MSR is a function that is shared between the brake system and the
engine management systems. Is task is to prevent the driving wheels
from locking up during engine braking. This could occur when the foot
is quickly removed from the accelerator or when suddenly changing down
gears. MSR prevents loss of steering control, due to slippage of the
driving wheels, by increasing engine rpm, thus ensuring that the
driving wheels do not spin and steering control is maintained. This
sort of slipping is quite frequent when descending roads that are icy
or snow-covered.