V7 II: Installing an On/Off Switch for ABS

[Dirk_S]

I ride off-road occasionally (is that yawn-inducing by now?). Traction control and ABS can get in the way when riding on dirt. Like many ABS-equipped bikes, the V7 II doesn’t have an easy way to temporarily cut off ABS as it does the traction control, which you can do by simply holding the starter button in for a second. The only way I know to temporarily turn off ABS is to remove the 20A fuse (G in the diagram), but when I pull the fuse, it appears to turn off the odometer, speedometer, and maybe more. I’m rather proud of every recorded mile that I tack on the machine, and prefer to keep that data recording intact. Not sure of an easier method to briefly cut off ABS, so I figured I’d splice in an inline on/off switch. Does anyone know how I can keep the odometer and speedometer rolling with the ABS switched off?

[Motormike]

Removing the sensor should cause the ABS to disable, but of course it will throw a code and illuminate the warning light.  (Red triangle of death?)  So it just depends on how much nanny nonsense you are willing to put up with. 

[Dirk_S]

Removing the sensor should cause the ABS to disable, but of course it will throw a code and illuminate the warning light.  (Red triangle of death?)  So it just depends on how much nanny nonsense you are willing to put up with.

Right, and that's totally fine, because I only intend to disable it on off-road excursions. not permanently. My issue is that when disabled, it also appears to cut the odometer and speedometer. I'm curious if that's the case with all the V7s, or if I might somehow have another issue going on.

Edit: I'm not against having ABS, on road, and am just looking for a way to disable it easily without the clocks blacking out on me.

[Kiwi_Roy]

I believe the speed is derived from the rear wheel sensor so you won't want to disable that.
Instead of removing the sensor you may be able to disable it with a thin metal strip between wheel and sensor.

[twowheeladdict]

Right, and that's totally fine, because I only intend to disable it on off-road excursions. not permanently. My issue is that when disabled, it also appears to cut the odometer and speedometer. I'm curious if that's the case with all the V7s, or if I might somehow have another issue going on.

Edit: I'm not against having ABS, on road, and am just looking for a way to disable it easily without the clocks blacking out on me.

Can you locate where the ABS actuator module is?  If so, see if you can just unplug power to it which might leave the rest of the fused circuit in place.  Without a wiring diagram I can't say what other issues may happen, but that might isolate the ABS from the speedo and odo.

[Dirk_S]

Appreciate the help so far. I took a closer look at the wiring diagram. I see the speed sensor appears to be attached to the ABS module? Maybe that’s why pulling the fuse shuts that off as well…

[fotoguzzi]

Something about this idea troubles me. Can turning off ABS with no other effects really be as simple as a switch?

[twowheeladdict]

Appreciate the help so far. I took a closer look at the wiring diagram. I see the speed sensor appears to be attached to the ABS module? Maybe that’s why pulling the fuse shuts that off as well…

As an experiment, I would remove the front wheel speed sensor, or put tape over it and see what happens.  It will either see a difference between the front and rear wheel and activate ABS as soon as you hit the brakes, or it will see it as a fault and disable ABS. 

[Kev m]

Something about this idea troubles me. Can turning off ABS with no other effects really be as simple as a switch?

Not sure your intent here.

I mean there are a number of motorcycle ABS systems that can be shut off temporarily (mostly for off-road use). That goes back to my 96 R1100RSA (and I'm sure before). Modern bikes include the CRF250RLA I'm writing about now that includes a Rear ABS Cancel button.

But you may already know all this.

If you do then you're asking if he can do this without causing other problems. Maybe, it's all programmatic. Pretty much all ABS systems suspend ABS function when there is a fault so Dirk's idea is solid. Introduce a fault that will force the ABS system to suspend operation while also continuing to share data with the ECU and meter so things like the speedo still work.

[Brand X]

I will say i like my KTM setup over the V7ii It has ABS on/ABS off, and Super-Moto setting (Rear ABS off)Down side you cannot upload different maps to the ECU like Guzzi-diag allows  You can never have it all it seems..

[Dirk_S]

Thread’s a couple years old, but I think an update is worth adding on.

I’ve confirmed a couple times now that you can simply pull the front wheel speed sensor to deactivate the ABS on at least the V7 II and III. When I recently installed the 21” front wheel and NTX forks to my V7 III, I forgot to consider the speed sensor mounting, so I just tied it up out of the way. Been a hoot up here the past couple months, as coastal Maine has been dealing with more dreary days than usual, giving me ample practice time skidding the rear wheel on wet roads (seriously—good practice).

I’m still considering adding an inline switch, but also removing the ABS entirely. I imagine this could affect an insurance claim if I’m ever in an accident, but that’s an argument to be had with my imaginary partner.





But, a question remains—Will the ECU be negatively affected or become damaged if I remove the ABS system?

[Perazzimx14]

If the ABS can be deactivated buy removing a fuse you can install one of these switched fuse dodads


https://www.googleadservices.com/pagead/aclk?sa=L&ai=DChsSEwjs2dyJxryNAxWtMwgFHQIXFtsYACICCAEQChoCbWQ&co=1&gclid=EAIaIQobChMI7Nncica8jQMVrTMIBR0CFxbbEAQYASABEgKmE_D_BwE&sph=&ohost=www.google.com&cid=CAASJeRoUKw6er7jI6ja72YUrBDZ6e3OSRvwq4_2ld3eiW-Q46qSYvw&sig=AOD64_14wl7fS8z6vrvX08uww3y-8r-uug&ctype=5&q=&ved=2ahUKEwjqotWJxryNAxU7AHkGHXUmBfIQwg8oAHoECAUQDQ&nis=8&adurl=

[Dirk_S]

If the ABS can be deactivated buy removing a fuse you can install one of these switched fuse dodads

https://www.googleadservices.com/pagead/aclk?sa=L&ai=DChsSEwjs2dyJxryNAxWtMwgFHQIXFtsYACICCAEQChoCbWQ&co=1&gclid=EAIaIQobChMI7Nncica8jQMVrTMIBR0CFxbbEAQYASABEgKmE_D_BwE&sph=&ohost=www.google.com&cid=CAASJeRoUKw6er7jI6ja72YUrBDZ6e3OSRvwq4_2ld3eiW-Q46qSYvw&sig=AOD64_14wl7fS8z6vrvX08uww3y-8r-uug&ctype=5&q=&ved=2ahUKEwjqotWJxryNAxU7AHkGHXUmBfIQwg8oAHoECAUQDQ&nis=8&adurl=

Cool piece of kit, but the ABS fuse is also the gauge cluster fuse. When it’s disabled/removed, it’s all dark upstairs—no more speedo, tach, etc.—hence the focus on disabling the front sensor.

[Kiwi_Roy]

http://www.thisoldtractor.com/guzzi007/schematics/2015_V7_II_Racer_ABS%2C_V7_II_Special_ABS%2C_V7_II_Stone_ABS.gif

It looks to me that if you pull the 20 Amp fuse you will lose speed signal for sure, that's the fuse that also powers the speed sensors. (47), (48)
Update
The ABS unit pin 6 feeds speed signal to the dash pin 17
So you will lose speed and distance by turning off the ABS

[Bulldog9]

Rather than messing with sensors etc, why not wire a switch into the power supply line to the ABS unit?

No idea how the ECU would react to a dead abs unit, but a simple snip of the power feed Wire would tell you easily enough.

Million if it doesn't trigger all kinds of other issues making the bike unridable, you could then wire in a switch mounted to the handlebars to turn power to the ABS unit on or off as desired.