i want to know is the ABS kick in while i'm backing up ???
coz today i was backing up at road with sand on it. i was going a bout 20- 30 mph( no one there that's why i go that fast) for abot 400- 500 ft then i just slam on brake(just for fun). and my front wheel lock-up i didn't feel my ABS kick-in. then i try tonight my ABS again as it was raining and my ABS was kick-in while i'm going forward.

 

hum......... good question.............. I have no idea but would assume that the ABS works at all time....

maybe you can put your car into N and see if the ABS engages or not...