Common OBD-II Terms: Diagnostic
WARNING: This page is about a different car, the 2002 Isuzu Trooper. However, it is still accessible from the selected car via links, so may be relevant.
When used as a noun, the word diagnostic refers to any on-board test run by the vehicle's Diagnostic Management System. A diagnostic is simply a test run on a system or component to determine if the system or component is operating according to specification. There are many diagnostics as shown in following list:
- Misfire.
- Oxygen sensors.
- Oxygen sensor heaters.
- EGR.
- Catalyst monitoring.