From American Honda's Position Statement:

It is the position of American Honda that all vehicles* involved in a collision† must have the following minimum diagnostic scans, inspections, and/or calibrations done to avoid improper repair:

• A preliminary diagnostic scan during the repair estimation phase to determine what diagnostic trouble codes (DTCs) may be present, so proper repairs may be included. (See “Background on Scan Requirements” below for more information.)
• A post-repair diagnostic scan to confirm that no DTCs remain. Any repair that requires disconnection of electrical components in order to perform the repair will require a post-repair diagnostic scan to confirm if the component is reconnected properly and functioning. Damage that requires the replacement of body parts will always require a post-repair diagnostic scan.
• Some safety and driver assistive systems will require inspections, calibration, and/or aiming after collision or other body repairs.

*Refers to any model year Honda or Acura vehicle that is equipped with a diagnostic port from which DTCs can be retrieved with a physically connected tool. This includes: all 1996 to current model year vehicles, certain 1994 to 1995 model year vehicles that contain a 16 pin OBD2 connector, and certain 1992–1995 model year vehicles that contain a 3 pin diagnostic connector.