ECM FAILURE POLL AND DISCUSSION

ECM Failure poll

  • Year 2002 thru 2007 Failure - NON Police bike

    Votes: 40 46.5%

  • Year 2002 thru 2007 Failure - POLICE BIKE

    Votes: 0 0.0%

  • Year 2008 and newer Failure - NON Police bike

    Votes: 3 3.5%

  • Year 2008 and newer Failure - POLICE BIKE

    Votes: 2 2.3%

  • Your solution: Replaced ECU

    Votes: 16 18.6%

  • Your solution: Awaiting ECU

    Votes: 2 2.3%

  • Your solution: Live with it

    Votes: 10 11.6%

  • Just looking

    Votes: 42 48.8%
  • Total voters
    86
Andrew Shadow said:
The Honda service manual states to hold the engine speed above 3900 rpm to verify if fault code 25 or 26 is triggered. ST1300 owners on this site who do have this defect in their ECM overwhelmingly have reported that as long as they maintain the engine RPM below this threshold the FI light will not illuminate and code 25 or 26 will not be set. If they exceed this threshold the FI light illuminates and code 25 or 26 is set. This would seem to confirm the 3900 RPM threshold requirement for ST1300's that is stipulated in the Honda service manual. I personally always recommend 4,000 RPM or above for no other reason than just to be sure that the engine was run at a high enough RPM to have confidence in the test result while it still meets Honda's requirement of above 3900.


The test criteria in the Honda service manual stipulates to maintain the elevated RPM for 10 seconds or more to verify if fault code 25 or 26 is present. Many people on this site who know that they have this defect have reported that it can often take longer than 10 seconds before their FI light will re-illuminate after clearing the codes. Because of these two factors I always recommend a test of at least 30 continuous seconds for no other reason than an abundance of caution and because there is no good reason not to while attempting to determine if this condition is present.
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Andrew Shadow said:
The Honda service manual states to hold the engine speed above 3900 rpm to verify if fault code 25 or 26 is triggered. ST1300 owners on this site who do have this defect in their ECM overwhelmingly have reported that as long as they maintain the engine RPM below this threshold the FI light will not illuminate and code 25 or 26 will not be set. If they exceed this threshold the FI light illuminates and code 25 or 26 is set. This would seem to confirm the 3900 RPM threshold requirement for ST1300's that is stipulated in the Honda service manual. I personally always recommend 4,000 RPM or above for no other reason than just to be sure that the engine was run at a high enough RPM to have confidence in the test result while it still meets Honda's requirement of above 3900.


The test criteria in the Honda service manual stipulates to maintain the elevated RPM for 10 seconds or more to verify if fault code 25 or 26 is present. Many people on this site who know that they have this defect have reported that it can often take longer than 10 seconds before their FI light will re-illuminate after clearing the codes. Because of these two factors I always recommend a test of at least 30 continuous seconds for no other reason than an abundance of caution and because there is no good reason not to while attempting to determine if this condition is present.
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Well, if that’s what the service manual says then that’s probably the most accurate information. Perhaps those requirements are more similar to what the CBR1100XX has as well.

The 2500rpm requirement is what the GL1800 has, and as far as I recall from my conversation with my Aquatrax expert, their minimum is the same.

I’ll be sure to use those parameters for testing any ST1300 ECMs that I am repairing.

Thank you for that information!
 
bucky123 said:
I had the dreaded code 25 /26 code on my 03 with 120K miles...
I sent it to Fred Harmon, he is known for repairing GL1800 with the same problem
He fixed my ECM and it works perfectly with 1 day turn around. Highly recommend

fredharmon@netzero.net
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I find this hard to believe. The ST1300 has a different part number for its signal conditioner than the GL1800 and it cannot be replaced as there aren’t any replacements available.

If that’s true I’d love to know how he did that.
 
