2008 Hayabusa ECM

L

Landmine57

Registered
My 2008 Hayabusa has a standing IAT and IAP sensor fault. I have measured the voltage at sensors 5.5 v and function tested the sensors along with resistance checks. Sensors appear ok does this mean i have a problem in my ECM. The motorcycle has done 190K how long do these last. Bike still runs ok just the F1 light is standing. I have disconnected the ECM but the F1 light reinitiates immediately. Is it ok to continue riding it like this? Thanks
 
Welcome,

Not sure of the answer but 190,000 (miles or kms) either way that's pretty impressive....

@Kiwi Rider or @Berlin Germany will be along shortly to assist I'm sure...

I've never personally heard of an ECU having an issue like that unless there was a massive surge somewhere which is unlikely...
 
no idea at the moment - sorry
gimme a day or 2 think about.

but my 1st idea was to replace both sensors one by one - can´t be that expansive

including a longer view into the gen2-manual - downloadable here
 
Disconnect the battery for at least 10 minutes to clear the codes… reconnect battery and if the FI light returns, it’s a hard fault and it’s time to try new tests to see if that identifies the problem….. you’ve already tested the sensor voltage feed and the function of the sensor (resistance) so it sounds like it may be a problem in the wire between the sensors and the ECU… check for continuity along those wire paths. Could be a damaged or crimped wire etc.
Very unlikely to be a ECU fault… sensors and continuity tests are the first place to start.
 
Last edited:
Hayabusa Wannabe said:
No work, not even the simplest thing, was recently done leading up to this problem?

Based on that answer, and I cannot recall for this bike, can the sensors at one end or the other be mistakenly swapped?
Click to expand...
Can’t be swapped, the connector couplings won’t physically reach the mount positions of the respective sensors.
Also the IAP (basically a map sensor)has a vacuum hose and the IAT (air temp sensor) is mounted in the air box and has no vac hose.
 
Last edited:
Kiwi Rider said:
Disconnect the battery for at least 10 minutes to clear the codes… reconnect battery and if the FI light returns, it’s a hard fault and it’s time to try new tests to see if that identifies the problem….. you’ve already tested the sensor voltage feed and the function of the sensor (resistance) so it sounds like it may be a problem in the wire between the sensors and the ECU… check for continuity along those wire paths. Could be a damaged or crimped wire etc.
Very unlikely to be a ECU fault… sensors and continuity tests are the first place to start.
Click to expand...
Thanks Kiwi Rider I started with continuity test and these all came out ok the voltage at sensor was ok so that also confirms wires are ok the resistance of sensors and a function test of IAP and IAT showed they were working. If I disconnect battery or the ECM the codes return on start up
 
Berlin Germany said:
no idea at the moment - sorry
gimme a day or 2 think about.

but my 1st idea was to replace both sensors one by one - can´t be that expansive

including a longer view into the gen2-manual - downloadable here
Click to expand...
Yes I was thinking to replace sensors as well but puzled why 2 sensors and continuity to ECM is ok resistance of sensors voltage at sensors and function test is ok so reluctant to just buy new sensors as I dont think this is the problem. Bike is in good condition I have owned since new and has not been modified except for slip on yusis. It has done a few kilometres at 190K now
 
Bumblebee said:
Welcome,

Not sure of the answer but 190,000 (miles or kms) either way that's pretty impressive....

@Kiwi Rider or @Berlin Germany will be along shortly to assist I'm sure...

I've never personally heard of an ECU having an issue like that unless there was a massive surge somewhere which is unlikely...
Click to expand...
Yes I would be supprised these things are pretty reliable. I am pretty attached to the bike I like it and not really interested in a new one if i can resolve problem
 
I disconnected the Battery again today but F1 returns immediately If i disconnect the IAP or the IAT the bike will not run.?
 
Kiwi Rider said:
Disconnect the battery for at least 10 minutes to clear the codes… reconnect battery and if the FI light returns, it’s a hard fault and it’s time to try new tests to see if that identifies the problem….. you’ve already tested the sensor voltage feed and the function of the sensor (resistance) so it sounds like it may be a problem in the wire between the sensors and the ECU… check for continuity along those wire paths. Could be a damaged or crimped wire etc.
Very unlikely to be a ECU fault… sensors and continuity tests are the first place to start.
Click to expand...
I have been back and continuity tested the wires for sensors back to ecm and disconnected battery for an extended time F1 fault returns immediately after starting the engine.
 
Interesting issue you have there. Unfortunately I don't have anything to add, but curious what in the world is going on with your bike. Hopefully you get it sorted soon.
 
You must log in or register to reply here.

Similar threads

B
C13 and C21 fault
Replies
1
Views
7,567
GIXERHP
GIXERHP
G
F1 Warning Light, HELP
2
Replies
28
Views
16,309
stolen417
S
arthur39
gm 3 bar sensor?
Replies
6
Views
5,538
Gixer
G
RdRcr150
Wont start
Replies
7
Views
2,641
busa bear
B
6
Bad IAP Sensor?
Replies
1
Views
5,363
65Cobra
6
Back
Top