Another B2112 - ACC output shorted high
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Road Captain
Joined: Jul 2018
Posts: 689
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From: Kansas
Another B2112 - ACC output shorted high
Last week I found the code B2112 (ACC output shorted high) on my 2021 Road King. I cleared the code and rode about 165 miles on Saturday, did not come back. However, I rode another 50 miles on Sunday and then checked it, it came back again. I found below thread regarding this code and it stated:
https://www.hdforums.com/forum/new-r...rted-high.html
Conditions for Setting
The accessory circuit normally has power when the IGN is ON or in the ACC positions. If the accessory circuit has power when the IGN is OFF, then the BTC B2112 will set.
I have a GPS connected to ignition and a heated harness connector (never used it) that connected to battery directly.
When I turn off ignition, the GPS will stay on for about 15 seconds until it’s shut down automatically. Not sure if that caused the issue. I used the same GPS on my previous Street Bob and did not recall I had this issue. Perhaps I need to manually turn off the GPS before switching ignition to off?
Any thought?
https://www.hdforums.com/forum/new-r...rted-high.html
Conditions for Setting
The accessory circuit normally has power when the IGN is ON or in the ACC positions. If the accessory circuit has power when the IGN is OFF, then the BTC B2112 will set.
I have a GPS connected to ignition and a heated harness connector (never used it) that connected to battery directly.
When I turn off ignition, the GPS will stay on for about 15 seconds until it’s shut down automatically. Not sure if that caused the issue. I used the same GPS on my previous Street Bob and did not recall I had this issue. Perhaps I need to manually turn off the GPS before switching ignition to off?
Any thought?
Last edited by cannot; May 9, 2022 at 12:21 PM.
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Joined: Jul 2018
Posts: 64
Likes: 13
From: Sacramento
B2112 error
My 2018 Road King does the same thing. I don't know what's going on, either.
I have a PowerVision PV-2B plugged into the accessory port and an Ultra Cool Oil Cooler wired into the accessory port. Both companies tell me that it can't be their unit giving me the B2112 error code.
I understand that when you turn off your bike, the ignition is off and the alarm sets. Voltage is going to the flasher system. The ECM/BCM is set up to recognize that without errors. However, I have found that the ECM does not "like" too many Non-Harley Accessories, if any.
I removed my aftermarket Kuryakyn LED turn signals and got the Harley Bullet turn signal conversion kit for the Road King and the Harley LED Bullet turn signals. I got rid of the Hogworks LED Headlight and got the Harley one. Then, I reset the ECM and synced the 4-way flashers with the BCM. With all Harley accessories and no Ultra Cool Oil cooler or PowerVision Plugged in- no errors. ANYTHING else. B2112 error comes back (it clears, but comes back between 39-200 miles).
The bike runs fine and the PowerVision says there are no error codes when it looks at the ECM/BCM.
The only thing I can figure past the bike not liking the aftermarket parts is; that with accessories wired in, when the alarm sets, maybe voltage is present from those accessories. I'm only guessing. We need an engineer or can-bus expert for this, probably.
I have a PowerVision PV-2B plugged into the accessory port and an Ultra Cool Oil Cooler wired into the accessory port. Both companies tell me that it can't be their unit giving me the B2112 error code.
I understand that when you turn off your bike, the ignition is off and the alarm sets. Voltage is going to the flasher system. The ECM/BCM is set up to recognize that without errors. However, I have found that the ECM does not "like" too many Non-Harley Accessories, if any.
I removed my aftermarket Kuryakyn LED turn signals and got the Harley Bullet turn signal conversion kit for the Road King and the Harley LED Bullet turn signals. I got rid of the Hogworks LED Headlight and got the Harley one. Then, I reset the ECM and synced the 4-way flashers with the BCM. With all Harley accessories and no Ultra Cool Oil cooler or PowerVision Plugged in- no errors. ANYTHING else. B2112 error comes back (it clears, but comes back between 39-200 miles).
The bike runs fine and the PowerVision says there are no error codes when it looks at the ECM/BCM.
The only thing I can figure past the bike not liking the aftermarket parts is; that with accessories wired in, when the alarm sets, maybe voltage is present from those accessories. I'm only guessing. We need an engineer or can-bus expert for this, probably.
Last edited by billyo00769; Feb 10, 2025 at 07:16 PM. Reason: add photo
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