From the Africa Twin service manual. Not sure if its applicable or not. I had the same thing on my AT and learned a bit about it:
ANTI-LOCK BRAKE SYSTEM (ABS) (CRF1000A/D)
DTC INDEX
• The ABS indicator might blink in the following cases. Correct the faulty part.
– Incorrect tire pressure.
– Tires not recommended for the motorcycle were installed (incorrect tire size).
– Deformation of the wheel or tire.
• The ABS indicator might blink while riding under the following conditions.
This is temporary failure. Be sure to erase the DTC (page 20-6).
Then, test-ride the motorcycle above 10 km/h (6 mph) and check the DTC (page 20-6). Ask the rider for the riding conditions in detail when the motorcycle is brought in for inspection.
Ask the rider for the riding conditions in detail when the motorcycle is brought in for inspection.
– The motorcycle has continuously run bumpy roads.
– The front wheel leaves the ground for a long time when riding (wheelie).
– Only either the front or rear wheel rotates.
– The ABS operates continuously.
– The ABS control unit has been disrupted by an extremely powerful radio wave (electromagnetic interference).
Mine started flashing (disabled ABS) during a long, fast gravel road ride once. Haven't seen it happen again.