BCM malfunction
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Intermediate
Joined: Sep 2020
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From: Hungary
BCM malfunction
Hi, I have a Harley Davidson 2014 fatboy lo. I cannot start the engine as the following error message appear.
B2121: starter output open/BCM malfunction. Does anyone have any idea how I could solve this problem? Thanks
B2121: starter output open/BCM malfunction. Does anyone have any idea how I could solve this problem? Thanks
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,185
Likes: 2,134
From: W. Texas
ˇ B2121 - starter output open/BCM malfunction B2123 - starter output shorted low you either have an issue with the starter relay, starter or the wiring associated with them OR the BCM has failed.
The battery would be associated in the wiring as well. Start with the simple stuff first.
Have you done some work on the bike lately?
WP
The battery would be associated in the wiring as well. Start with the simple stuff first.
Have you done some work on the bike lately?
WP
Last edited by WP50; Sep 10, 2020 at 01:41 PM.
Thread Starter
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Intermediate
Joined: Sep 2020
Posts: 36
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From: Hungary
Yes, I guess the problem could be that. I bought this motorbike on March. When I bought I tried to start the bike it ran for a few second then nothing happened. Since then I cannot start it again. When I had started repairing I realized the BCM and RCM modules have different number. BCM original American, RCM is European. Is it possible that after the first start the bike automatically prohibit the next start?
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,185
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From: W. Texas
Does the bike have a security system ?
Will the the engine crank but not start?
Is the battery good?
WP
Thread Starter
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Intermediate
Joined: Sep 2020
Posts: 36
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From: Hungary
Trending Topics
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,185
Likes: 2,134
From: W. Texas
Try asking your questions on this part of the forum
https://www.hdforums.com/forum/elect...ting-alarm-43/
Only found 2 threads concerning that code, neither had alot of info
https://www.hdforums.com/forum/searc...rchid=50793842
https://www.hdforums.com/forum/elect...ting-alarm-43/
Only found 2 threads concerning that code, neither had alot of info
https://www.hdforums.com/forum/searc...rchid=50793842
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Seasoned HDF Member
Joined: Apr 2011
Posts: 6,185
Likes: 2,134
From: W. Texas
What have you done so far? Oh and new battery does not always mean a good battery, not often but it has happened.
WP
If you missed it see post #6
Last edited by WP50; Sep 10, 2020 at 02:52 PM.