6G Celicas Forums

I got this unit from Martin ( thanks a lot )
there is not much documentacion on it, manuals or how to tune it, so after a lot of reading bits and pieces all over the place, I got some info and wanted to share in case one of you get your hands on one.

This unit is silver not gold, the gold ones are full stand alone, this silver unit is not programmable outside Japan




when you remove the black plastic cover you get this



there are 9 switches

the switches from 1 to 4 control ignition and fuel, the others are not used unless you have an extra controller or HKS wideband

taken from Malpaso's sale thread

default setting is:
| 1 on | 2 off | 3 on | 4 off |

switch 1 and 2 modify the map for fueling, 3 and 4 modify ignition. both sections work similar:

map 1: | 1/3 off | 2/4 off | (less)
map 2: | 1/3 on | 2/4 off | (default)
map 3: | 1/3 off | 2/4 on | (more)
map 4: | 1/3 on | 2/4 on | (much more)

after I played with this setting still couldn't get it to work on my car, it was running super rich ( 10.1 ) at idle so I kept investigating, and here is where I made the big finding

there are other switches INSIDE it, that change the fuel curve to compensate for elevations and bigger modifications like turning the boost super high, upgrading turbo, installing cam gears and such


lose the 4 screw on the top cover


cover removed


carefully flip the upper panel


look at the switches on the right corner


close up

I found a site that list the siwtches to apply for the following

1- exhaust modification
2-Air Filter
3- air filter + Exhaust
4- 3 + 9 psi of boost
5- 3 + 11 psi of boost
6- 3+ 12 psi
7- 3+ cams 9 psi
8- 3+ cam hybrid turbo 10 psi
9- 8 + 12 psi

this is not confirmed yet, but bottom line is the higher number the richer the overall mixture will get, so if running rich ( like my case ) turn it to a lower number one at a time till desire results achieved.
when none of the switches are press is consider zero which is stock fuel curve.

when I opened mine is was everything on, I turned everything off and turn 4 on, once it stops raining I'll plug it in the car and enjoy the results ( fingers crossed )

thats AWESOME! good work on the research stevenson!
really looking forward to seeing this in action!!

I have more info which is really helpful, but is all in acrobat format so it has to be typed little by little, I'll add it in a big post later

good stuff man turn them all on lol and get some cams!!!

Wow this is some good info man. Looking forward to see what else you post up!

ok, so this guide has help someone already, but unfortunately not me, after talking to some other owners, it appears that mine lost its memory somehow, so maybe during shipping something happened or even something I did myself to it, God knows, but there are no maps stored within.

the guide does work as I expected it ( in another unit )

now, the next step is re-mapping mine, I'll be doing this myself, I found an (un) reliable source for the software and HKS unit to PC cable.

on the defualt setting this unit yield ~ 22 whp extra compare to the same setup (stock engine with intake and exhaust ) with stock ECU, unfortunately I don't have the dyno sheet of that yet, as my friend is lazier than me .

Yummy
Good luck with it Culp!

hi mate was wondering if you still had the software for mapping this unit

no I dont, I never ordered it, the guy who sells it is in Japan, and was very slow on getting back at me ( over 3 weeks for ) so I was hesitant about sending the cash for the software.

Thank's for the reply mate

im pretty sure these use a their own map sensor to monitor boost, ill let you know, i just bought the same ecu for my gt4 and it should be here next week

they dont use a separeta map sensor, this unit relies on the stock sensors. is just a piggyback pre tuned for the ST205, mine aparently lost all its data during shipping, as it was working fine before it was shipped to me. I've been meaning to get it re-tune but have been lazy about looking for a software to play with it.

you should have a 3 wires that are yellow, blue and green, and that is where you plug a map sensor in, so the ecu can monitor boost, you need this.
this is the one i bought http://www.ebay.com/itm/Pressure-Sensor-MA...f#ht_1457wt_878

that's interesting, I'll take a look at my harness and see, but on the installation manual is list this as an optional accesory ( not needed for this to work )

can you do a test for me ?

install it without the sensor and see how it runs, then plug in the sensor and note the changes, if yours behaves like mine does ( without the sensor ) and then becomes normal after the sensor is installed, I'll order the sensor right away.

yea, for sure, im going to play with it tomorrow . this helped me a little bit too, its for a fd rx7 but essentially the same http://www.fd3s.net/fcon_install.html

I'm running one of these too, great piece of kit !!!