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[De buurman]

Hello,

Hello, my name is Mark Bouma from the Netherlands.
I'm driving a zero DSR 2016 for almost three years now and use it almost every day to and from work a 100 km a day. And I love it.
In rain, hard winds, sunshine, it always works perfectly and never any troubles.
Now I'm having this problem with my ABS.
When the garage connects the motor to the computer there are no faults. So I guess the sensors are OK.
After a very long time they came up with the idea that it might be the wrong tyres.
But I've been looking everywhere and have not found any comments about people having the same problem and I do read about bikes using a different set of tyres as directed by zero.
I would like to know wether it is possible for the abs to malfunction with a slightly different set of tyres.
The ABS light goes off when I start to drive, when I use the rear brake its feels like it's using the ABS.
Then after about 500 m the ABS light goes on.

The kind of tyres I'm using are in the front: Avon Roadrider AM26 100/90-19 57V
And in the back: Avon Roadrider AM26 130/80-17 65V
The reason I'm using these tyres is that I'm only using the bike on the highway on my way to work so I don't want to put the enduro tyres on the bike. I think the comfort is a lot less with these tyres or am I wrong.
So the questions are:
Can the malfunction of the ABS be caused the wrong tyres?
What tyres could I use other than the enduro one's?
If it's not the tyres what could else could it be.

Hope someone had the same problem and can help me out with this.

[TheRan]

Vastly different sized tyres (a small difference from stock is usually fine), or even different sized wheels, could cause an issue if the bike wasn't reprogrammed for the new size. However your tyres are the same size as stock so that's not the issue. Other than sizing there's no other way the tyres could affect the ABS system, unless the rear was so slick that you were just doing rolling burnouts all the time.

You could try downloading the logs and having a look to see if they go in to any more detail as to why the ABS light is lit, however I think the last time I looked at mine it just gave a generic "ABS fault" message. The easiest thing you can do to start is to clean the ABS rings and sensors on both wheels and check them for any visible damage as well as check the cables running from the sensors.

[DonTom]

Hope someone had the same problem and can help me out with this.

Don't assume the tire / tyre size change caused your ABS problem. The ABS  sensors can become flakey and perhaps it happened while  removing the wheels.

It happened to me. Each ABS sensor should measure around 50 K-ohm. See here.

-Don-  Auburn, CA

[Richard230]

The most likely scenario is that you didn't get the ABS sensor installed correctly at the wheel sensing ring when you reinstalled the wheel. It might be too far from the ring or not aligned properly or the wiring to the sensor became disconnected. 

[De buurman]

Thanks for all the info. Just what I thought.
There's one thing I forgot to mention, the ABS module makes a funny noise when the light is off for the first few hunderd meters.
I'lll try to attach a soundfile. I've never heard that kind of sound coming from my bike.
Also I measured the resistance of the sensors, the rear one doesn't give the desired value.
I told them at the garage but they keep on tellling me the computer reads no faults, so there's no malfunction in the sensors.
So I'm wondering could the reading be wrong. Maybe I just put in a new one to be sure.

[Richard230]

With most of my ABS bikes I hear a kind of rattle after I start rolling for about 50 meters and the ABS warning light turns off.  I think they all do that, sir.    But the noise only lasts for about a second, so I don't know what to make about your noise if the sound lasts much longer than that.  Just because the computer hasn't picked up a fault, doesn't mean that there isn't one, in my experience.

[ultratoad]

I've even seen front wheels installed backwards, putting the sensor ring on the wrong side of the pick-up!

[DonTom]

Thanks for all the info. Just what I thought.
There's one thing I forgot to mention, the ABS module makes a funny noise when the light is off for the first few hunderd meters.
I'lll try to attach a soundfile. I've never heard that kind of sound coming from my bike.
Also I measured the resistance of the sensors, the rear one doesn't give the desired value.
I told them at the garage but they keep on tellling me the computer reads no faults, so there's no malfunction in the sensors.
So I'm wondering could the reading be wrong. Maybe I just put in a new one to be sure.

ABS info. is not detected by the computer. The ONLY symptom is the ABS light on while riding. What is the resistance reading (in ohms) on the rear sensor?  If it's far from ~50K-ohm, you found the problem.

-Don-  Auburn, CA

[De buurman]

Thanks, the resistance is way off the 50K ohm. OK first thing I'm going to order is a new sensor.
I'll let you if this is the solution.

[Crilly]

When taking wheels off you have to remove the abs sensor first and put it back last.  They are to easy to damage.

[De buurman]

OK, just did a double check and it turns out both sensors are ok.
The rear one is 48.7 k and the front 52.6 k
So I'm at a loss here, anyone got some more suggestions.

[DonTom]

OK, just did a double check and it turns out both sensors are ok.
The rear one is 48.7 k and the front 52.6 k
So I'm at a loss here, anyone got some more suggestions.

How sure are you it was far from 50K-ohms the first time you checked it?

Go for a ride, make sure the ABS light still will not go out and then test the sensors again.

Mine was intermittent. It even occasionally  tested okay on an ohmmeter. I checked it several times after I removed it, also causing me some doubts if it was the real problem. But since I replaced my front wheel sensor, the ABS has always worked perfectly.

FWIW, mine front wheel sensor failed before I ever removed the wheel or anything.

But vibration and such seemed to effect it.

-Don-  Auburn, CA

[De buurman]

First time was around 10, checked it twice now and still okay.
Isn't there a way to check the module? I'm wondering about the noise, it doesn't stop till the abs light goes on.
Also the rear brake is braking like the ABS is doing it's job. Till the light goes on, then it brakes okay.
I'll keep on checking the rear sensor. See if there's a change.

[DonTom]

First time was around 10, checked it twice now and still okay.
Isn't there a way to check the module? I'm wondering about the noise, it doesn't stop till the abs light goes on.
Also the rear brake is braking like the ABS is doing it's job. Till the light goes on, then it brakes okay.
I'll keep on checking the rear sensor. See if there's a change.

10 ohms or 10K-ohms? But either way, it sounds like something was wrong there. However, I would not expect a lower reading, so I wonder if a mistake was somehow made when you measured. When my front front sensor opened, there was no noise at all. The only difference I noticed was the ABS light being on. Braking seemed to be the same as always, other than I assume I had no ABS, but still no obvious symptoms. And my front wheel  sensor reading was infinite.

The ABS module making noises seems weird to me. Perhaps an oscillation? Poor connection somewhere?

Good luck with that one.

-Don-  Auburn, CA