Ducati DIAVEL Owner's Manual page 177

ABS device
Check that the front (1) and rear (2) phonic wheels are
clean.
Warning
Clogged reading slots would compromise
system proper operation. It is recommended to
disable ABS system in case of muddy road surface
because under this condition the system might be
subject to sudden failure.
Warning
Prolonged rearing could deactivate the ABS
system.
176
1
Fig. 126
2
Fig. 127