CAN BUS - for DIY swappers, HELP! Engineers / shops welcome

[geraldjust]

Originally Posted by s0sl0w

I don't know how a GM ECU came up, I'm planning on a K swap. That said:


If a 96+ swapped car is going to pass emissions in most states outside of California then it has to have a visible cat(s) underneath the car and it has to register "ready" on the OBD2 scanner test. I figure there are two ~legitimatish~ ways to make that happen. I'm not particularly interested in disregarding the spirit of the law.


Either: The OBD2 testing computer talks to a Honda ECU
1) Rewire the car with the new ECU, basically you'd be swapping the entire ecu/fuel/emissions related wiring harnesses from *x honda K* car into the BRZ. Once you've done that and got it working you'd have to reprogram the ECU to reflect the BRZ VIN. I'm not 100% certain how possible it is to reprogram a VIN to another manufacturer/model.


Or: The OBD2 Testing computer talks to the BRZ ECU
2) Successfully translate the OBD2 relevant information from the Honda (or other) ecu onto the CANBUS so that the BRZ ECU will ingest it and achieve a ready state. In short, as far the BRZ ecu and OBD2 test would ever know the car is a stock BRZ.


If I knew for certain that I could reprogram the VIN on a Honda ECU to reflect my BRZ chassis VIN I wouldn't even waste time trying to figure out option #2.

ohh wait! derp! i was thinking that you wanted to to a ls swap for some reason. my short term memory isn't as good lol.

Well from my understanding you dont need to program the vin from the Body onto the ECU. You do however need to program the vin from the engine block onto the ecu. And yeah most cars wont let you program the vin prefix from a different manufacturer.

And #2 would be at best a gray line of legality TBH..

[jhm944@gmail.com]

I have an EMS 80 after market ECU fitted to a Nissan R30 race car that in turn has Toyota 86 power steering. What I need to know is what signal(s) the power steering Control Module needs so that it functions as intended. I have spare programmable analogue and digital outputs reading from engine parameters, road speed, TPS etc.
Thanks in advance.

[rob 2fast4u]

Originally Posted by jhm944@gmail.com

I have an EMS 80 after market ECU fitted to a Nissan R30 race car that in turn has Toyota 86 power steering. What I need to know is what signal(s) the power steering Control Module needs so that it functions as intended. I have spare programmable analogue and digital outputs reading from engine parameters, road speed, TPS etc.
Thanks in advance.

The EPS should be in a default mode with +12v powered to the appropriate pins, it just won't have a speed input to adjust the stiffness

[timurrrr]

Hey folks,
There's a lot of bits and pieces of information scattered around the internet about the CAN message format in our cars. I've decided to compile it in my project on GitHub:
https://github.com/timurrrr/RaceChro...can_db/ft86.md

I've personally tested everything I could find, fixed some minor issues, added notes, discovered previously undocumented fields, etc.
If you know any more information, or find any mistakes in what I've documented on that page, please let me know! Preferably in the form of a pull request on GitHub.

[Kurt Sampson]

I have a 86, engine swapped a 3SGE Beams with a EMU Black. as far as i can tell everything works on my car like traction control ect. however after I completed the swap my fuel gauge does not register if I put some fuel in the car it would show me the correct fuel level and after driving for a while the needle would stay on one place, i would disconnect the battery and after 30 seconds reconnect the battery in order to see the current fuel level. this is the processes after every trip. is this related to the EMU not supporting fuel economy readout (1/100km)?

[pro_turbo]

My M150 plug in CAN is seems not really working all. Brcause i have a shifting problem and mid is wrong...
My car is 2015 AT
Can anyone here help me solve this issue pls

[pro_turbo]

Originally Posted by Sportsguy83

Motec is the top tier ECU. On top of CAN integration, it provides plenty many features and advanced customizations like incredibly effective traction control.

You have to sit down and think what things you NEED/WANT. If you need full CAN integration, ease of swap with the wiring figured out with a plug an play harness, go with the Pure Motec package. I have it and can attest to the Motec and plug and play features and can also confirm Pure stands by their product 100% and will be there to support you.

I've seen firsthand Element Tuning "plug and play" package with full CAN integration and it was a nightmare. Wires that did not reach the sensors, open wires that needed to be custom routed and plugs added to have basic features working and not enough inputs for critical stuff like, idle control on a cable throttle.

