Troubleshooting LifeFitness Treadmills LifeFitness 95Ti and 97Ti Treadmills Smart Stop Unplugged Error Applies to: LifeFitness 97T, 97Ti, 97Te LifeFitness 95T, 95Ti, 95Te Probable Cause Broken, damaged, or unplugged wire harness. Corrective Action Reset or replace smart stop wire harness. By Paul Anderson · Last updated: October 5, 2021