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Hacking up Honda's ECU
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 Post subject: is this dead now?
PostPosted: Mon Dec 03, 2012 12:58 am 
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Joined: Sat Feb 16, 2008 11:36 pm
Posts: 255
it seems like this forum is not moving ahead as it was few years ago.

when i was here in 2005-2006 this forum was pretty exciting. all the news and new developments.

now its like a fish out of the water.

and bunch of people that just got here wondering wtf is going on.

it looks like right about that time with hondatai issues is when this forum lost its momentum and alot of the softwares stopped development.



freelog crome, uberdata and stuff are all outdated and unsupported.

i took a long brake about same time when hondatai deal was goin around because i didnt have a honda and now that i got back in its not the same...

everything is commercial or unsupported

and crome is just updated on autopilot without any real news of any kind of feedback from john cui


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 Post subject: Re: is this dead now?
PostPosted: Mon Dec 03, 2012 3:33 am 
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Joined: Thu Sep 15, 2005 2:29 am
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Location: Dublin
Glad you noticed


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 Post subject: Re: is this dead now?
PostPosted: Tue Dec 04, 2012 2:25 pm 
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Posts: 479
it's old. there's not much we can do anymore that hasn't already been done, so there's nothing to talk about, and nothing to update. Cobb & Hondata have cornered the market on new programming, so unless you have a great lawyer then nothing open source will happen for that either.


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 Post subject: Re: is this dead now?
PostPosted: Tue Dec 04, 2012 2:40 pm 
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PGMFI Elf

Joined: Tue Jul 27, 2004 2:17 am
Posts: 1413
Location: Phoenix, AZ
They don't actually have the market cornered. There's something new that dealers are getting their hands on that's been in testing for some time. It's currently running quite a few K swapped vehicles.

Why do you think you need a lawyer to develop an open source platform? There's also nothing preventing any of you from using something like the OpenPort 2 or other ready made products to reflash newer Hondas. Don't tell me you're afraid to do anything because Hondata might sue you. :)


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 Post subject: Re: is this dead now?
PostPosted: Tue Dec 04, 2012 4:54 pm 
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u talking about the haltech?


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 Post subject: Re: is this dead now?
PostPosted: Tue Dec 04, 2012 5:55 pm 
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tenshi_R wrote:
u talking about the haltech?


No, stock ecu


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 Post subject: Re: is this dead now?
PostPosted: Tue Dec 04, 2012 8:21 pm 
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Joined: Tue Jul 27, 2004 2:19 am
Posts: 653
Location: France
tenshi_R wrote:
it seems like this forum is not moving ahead as it was few years ago.

when i was here in 2005-2006 this forum was pretty exciting. all the news and new developments.

now its like a fish out of the water.

and bunch of people that just got here wondering wtf is going on.
The developers on the forum for many years have marrent that most other people only come to copy or use their work without their participation level.
So, these developers now communicate only among themselves and not in public.

:evil: When we look at the title of topics like:
- I do nothing but I want .......... :roll: ...............
:arrow: example :http://forum.pgmfi.org/viewtopic.php?f=45&t=23457
First message, no presentation of the person but I want ....................... :shock:


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 Post subject: Re: is this dead now?
PostPosted: Mon Dec 10, 2012 6:39 pm 
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Joined: Wed Nov 14, 2012 11:03 pm
Posts: 15
Not dead to me.

Have a look at my craptastic data logger. It works.

https://picasaweb.google.com/1110657354 ... talogging#

I'm looking at the numbers for spark advance....it is normal to have up to 45 degress of advance at cold start and at high RPM? Cause that's what I'm getting from offset $26. Raw number maxes out at 210, so by the formula that's (210 - 24)/4. 46.5 degrees.
At idle its 16.5. I checked with at timing light and it sure seems like cold start is way over there. I mean, if there's about an inch or so between the three timing marks and TDC and that's 16 degrees, you can definitely see high RPM advance well beyond two inches past the TDC mark. Got me?

Anybody have any more complete, verified maps of the stock memory offsets?

Best I can find is

download/file.php?id=3916


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 Post subject: Re: is this dead now?
PostPosted: Wed Dec 12, 2012 4:40 pm 
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Senior Developer

Joined: Tue Jul 27, 2004 2:19 am
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Location: France
Andyz,
The formula for the value of advance is follows (Honda DLC link connector):
(DecValue x 0.234375) - 4.95

Example :
DecValue = 64 (40h &) => 10 °
DecValue = 240 (& F0h) => 51.3 °

I made the check of the formula with the Honda HDS system (hardware + software)


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 Post subject: Re: is this dead now?
PostPosted: Wed Dec 12, 2012 4:45 pm 
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Andyz wrote:
Best I can find is
download/file.php?id=3916
I think I recognize this file :D :P

Other calibrations:
Offset 18h = ALTF in % => DecValue / 255 * 100
Offset 20h = Coef CorCT => DecValue/128
Offset 22h = Coef CorLT => DecValue/128
Offset 24h (word) = Injection Time in ms => DecValue * 0.004
Offset 29h => Ctrl_IACV in mA = DecValue * 3.125


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 Post subject: Re: is this dead now?
PostPosted: Thu Dec 13, 2012 2:00 am 
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Joined: Wed Nov 14, 2012 11:03 pm
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Good stuff.

