BCM malfunction
Thread Starter
|
Intermediate
Joined: Sep 2020
Posts: 36
Likes: 0
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? I have checked battery but it is working well I can use it for another bike. I have also checked relays and wires it seems everything is working well, just I cannot start the engine.
The bike has got American BCM and European RCM, could this be the problem?
Thanks
B2121: starter output open/BCM malfunction. Does anyone have any idea how I could solve this problem? I have checked battery but it is working well I can use it for another bike. I have also checked relays and wires it seems everything is working well, just I cannot start the engine.
The bike has got American BCM and European RCM, could this be the problem?
Thanks
Outstanding HDF Member
Joined: Feb 2015
Posts: 2,414
Likes: 433
From: Arkansas
According to the parts fiche only one model of each, no domestic and international versions. Looks like a BCM issue though. There are 2 models of BCM, base level and security so double-check the part number.
Cruiser
Joined: Aug 2016
Posts: 247
Likes: 59
From: California
Have you checked that the trigger wire to your starter is plugged in? Single Red/Black wire running into starter? If so, the flow chart is basically check if you have voltage at the starter, on the wire I just referenced when you are pressing the starter button, if yes, then it would be a starter solenoid issue. If no, they have you check voltage at the BCM that feeds that wire, however the only way I recommend doing that, is with a breakout box. From there, it's either a broken/cut/pinched Red/Black wire from the BCM to starter if voltage is present, or it's a bad BCM if not. Because it's throwing this code, it is receiving the signal from the Start button, so its not a switch issue.
Thread Starter
|
Intermediate
Joined: Sep 2020
Posts: 36
Likes: 0
From: Hungary
Have you checked that the trigger wire to your starter is plugged in? Single Red/Black wire running into starter? If so, the flow chart is basically check if you have voltage at the starter, on the wire I just referenced when you are pressing the starter button, if yes, then it would be a starter solenoid issue. If no, they have you check voltage at the BCM that feeds that wire, however the only way I recommend doing that, is with a breakout box. From there, it's either a broken/cut/pinched Red/Black wire from the BCM to starter if voltage is present, or it's a bad BCM if not. Because it's throwing this code, it is receiving the signal from the Start button, so its not a switch issue.
Thread Starter
|
Intermediate
Joined: Sep 2020
Posts: 36
Likes: 0
From: Hungary
My mechanic told me there is no security in the bike.
Cruiser
Joined: Aug 2016
Posts: 247
Likes: 59
From: California
I didn't think it was a switch issue, but did you check that everything is plugged in, and voltage at the starter trigger wire when the start button is pressed? What I have described is the flow chart to diagnose the code you have, while you may not have a breakout box for the 2nd part of the testing, you should be able to do the first part with a test light, although a multimeter is always ideal to see actual voltage.
Seasoned HDF Member
Joined: May 2008
Posts: 21,201
Likes: 12,786
From: South Carolina
What is the story of this bike?
Did this issue just happen?
Has this bike run properly with the BCM that is currently installed?
Did this issue just happen?
Has this bike run properly with the BCM that is currently installed?
Trending Topics
Thread Starter
|
Intermediate
Joined: Sep 2020
Posts: 36
Likes: 0
From: Hungary
The story is that we bought it in Poland last year. It is originally from US. There is an original BCM inside but the Polish guy swap the RCM to European. We tried starting the bike in Poland it had sounded as if the engine started. Since this first start the engine is not working. All lights and oil pump and everything is working. After pressing the start button this error code appear. We have checked all wires, relays and we have no more idea what to do.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
