Ill. Admin. Code tit. 35, § 276.103
Abbreviations used in this Part include the following:
| cc/min | cubic centimeters per minute |
| CO | carbon monoxide |
| CO2 | carbon dioxide |
| DTC | diagnostic trouble code |
| HC | hydrocarbons, as hexane |
| I/M | inspection and maintenance |
| MIL | malfunction indicator light |
| NIST | National Institute for Standards and Technology |
| NO | nitrogen oxide |
| NOx | oxides of nitrogen |
| OBD | on-board diagnostics |
| ppm | parts per million by volume |
| RPM | revolutions per minute |
| SDM | source detector module |
| TBD | test-by date |
| TED | test eligibility date |
| VIN | vehicle identification number |
(Source: Amended at 35 Ill. Reg. 11268, effective June 28, 2011)