$19 and $1C seem to be the same thing, but I don't know what. See link for picture.

https://picasaweb.google.com/1110657354 ... 2843883138


$28  and $2A are something

The rest seem pretty much always 0.

Also, I get only zeros for $27, supposed to be ignition advance #2. Not sure what #2 means in this case.


Corr CT? Is that C(orte) Term fuel trim?. No Thats Spanish. :)

I think I'd rather do those in 'notches' or 'points'.
So,  treat the value as a signed integer, then report the notches plus or minus.  
It seems I should be able to add the short term and long term together to get the current total fuel trim.  One would assume the units are the same? No? Could the long term have a multiplier?


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 Post subject: Re: is this dead now?
PostPosted: Thu Dec 13, 2012 11:09 am 
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Joined: Tue Jul 27, 2004 2:19 am
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Location: France
Yes $19 & $1C in TableDLC is the same :
Voltage from ELD sensor.
Voltage = DecValue /255 * 5
At ths time, I did not investigate the relationship between sensor voltage and the measured current.


$28 in TableDLC : Control of the drive current IACV
Image

I have no information about $2A TableDLC

$27 TableDLC (Adv2) is Knock retard when the engine have knock sensor.

Sorry, CorCT is fuel correction in the short term and CorLT is fuel correction in the long term
These corrections are calculated with the lambda sensor in closed loop mode.
Example :
if Injection time is 20ms
if CorCT=#90h=144 => Coef=144/128=1.125 => Final injection time=20*1.125=22.5ms
if CorCT=#60h=96 => Coef=96/128=0.75 => Final injection time=20*0.75=15ms
if CorCT=#80h=128 => Coef=1 => no correction
Same for CorLT


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 Post subject: Re: is this dead now?
PostPosted: Thu Dec 13, 2012 12:18 pm 
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Posts: 15
dip wrote:

Offset 29h => Ctrl_IACV in mA = DecValue * 3.125


So, should this current jump around with RPM changes? I guess I'm not clear on exactly the role of IACV in non idle operation.


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 Post subject: Re: is this dead now?
PostPosted: Thu Dec 13, 2012 12:30 pm 
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Posts: 15
dip wrote:
Yes $19 & $1C in TableDLC is the same :
Voltage from ELD sensor.
Voltage = DecValue /255 * 5
At ths time, I did not investigate the relationship between sensor voltage and the measured current.

Sweet sweet..

dip wrote:


$28 in TableDLC : Control of the drive current IACV
Image


So $28 and $29 are the same? Or NO, one is control and the other is monitoring?

dip wrote:
$27 TableDLC (Adv2) is Knock retard when the engine have knock sensor.

Sweet again

dip wrote:
Sorry, CorCT is fuel correction in the short term and CorLT is fuel correction in the long term
These corrections are calculated with the lambda sensor in closed loop mode.
Example :
if Injection time is 20ms
if CorCT=#90h=144 => Coef=144/128=1.125 => Final injection time=20*1.125=22.5ms
if CorCT=#60h=96 => Coef=96/128=0.75 => Final injection time=20*0.75=15ms
if CorCT=#80h=128 => Coef=1 => no correction
Same for CorLT


So is the injector word from $24 already adjusted for these?.... Is the value at $24 the FINAL , actually actuated pulse width?

And, the RPM need not be take into account unless you want duty cycle?


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 Post subject: Re: is this dead now?
PostPosted: Thu Dec 13, 2012 1:32 pm 
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Senior Developer

Joined: Tue Jul 27, 2004 2:19 am
Posts: 653
Location: France
Andyz wrote:
So $28 and $29 are the same? Or NO, one is control and the other is monitoring?
Sorry, my mistake, I correct my last post
Yes, control IACV is $29
I have not studied $28 and $2A

Andyz wrote:
So is the injector word from $24 already adjusted for these?.... Is the value at $24 the FINAL , actually actuated pulse width?
And, the RPM need not be take into account unless you want duty cycle?
Yes $24 directly controls the timers that drive the injectors.

Code:
$0306h = $24 Table DLC

L02FE:   L     A, 0306h[X1]
   JEQ   L0324
   ST    A, ER1
   DI
   L     A, 0426h[X1]
   ST    A, ER0
   L     A, TM0
   SUB   A, TMR0
   ADD   A, #0004h
   CMP   A, ER0
   JGE   L0315
   L     A, ER0
L0315:   ADD   A, TMR0
   ST    A, TMR4[X1]
   ADD   A, ER1
   ST    A, TMR4BF[X1]
   RB    RTOCON0[X2].1
   EI


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