Honda Motorcycles - FireBlades.org banner

1 - 10 of 10 Posts

·
Registered
Joined
·
10 Posts
Discussion Starter #1
hi i just bought a ecu of e.bay part numbers are
38770-mcj-671
9630-101382
keihin
can anyone tell me what this is if its a us ecu or uk thanks jonny
 

·
Super Moderator
Joined
·
32,034 Posts

·
Super Moderator
Joined
·
32,034 Posts
hi bladeracer thanks again
what doz the motorsport mean is it different to a standard unit and do i need a us wiring harness
Itryed it in the car and it wont start i dont think it even primed the fuel pump .Do you no away round the ????
much thanks jonny


I believe there is a way to modify the non-US harness by rewiring something at the ECU. I don't know what though.
You have the bank angle sensor and safety switches properly set up?
You have the original ignition with the diode in it?
 

·
Registered
Joined
·
10 Posts
Discussion Starter #5
I believe there is a way to modify the non-US harness by rewiring something at the ECU. I don't know what though.
You have the bank angle sensor and safety switches properly set up?
You have the original ignition with the diode in it?
i have no key just a push button start because it is in a race car the tilt sensor is not there i have a ecu from track electronics and it starts the car but when i plug in this new ecu it wont start
 

·
Super Moderator
Joined
·
32,034 Posts
i have no key just a push button start because it is in a race car the tilt sensor is not there i have a ecu from track electronics and it starts the car but when i plug in this new ecu it wont start

But you have put the anti-hotwire diode in the starter circuit somewhere?
Why are you trying to start it with this ECU if you have another one that works?
My guess is you need to re-wire the HISS part of the harness.
Try searching through the forum as I'm sure the details would've been posted here somewhere.
I may get a chance later on to have a look for it myself.
 

·
Registered
Joined
·
10 Posts
Discussion Starter #7
But you have put the anti-hotwire diode in the starter circuit somewhere?
Why are you trying to start it with this ECU if you have another one that works?
My guess is you need to re-wire the HISS part of the harness.
Try searching through the forum as I'm sure the details would've been posted here somewhere.
I may get a chance later on to have a look for it myself.
i dont no about the hotwire diode
iam building a new car thats why i need a new ecu
there is no hiss on my loom no key or anything like that???
in the us wiring loomis the only difference is the wire in the ecu doz everything else fit on to the uk conections ???
 

·
Super Moderator
Joined
·
32,034 Posts
i dont no about the hotwire diode
iam building a new car thats why i need a new ecu
there is no hiss on my loom no key or anything like that???
in the us wiring loomis the only difference is the wire in the ecu doz everything else fit on to the uk conections ???
The ignition switch has a zenor diode in it to prevent hot-wiring. If you remove the ignition switch then you need to wire the diode into the harness.
I know the ignition switch is wired differently and the ECU wiring is different on the US models, The California model also has an O2 sensor on it. I would just get a non-Cali US harness. Is the ECU non-Cali (A) or Cali (AC)?
The wiring diagrams are on the forum as well as I posted them some years ago.
 

·
Registered
Joined
·
10 Posts
Discussion Starter #9
The ignition switch has a zenor diode in it to prevent hot-wiring. If you remove the ignition switch then you need to wire the diode into the harness.
I know the ignition switch is wired differently and the ECU wiring is different on the US models, The California model also has an O2 sensor on it. I would just get a non-Cali US harness. Is the ECU non-Cali (A) or Cali (AC)?
The wiring diagrams are on the forum as well as I posted them some years ago.

how would i tell if it a non-cali(A) or a cali(AC) ecu
 

·
Super Moderator
Joined
·
32,034 Posts
1 - 10 of 10 Posts
Top