Why did you change out the driver seat belt? Did you install a new or used seat belt? Was the replacement seat belt an exact match for your car? Please provide more detailed history. When you turn on the ign key and/or start the car, the SRS brain does an ohms check on all of the air bags and seat belts. Resistance too high is the connector did not get plugged in or seated properly or it is a used SRS part that was already deployed or a wrong part.