| A cast iron | |
| A signal that varies the ratio of on-time to off-time, resulting in a square wave that can range between zero and 100; in a process, the ratio of on-time to total cycle time; in fuel injectors, the percentage on-time to total cycle time; in solenoids, the percentage of on-time to total cycle time. | |
| A climate control system that uses the heating and air-conditioning system to maintain that interior temperature selected by the vehicles passengers. | |
| A code that represents and can be used to identify a malfunction in the computer control system. |