J2534 Reflash Possibilities
Member
Joined: May 2009
Posts: 29
From: connecticant
A bit off topic but seeing how this is the thread with the most ECU hackers, I thought somewhere here might know. I was wondering if there are any hardware differences in the ECUs between Fit/Jazz models equipped with automatic transmissions and manual transmissions.
The reason why I ask is that I would like to swap an i-SHIFT transmission from a European GE6 into my US GE8. Determining what components are necessary to swap is easy enough using the electronic service manual but the main issue is going to be TCM to ECU communication. Honda has never paired its i-SHIFT transmission to the L15A7 engine, only the smaller L13A. If there are hardware ECU differences, then only option I can see to resolve this issue is to use the ECU from an i-SHIFT equipped model and remap its fuel tables to accommodate the L15A7 once reflashing becomes possible. Any thoughts on this?
The reason why I ask is that I would like to swap an i-SHIFT transmission from a European GE6 into my US GE8. Determining what components are necessary to swap is easy enough using the electronic service manual but the main issue is going to be TCM to ECU communication. Honda has never paired its i-SHIFT transmission to the L15A7 engine, only the smaller L13A. If there are hardware ECU differences, then only option I can see to resolve this issue is to use the ECU from an i-SHIFT equipped model and remap its fuel tables to accommodate the L15A7 once reflashing becomes possible. Any thoughts on this?
What do you mean by i-SHIFT mission? The only auto trannies that I was aware they use are the 5AT with paddle shifters on the 1.5l in NA and other areas and the CVT with 7speed also on the L15A here in Japan and maybe some other areas.
Was the latter what you were speaking of?
Was the latter what you were speaking of?
Member
Joined: Sep 2008
Posts: 622
From: Québec city
This was for the Neon... any gains like that on my Fit and i'm sold!!
Marko!!
Member
Joined: Sep 2008
Posts: 622
From: Québec city
Here is a quick 2nd gear run with timing and AFR. I added a new parameter called "Calc Load" which is what we've been using for subaru's for a while but this is calculated by taking (MAF * 60) / RPM, the value is then g/rev.
You can see that timing has jumped up a few degrees over the stock airbox runs, from around 19 to 22 which is great. The downside is that it's gulping fuel now which is wasteful. Up top is strange as well as it appears to be knocking, but it could also be the way that the mapping is on the stock ecu.. I'll try to reset the ecu later this weekend and get a fresh log.
As for the Air-Fuel Ratio, i think those 09 aren't Speed Density anymore... If the diameter of the K&N pipe is a little smaller then the stock air box it could fool the MAF sensor and the PCM into thinking more air is entering the motor, then what happens in reality, since the MAF would see (Example!) 1gr of air passing thru it for 10gr of air in the air intake pipe Vs. maybe 12gr in the stock Air Box Opening, and thus, enrichen the air\fuel ratio! I would get my caliper out on this one and take some mesurements!!
Marko!!
Last edited by DOHCtor; Feb 19, 2010 at 03:44 PM.
Member
Joined: Sep 2008
Posts: 622
From: Québec city
If it would help you there are no problems then!! Can a possible Reflash work for a Base Automatic Fit? I don't mind on using 91 Octane fuel!!Marko!
Last edited by DOHCtor; Feb 22, 2010 at 01:52 AM.
Member
Joined: Oct 2008
Posts: 148
From: PA
Anything different?
What amount of time does it usually take for you guys to go from knowing nothing about a ECU to being able to manipulate the data and flash as you wish if you've been in this position before? Also is the Honda ECU any harder to crack and does it use abnormal encryption or other security measures that you wouldn't expect? Im just curious, thats all. Thanks for you work you are doing!