ABS code U1040 issue
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Stage II
Joined: Jun 2017
Posts: 2
Likes: 0
From: Buena Vista , Sask Canada
ABS code U1040 issue
Hi guys , looking for some help on my ABS light being on and having the U1040 code come on and after resetting this code it always comes back.
Fuse is fine and I had everything apart and all wires seem to be ok and the bike runs totally fine but the ABS light stays on
I am thinking sensor or bad ground somewhere ??
Had it in to dealer and they said their "electrician guy " was on holidays and they couldn't look at it for awhile and then said it could be several hours labour to find problem when I can get it looked at
Any help would be appreciated
Thanks
Fuse is fine and I had everything apart and all wires seem to be ok and the bike runs totally fine but the ABS light stays on
I am thinking sensor or bad ground somewhere ??
Had it in to dealer and they said their "electrician guy " was on holidays and they couldn't look at it for awhile and then said it could be several hours labour to find problem when I can get it looked at
Any help would be appreciated
Thanks
Cruiser
Joined: May 2012
Posts: 175
Likes: 98
From: Indiana
U1040 is likely a loss of communication with the ABS module (and the ECM) in your bike.
U1040 Code Possible causes:
Open ABS fuse
Open battery circuit
Open ground circuit
Open serial data circuit
Short to ground in power circuit
ECU malfunction
U1040 Code Possible causes:
Open ABS fuse
Open battery circuit
Open ground circuit
Open serial data circuit
Short to ground in power circuit
ECU malfunction
Last edited by rozemab; Aug 23, 2019 at 11:37 AM.
Supporter
Joined: Jan 2007
Posts: 15,788
Likes: 5,637
From: along the shore of Mishigami
Just curious, I know this is the 21st century and a lot of techs rely on digital techs now, but isn't there a diagnostic troubleshooting tree used any more? I know, I'm showing my age.
Club Member
Joined: Apr 2013
Posts: 7,683
Likes: 8,415
From: Utah
Yes the Electrical Diagnostic Manual gives instructions for trouble shooting codes.
That's what rozemab posted:
1 Check fuse
2 Check to see if power is making it to ABS module
3 Check to see if ABS module ground wire is grounded
4 Check serial data or CAN Bus wiring to make sure ABS Module can communicate with BCM
5 No short on the wires.
6 if all above checks out the ABS module may be bad
Basically it's saying check all wiring to make sure you have continuity from fuse to ABS, ABS to BCM, any wire shorted to to grd and ABS to Grd... No pins have backed out of connectors or pinched wires broken.
Last edited by Vernal; Aug 24, 2019 at 07:09 AM.
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