AFI Engine Control Unit ECU For Nissan Skyline R31 12N03M
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An engine control unit (ECU), also commonly called an engine control module (ECM), is a type of electronic control unit that controls a series of actuators on an internal combustion engine to ensure optimal engine performance.
It is a a small device in a vehicles body that is responsible for controlling a specific function.
Todays vehicles may contain 100 ECUs or more, controlling functions that range from the essential (such as engine and power steering control) to comfort (such as power windows, seats and HVAC), to security and access (such as door locks and keyless entry). ECUs also control passive safety features, such as airbags, and even basic active safety features, such as automatic emergency braking.
Each ECU typically contains a dedicated chip that runs its own software or firmware, and requires power and data connections to operate.