[nikolanik]

After I put corrected dash in the car mileage stay the same.

1. take out bsi and done only him, mileage changes but after turn off ignition old mileage roll back
2. then I take out bsi and dash, and checked bsi ans there was new mileage, so I didn't program it again
3 program dash with NEC ( on dash is 294799 and nyo read 294700, I try to correct it to 174799 and nyo correct it to 174700 and then write it to dash
4 put it in the car and dash shows old mileage.

does someone know what is the problem.

maybe I need to put in dash 00km? and what is confused me is that bsi after first attempt didn't get old mileage.