Screen says 090 -why?

[Eville Rich]

This afternoon when I turned on the S10's power (pre-ignition), my instrument screen displayed "090." The screen is the right side one with the gear indicator. This is for a 2016 non-ES S10.

I looked up the code and it appears that it might be related to the brake lights. But I checked my brake light function and they are working. I'm NOT getting a CEL.

This has happened once or twice in the past, but today for the first time, it was there at the start of my ride and the when I shut things down, before turning it off.

Does anyone know the significance of the screen saying "090?"

Thanks much
Eville Rich
2016 S10
2015 WR250R

 

[EricV]

90 is brake light switch issues. If your cruise control works normally, nothing is wrong with your brake switches.

09 is low voltage to the fuel system. If your battery is not holding a charge well, this could explain the 090 code.

Check your CC and see if it takes a set normally and holds speed. If so, check the battery connections to ensure your cables are tight to the battery bolts, then see what the battery voltage is. It should be higher than 12v. Then fire the bike up and test it again while the bike is running. Mine is 14.4 running, for comparison.

I suspect your voltage while running is fine, but with the bike off is perhaps a little low. Original battery, if not kept on a tender, could be getting a little tired or sulphated. If you know someone with an Optimate III battery charger, it has a desulphation routine that may help the battery out. If not, and you see low voltage with the bike off, consider taking it in to a auto parts store and asking them to charge and test your battery under load. This is usually a free service. They can't test it w/o it being fully charged, so just for normal GP they charge it for 24 hours first, then do the load test. This will give you some idea if you have a bad or failing cell or cells in the battery.

Hope that helps.

 

[Eville Rich]

Thanks for the guidance. Cruise control has been working, so I don't think that's the issue. Last year I did have a derp moment and left the bike on, draining the battery. I'll take a look at the voltages. I commute most days with the S10, so don't typically keep it on a tender unless I know it's going to be a few days between riding.

Anyway, the battery is a logical place to investigate. Thanks for the tip.

Eville Rich

 

[Eville Rich]

So I checked my battery voltage this morning. It had been sitting for about 12 hours with no charging. Battery voltage was 12.9V (ignition off, not running), posts were tight. I had the "090" reading when I'd ended my ride yesterday evening and it was not present when I fired it up this morning.

I'll check the cruise function next time I see the code pop up.

Eville Rich

 

[Checkswrecks]

Don't know if you have a LED bulb in for the brakes, but the one I tried triggered the brake code

 

[Eville Rich]

All stock lighting. I'll take a look at the brake light wiring and see if anything looks like it could be creating an intermittent short. When I initially checked for brake light function while the code was present, I only confirmed the rear brake function. I need to take a look at the front brake light switch function. An oversight on my part.

Eville Rich
2016 S10
2015 WR250R

 

[Sierra1]

Tail/brake light is OE LED. I'm now guessing Gen 1s were not. Wonder if Gen 3 will be total LED.

 

[Checkswrecks]

Tail/brake light is OE LED. I'm now guessing Gen 1s were not. Wonder if Gen 3 will be total LED.

Good point. I do love to try different toys and the aftermarket LED that didn't work was a flashing brake bulb. I put the OEM bulb back in and it was fine, so maybe it was the flashing function that the computer didn't like.

 

[Eville Rich]

New development. For the first time I got a flashing cruis control light. First leg of the ride, CC worked just fine. Stopped for a few hours. Return trip, I tried to engage the CC and it flashed. Wouldn't engage. When I got home and shut down the engine, I got the 090 code. Brake lights - front and rear worked just fine. I'm going to check my battery voltage when it's running, bUT my guess is that it's a brake switch issue.

Is it logical that the switch would trigger CC to not work, but also not light up the brakes unless I really pressed either lever?

Eville Rich
2016 S10
2015 WR250R - under the knife

 

[Checkswrecks]

Is it logical that the switch would trigger CC to not work, but also not light up the brakes I bless I really pressed either lever?

An intermittent could do it.

 

[Don in Lodi]

My understanding is that there are two circuits in the rear brake switch for the cruise bikes. The lights can work but not the cruise. Did you happen to try adjusting the brake lever in the recent past?

 

[gv550]

Eville Rich, I have the same 2016 non-ES bike and have the same cruise control problem. Cruise light flashes, CC won't engage, code 90 stored. See my thread, Flashing cruise light.
Have you found a solution?

 

[EricV]

Eville Rich, I have the same 2016 non-ES bike and have the same cruise control problem. Cruise light flashes, CC won't engage, code 90 stored. See my thread, Flashing cruise light.
Have you found a solution?

90 is brake switches. Did you check the brake lights to see if they are staying on? The rear switch is most common, usually after the pedal is adjusted.

 

[gv550]

90 is brake switches. Did you check the brake lights to see if they are staying on? The rear switch is most common, usually after the pedal is adjusted.

Thanks, yes..... brake light is functioning as it should. I've cleaned and set the rear switch to activate near the bottom of brake pedal travel (so I'm not bumping it accidentally)