Audio, Telephone, RTI (1999-2000): Glossary: D
| Digital signal | Signal which has only a limited number of levels, usually two. |
| DIM | Driver Information Module. Module which controls the combined instrument panel display. |
| Diversity | The diversity function reduces the risk of multi wave interference (Multipath). |
| Dolby B | Noise reduction function registered by Dolby Laboratories. |
| Dolby Pro Logic | System for dividing stereo channels registered by Dolby Laboratories. |
| DTC | Diagnostic Trouble Codes registered by the on-board diagnostic (OBD) unit. |