34 Daughterboards

[ed]

ok here is the daughterboard.

Hopefully I get the consult cable tomorrow and can pull the BIN files off the factory ECU.

[gtrken]

Those are the boards we use for the S14 and work well.

Expensive when bought in small amounts so the group buy will be a good thing.

How is this going and how many more do we need to sell for a cheap price.

We may get a few to help with price purchase. Have you got the address table yet?

Cheers

Ken

[ed]

Yeah, these boards work in a few cars.

I bought them from Grid Japan and will be contacting them about a discount once I have got mine in the car and working so that you guys won't have a board doing nothing.

Have not had time to pull the BIN file from my car yet

[ecl]

hey ed,

what kind of benefits are gained from getting the daughterboards especially on a stock r34?

also, could you post how much you got it tuned for?

thanks

[Dr_Drift]

ecl,

The main benefits on a stock 34 will be the ability to raise the boost cut threshold, remove the speed limiter, and retune the factory maps to suit australian fuel and conditions, typical gains on standard boost just with tuning are around 10 rwkw.

Doc.

[alizx]

thanks

[32vspecII]

will these work in a s15 too or will the be loaded with data for the 34?

if its cool for the 15 im interested . would i just take my board down to hyperdrive and they would fit it and tune ?

[3jai]

Ed,

You should have called me for this =)

Have you boys got the boards and addresses? Am i still be able to join the group-buy ?

[Gary2]

I am interested but need more info on the tuning as I don't know if anyone in Cairns could tune it and would a control handpiece like the Power FC be needed?

Sorry about my ignorance but this is all new to me.

My Stagea is currently standard but soon due a 3inch turbo back exhaust. FMIC and Turbo upgrade.

[ed]

Hi guys,

Sorry for the late reply.

Finally managed to pull the ROM file from the stock ECU (thanks 666DAN & also DUMHEAD from silviansw.com).

Now all we need is the address file for the rom or try to crack it.

Yes this board will, according to GRiD Japan, work with S14/15/ER34(RWD, 25T)/U12/C34.

I do not have the rom files for the S14/15/U12/C34 though.

I've attached the ER34 manual BIN file I pulled from the stock ECU.

[Coxy_]

Hey Ed do you need mine to get an auto one?? would they be any different??

[3jai]

Ed,

Will you still be able to get me one of these? I can help out in locating the address maps. However it is going to be impossible unless we have different binary files to compare with.

Try extracting the Auto one and see the difference. Fuel maps should diff?

[ed]

Ben, do you have a laptop with 9 pin serial?

The cable needs 9 pin serial to work.

Then we can pull the 34 GTT auto maps.

Give me a buzz.

Ricky, I've put up the manual map's. See if you can crack it

So far when I apply the ECR33 address table to the 34 BIN the only thing that is the same is the rev limiter.

7050 rpm.

[Coxy_]

cool - ill give you a call soon, I think ive got a laptop with serial

also I spoke to Hills Motorsport in castle hill, sydney yesterday and they can tune these aswell - have been selling and tuning them for a while now

[darkhalf]

the badbiki daughterboard pictured wont work with other R33/R34 (non ER34) ecus which have a Hitachi H8 chip. these need a special daughterboard which houses the H8 chip and decoder circuitry.

i am able to disassemble and create address files from binary images (things like K constant, RPM and speed cuts if not in the rom editor ADR files are a bit more tricky but not impossible)

that one posted i see maps around 1200- 2800. the VQ is 1200-127F

what is the main chip number on the ER34 ecu? ie what type of CPU

[ed]

Hope this helps you identify the CPU

[darkhalf]

yikes that was quick. yeah i need the numbers (top row) on the big chip of the ecu to do the disassembly. you can see on the second pic there are a row of holes which you solder the daughterboard to

[666DAN]

I knew there had to be a good reason why I was stock-piling these bloody R34 ECU's

OK the big chip says: LM702D01J

Pretty sure that's it, as it's hard to read

Other printed lines read-

A12-212 750

816B100

[darkhalf]

the A12 number is the JECS identifcation code. the bottom number would be serial number

the top one. LM = manufacturer code of which there are about 20 listed for LM on chipdir. i think it is probably Hitachi as most Nissan ecus are but could be anything. SR20 ecus are badged JECS but are Mitsubishi chips for example

how accurate are those digits? i know they get hard to read. best with magnifying class under fluro light at some wierd angle to read the writing properly. at worst wont if i cant get it disassembled wont get constants (rpm, k const, speed limit) only tables/maps from doing a rom compare

[666DAN]

I'm 99% sure....I did grab the fluoro and magnifying glass

The chip also has that "UJ" logo that's in the centre of the circuit board printed on it.

Whoops just figured it...Unisia Jecs! So it's a Hitachi chip