounds like there might be an issue with the donor car for the ECU; GA16DE engines have their crank position sensors housed within the distributor, some sr20 cars have a distribtorless ignition and have a dedicated crank poistion sensor on the camshaft. I dont know if the two are directy interchagable. to determin this you really need the service manuals for both ECUs. Do you know if the engine for your new ECU had a distributor or coil packs?
-dave |
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speedlab
Joined: 09 Jan 2004
Posts: 265
Location: Land of the Long White Maple Leaf
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| Posted: Mon Oct 02, 2006 2:29 am Post subject: |
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Is there not a way to disable the O2 sensor?
_________________
(OO SKYLINE OO)
speedlabperformance@gmail.com
Looking for ROM trades. Feel free to PM or email. |
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Chri
Joined: 28 Aug 2004
Posts: 68
Location: Austria, Europe
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Chri
Joined: 28 Aug 2004
Posts: 68
Location: Austria, Europe
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| Posted: Sun Oct 08, 2006 3:06 pm Post subject: |
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I´m not far away going crazy with the daughterboard 
I´m already working over 7 hours on getting the SR20DE ecu running with the daughterboard, with no success.
i burned the chips many times in any format (starting from 0000,4000,8000 double the rom image to 64k, even/ood, ect) with no success.
I`m using the ecu in my room only voltage powered and reading them out with the consult interface ...
Always when i switch to the daugtherboard (to CJ2) the ecu is not responding ...
exceptet ONE TIME 10 minutes ago ! 
I was just trying again with the double rom image when it suddenly was working -> 5 seconds later the ECU was smoking
what happend : instead of wire the CJ ground to CJ2 i inadvertently connected CJ1 to CJ2 
As a result of it THIS RESISTOR was nearly burning up
But the interesting part was that after reconnecting the CJ connecting back correctly some times ground between CJ1 and CJ2 the daughterboard and ECU still were working fine 
But now after burning the chips again , the daugtherboard is not working anymore, the same like before ?
Can anyone explain what happened to the chips, or what i am probably doing wrong with the willem programmer ?
I always verify the chips after burning and the program says that they are ok
HERE is a picture of the willem programmer with the setting, and Here the Jumpertable
Chri |
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