Emissions Related Diagnostic Functions
WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
The engine control module (ECM) checks that the emissions related functions are working. These systems are checked by an ongoing diagnostic function. The diagnostic function checks that the relevant components and the actual function in the system are working. It is called a trip when all diagnostic functions have been gone through. Trip time may vary depending on driving style, but normally it takes approximately 25 minutes fir mixed driving.