VSS and IAT sensors on Atom 2 220 with "MBE ECU"

[thomas_fr]

Hi,

i'm in the process of converting my Atom 2 "220" with MBE ECU to a Hondata Ecu,
i'm receiving soon a Honda ECU + stock K20a2 harness + k-tuned "chassis harness" (for O2 sensor, relays, fuel pump relay, ...),

but for what i already saw :

- my gearbox has no VSS (vehicle speed sensor), but if i remember, my previous Atom 2 with Honda ECU was using this sensor, can somebody with a Atom 2 "Honda ecu" confirm he has this sensor :



(near the uk driver side driveshaft output)

- i have no IAT (intake air temperature) sensor inserted behind the air filter, does somebody know if it's the standard one on Atom 2 "Honda" ?

This is the standard k20a2 sensor :



-----------------

I don't remember if my previous Atom had the black TRW "box" (near the fuel filter) :



I guess that if present, they used it for fuel pump relay.



Thanks for your informations,
Thomas.

[smokin]

i'm in the process of converting my Atom 2 "220" with MBE ECU to a Hondata Ecu,

That's a significant undertaking Thomas, I'd have a chat with the factory (if you haven't already) to make sure you don't miss something

- my gearbox has no VSS (vehicle speed sensor), but if i remember, my previous Atom 2 with Honda ECU was using this sensor, can somebody with a Atom 2 "Honda ecu" confirm he has this sensor :

Confirmed. Does yours have wheel sensors? If the dash is reporting speed then it must have a sensor somewhere.

- i have no IAT (intake air temperature) sensor inserted behind the air filter, does somebody know if it's the standard one on Atom 2 "Honda" ?

Yes, I believe it's the standard one. Does your car have a MAP sensor or a MAF sensor? If it has a MAP sensor (like the S/C cars) then an IAT isn't fitted. It may also be a combined MAF/IAT sensor, worth checking. If it's just a MAF sensor then have you checked the inlet manifold as IATs are sometimes fited there. Don't have any MBE experience so just guessing here.

I don't remember if my previous Atom had the black TRW "box" (near the fuel filter) :
I guess that if present, they used it for fuel pump relay.

I have the relay box and it's used for fuel pump and starter. I believe MBE's can drive these directly

Good luck

[thomas_fr]

yes i will have a chat with the factory, but i'm afraid it will be complicated via phone call

About the speed : yes i do have the wheel sensors, but if i remember, my 245 had this also (but it was a factory converted 220 to 245, so maybe an hybrid)

Same about MAF/MAP : if i remember, it was a MAP on my previous 245, but i must check to be sure.

Relay box : thanks, that helps