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As the Title says, I have been getting an intermittent U0141(Lost Communication with Left Hand Control Module) code.
Bike is a 2017 Road King Standard.
It usually occurs after the ABS alert clears as I am rolling down the driveway, I usually clear the code on the FP3 phone app, go for a ride, it never seemed to be a real issue.
However, yesterday, I stopped at the store, started the bike on the side stand, the security light remained solid along with the check engine light, and the Left hand controls were not operational, until I stood the bike up off the side stand, cleared the code and everything was operating normally.
I have installed the following electronics over the years that I believe could have a common path with the LHCM:
-Custom Dynamics High Mount Tour-Pak LED light
-Custom Dynamics Pro Beam Fillerz LED inserts
-NAMZ Handlebar Control Extension Harness.
I have I have physically taken apart and looked at all the connections under the seat and took off the Left hand grip. nothing appears damaged or loose.
So, my question to those with more wiring understanding than myself, would there be a single wiring path that would cause this?
Also, I realize this is a long post, but I hope I accurately described this issue.
Thank you in advance.
I hope I am describing this clearly.
As the Title says, I have been getting an intermittent U0141(Lost Communication with Left Hand Control Module) code.
Bike is a 2017 Road King Standard.
It usually occurs after the ABS alert clears as I am rolling down the driveway, I usually clear the code on the FP3 phone app, go for a ride, it never seemed to be a real issue.
However, yesterday, I stopped at the store, started the bike on the side stand, the security light remained solid along with the check engine light, and the Left hand controls were not operational, until I stood the bike up off the side stand, cleared the code and everything was operating normally.
I have installed the following electronics over the years that I believe could have a common path with the LHCM:
-Custom Dynamics High Mount Tour-Pak LED light
-Custom Dynamics Pro Beam Fillerz LED inserts
-NAMZ Handlebar Control Extension Harness.
I have I have physically taken apart and looked at all the connections under the seat and took off the Left hand grip. nothing appears damaged or loose.
So, my question to those with more wiring understanding than myself, would there be a single wiring path that would cause this?
Also, I realize this is a long post, but I hope I accurately described this issue.
Thank you in advance.
I hope I am describing this clearly.
Your bike is a CAN Buss system and the Left hand module talks to all the other modules over the CAN wires. There is also power and ground to supply power to the module. So your issue is coming from lose of power or ground, the module itself or the CAN wires. I would look at the wires an plugs at the module itself and where it connect to the main harness as a place to start.
Found the White/Red wire, which is labeled "Can High"
on the wiring diagram, halfway broken at the male JAE connector in the headlight bucket.
I broke it completely when I tried to de pin it.
I cut the R/W WIRE from the female side and soldered together.
Took a test ride, stopped and turned the bike off a few times. Issues appears to be resolved.
Thanks To Steve Cole for pointing me in the right direction.
Found the White/Red wire, which is labeled "Can High"
on the wiring diagram, halfway broken at the male JAE connector in the headlight bucket.
I broke it completely when I tried to de pin it.
I cut the R/W WIRE from the female side and soldered together.
Took a test ride, stopped and turned the bike off a few times. Issues appears to be resolved.
Thanks To Steve Cole for pointing me in the right direction.
2024 FLHP police Road King I bought new last year. 18,000 miles. I have changed handle bars (twice) and all the lights last year, and a few earlier this year. Did all the work myself as usual. Everything has worked great and is still working great so I couldn’t figure out why I’m getting that same code today that says the left hand handle bar control module is not talking to the ECM. I rode 249 miles two days ago and parked it. No check engine light. I roll out of the neighborhood today, and get a check engine light. Same code as in the post above. Everything appears to still be working.
I get the headlight out check and everything for wear or damage, then found this post. I found the red and white wire from the post above, although mine is on the female side of a plug on the left side of the frame neck sort of out of sight. I went to unplug it to inspect it and it unplugged way too easy. Or maybe I did it just right, but probably not, LOL.
I’m thinking it was loosely connected. We’ll see.
ETA- That was it. 35 miles just now and no check engine light. If the OP hadn’t pointed out that particular white wire with red strip I would have missed it because it was hiding out of my sight till I went looking specifically for that and discovered the plug not positively connected.
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Intermittent U0141 Code
