Fail-safe Function
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
To prevent improper operation, the MICUs have a fail-safe function In the fail-safe mode, the output signal is fixed when any part of the system malfunctions (for example, a faulty control unit or communication line) Each control unit has a hardware fail-safe function that fixes the output signal when there is a CPU malfunction, and a software fail-safe function that ignores the signal from a malfunctioning control unit, which allows the system to operate normally