TechKnowViking said:
If that’s true I’d love to know how he did that.
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I have no idea if this is the case or not, or if this is the same person or not, but there was a shop who claimed to fix this code 25/26 problem on the ST1300 but in reality what they are doing is disabling the ECM's ability to set a failure code and illuminate the FI light when this condition exists. The problem was still there just not being flagged. This actually made the situation worse in my opinion because if there was a genuine engine management problem due to knock sensor issues you would no longer know it. In extreme cases this could lead to an engine failure.

A case of treating the symptoms rather than fixing the problem.
 
Andrew Shadow said:
I have no idea if this is the case or not, or if this is the same person or not, but there was a shop who claimed to fix this code 25/26 problem on the ST1300 but in reality what they are doing is disabling the ECM's ability to set a failure code and illuminate the FI light when this condition exists. The problem was still there just not being flagged. This actually made the situation worse in my opinion because if there was a genuine engine management problem due to knock sensor issues you would no longer know it. In extreme cases this could lead to an engine failure.

A case of treating the symptoms rather than fixing the problem.
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I'm certain this is not the case, the ECM is fully functional, not disable. I have ridden this bike over 100K miles.. When the light was on, I could see small things that were different, but mainly the gas mileage.. My mileage is back to normal.
 
bucky123 said:
I'm certain this is not the case, the ECM is fully functional, not disable. I have ridden this bike over 100K miles.. When the light was on, I could see small things that were different, but mainly the gas mileage.. My mileage is back to normal.
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That is good to hear. Having possible repair options available is encouraging.
 
bucky123 said:
I'm certain this is not the case, the ECM is fully functional, not disable. I have ridden this bike over 100K miles.. When the light was on, I could see small things that were different, but mainly the gas mileage.. My mileage is back to normal.
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Just wondering if you switched to a higher octane rating gas since the repair or could there have been other repairs or a tank of fuel with some phase separation [assuming ethanol]
 
SMSW said:
@TechKnowViking has posted extensively what and how he fixes an ecm with the 25/26 failure. Do we still have no one who has availed themselves of his services for a 1300?
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Based on his response in post 183 above (quoted below) he seems to be stating that repairing the ST1300 ECM code 25/26 failure is currently not possible.
TechKnowViking said:
I find this hard to believe. The ST1300 has a different part number for its signal conditioner than the GL1800 and it cannot be replaced as there aren’t any replacements available.

If that’s true I’d love to know how he did that.
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Andrew Shadow said:
Based on his response in post 183 above (quoted below) he seems to be stating that repairing the ST1300 ECM code 25/26 failure is currently not possible.
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I read all of his posts (before I posted #188), and they are conflicting. It seems like he shoots from the hip and says things that he doesn't really know, then backtracks later. Had anyone taken him up on his 'place an order' in September, they would have been sorely disappointed.
 
Andrew Shadow said:
Based on his response in post 183 above (quoted below) he seems to be stating that repairing the ST1300 ECM code 25/26 failure is currently not possible.
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Yes, this was confusing to me also, he offers a service to repair the ECM for a ST1300, but in this post said parts are not available.
I am not an expert on ECM repair... All I know is I had a failed ECM and sent it to the guy who is the expert on repairing the GL1800 ECM and he fixed my ECM for my 03 ST1300. The symptoms on an GL and ST are similar, its logical the same fix works. Fred did a lot of work to figure out how to repair the GL1800 ECM and that work has helped the St1300.
I guess the hardest part is to know where to cut in to the ECM to access the components to replace. I'm very happy with my ECM repair... someone can criticize was it disabled.. or its not possible.. All I know is my ECM is been repaired and is working correctly. Having options to get the ECM repaired is great for us to have.... if not, most ST1300 will be dead because of this issue.
 
bucky123 said:
All I know is my ECM is been repaired and is working correctly. Having options to get the ECM repaired is great for us to have.... if not, most ST1300 will be dead because of this issue.
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That is an encouraging outcome. If ever I face this it would be good to have a repair option.
 
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