Yes, the Motec package is expensive. It will just depend on what value you put on almost limitless features, full CAN integration and the advantage of painfree wiring which can become a big task on a swap depending on what other option you decide to go with and how comfortable you/your shop is with wiring.

To me, after going through a swap, the extra cost as well worth it. Of course, some people don't need all the stuff Motec provides (track only car for example) and are comfortable with wiring. In those cases, it's harder to justify.

Ypu seems to be great with motec. Mine is actuly did not work well on CAN with TCU
Can you help pleasr

[wparsons]

Originally Posted by pro_turbo

My M150 plug in CAN is seems not really working all. Brcause i have a shifting problem and mid is wrong...
My car is 2015 AT
Can anyone here help me solve this issue pls

You're going to need to provide A LOT more detail to get any help...


What firmware are you running? Does it support the integration with the TCU?


What exactly are the issues you're having? Does it run at all? Does it shift at all? What do you mean by "mid is wrong"?

[pro_turbo]

Originally Posted by wparsons

You're going to need to provide A LOT more detail to get any help...


What firmware are you running? Does it support the integration with the TCU?


What exactly are the issues you're having? Does it run at all? Does it shift at all? What do you mean by "mid is wrong"?

I sent you a private msg.

[pro_turbo]

Originally Posted by wparsons

You're going to need to provide A LOT more detail to get any help...


What firmware are you running? Does it support the integration with the TCU?


What exactly are the issues you're having? Does it run at all? Does it shift at all? What do you mean by "mid is wrong"?

hello sir you still online>

[wparsons]

Why wouldn't you just post the details here so others can help too?

Originally Posted by pro_turbo

Car runs perfect runs on every firmware from v3 up to v5
No chek engine
No weird.
132whp on dyno
Problem is as i say.. the car wont shifting up when i light throttle, it happens very late. And when FT, the shifting happens without ign cut, so u can imagine the rpm ramping up then shifting happens and all sudden rpm drop down and there is big push from back very rough..
Mid is multi info display which display ur gas consumption. It read very wrong.
Please help

and my response:

Those all sound like issues with the firmware/tune. Was the firmware/tune meant for an automatic car, or manual? Whoever tuned it should be resolving those issues for you.

It sounds like whatever data the TCU needs (load/rpm likely) aren't properly available on CAN, which is likely why the display is wrong too.

[pro_turbo]

Originally Posted by wparsons

Why wouldn't you just post the details here so others can help too?





and my response:

?



It sounds like whatever data the TCU needs (load/rpm likely) aren't properly available on CAN, which is likely why the display is wrong too.

I thought it also the can bus somehow related.
That is why i enter this thread
Someone can info me what style and speed our ft86 can bus is ?
Because the motec has several option on can bus mode to switch

But
As the cluster works fine..(rpm, speed) i think motec base packages is correct.. even the fuel level and water temp is correct.
I tried compare datalogs from TCU side between using motec and stock ECU , they are identical..
Even the reading on motec software and the TCU are the same. Rpm, tps, speed
Motec claims that this plug in ecu when comes with their harness is perfect plug in..
Even andre from hpa make a review video that is perfectly working.
I tried to talk to motec.. and they now are seems also confused about this problem. And have not yet find solution for me.
I sent them datalog.. and they are no mistakes.
What did i do wrong

[wparsons]

Originally Posted by pro_turbo

I thought it also the can bus somehow related.
That is why i enter this thread
Someone can info me what style and speed our ft86 can bus is ?
Because the motec has several option on can bus mode to switch

But
As the cluster works fine..(rpm, speed) i think motec base packages is correct.. even the fuel level and water temp is correct.
I tried compare datalogs from TCU side between using motec and stock ECU , they are identical..
Even the reading on motec software and the TCU are the same. Rpm, tps, speed
Motec claims that this plug in ecu when comes with their harness is perfect plug in..
Even andre from hpa make a review video that is perfectly working.
I tried to talk to motec.. and they now are seems also confused about this problem. And have not yet find solution for me.
I sent them datalog.. and they are no mistakes.
What did i do wrong

The review showing it working perfectly, is that a manual car or automatic?

[pro_turbo]

Originally Posted by wparsons

The review showing it working perfectly, is that a manual car or automatic?

its an Auto trans... that is why i am having the late shifting right ?
whenever i use the manual shifting everything is fine..
but in D mode... its anoying... i tried to post my video on my other thread
check it out
https://www.ft86club.com/forums/show...=144399&page=2