Ion Current Satellite Monitoring Algorithm
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2010 BMW M6, 2010 BMW M5, 2009 BMW M6, 2009 BMW M5, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.
The amplification of each ion current satellite is controlled by the ECU via driver stages for gain and voltage. Those driver stages are monitored separately. Furthermore, the multiplexed ion current signal from each satellite is monitored for the entire bank. Additionally, two different internal satellite errors can be detected.
For both driver stages the same diagnosis is applied, which enables to detect short circuit to ground, short circuit to battery and open load.