2003 3BMXV03.0UL2
WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2002 BMW Z8, 2002 BMW Z3, 2002 BMW X5, 2002 BMW M5, and 2002 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
- General Description - Fuel system monitoring looks for permanent deviations of A/F controller (lean and rich) from mean position.
- Monitoring Structure - If fuel system is suddenly and significantly disturbed (leaky injection valve) and A/F controller reaches its restriction or a permanent deviation from mean position reaches additional lean or rich thresholds and accumulated time (sum of all excesses for rich and lean) is greater than a fixed limit during a defined period, a fault for long term trim will be detected and stored. See Figure.