04 R1150RT Low voltage

[Bill Lumberg]

Started a few weeks ago. Get a flashing warning lamp and servo fade during hard braking with throttle closed. Sniffed around with a voltimeter, and replaced the battery. No issues riding, but if I let revs fall below 2K, especially if applying the servo-assisted braking, I'll get a brief flashing warning lamp, and sometimes a servo fade. If I sit at idle long enough, I'll get the symptoms regardless of whether the brakes are applied. Been riding this way weeks now. No problems with brakes, no problems with starting. Any idea what to check next?

[dirtrider]

Afternoon Bill

 

Difficult to tell what you have without more information.

 

Could be low system voltage, or resistance in the servo power supply source, or one of the servo motors drawing too much current, or even a grounding issue, or ?????

 

My first suggestion is to hook your voltmeter up to the battery (or a battery circuit) then ride with it hooked up. See if your system voltage is staying up when your servo fade is happening.

 

Maybe visually look at the I-ABS controller connector for signs of overheating or oxidation/resistance issues.

 

Can you tell if your ABS servo(s) are shutting down when the brake pedal & lever is released?

 

Otherwise you might have to get GS-911 or dealer computer on the brake system to se what codes are stored.

 

[Tobias]

Is this the same Bill Lumberg from "Office Space"?

 

You wrote "If I sit at idle long enough, I'll get the symptoms regardless of whether the brakes are applied" That makes me wonder what your alternator is putting out.

 

If you put a volt meter across your battery terminals what do you get when:

Ignition off

Idle at 1150 RPM

Neutral at 2000 RPM

Also, did the problem briefly go away when you installed the new battery?