* Engine Control: This includes fuel injection (amount and timing), ignition timing, air/fuel mixture, idle speed control, and emissions control systems (like the catalytic converter). It uses sensors to monitor these aspects and adjust accordingly.
* Transmission Control (Automatic Transmission): If your Mustang has an automatic transmission, the PCM controls shift points, torque converter lockup, and other transmission functions.
* Emissions Control: The PCM monitors and controls various systems to meet emissions standards.
* Security System: The PCM interacts with the vehicle's security system, preventing unauthorized starting.
* Sensor Inputs: The PCM receives data from numerous sensors throughout the vehicle, such as:
* Mass Air Flow (MAF) sensor
* Throttle Position Sensor (TPS)
* Crankshaft Position Sensor (CKP)
* Cam Position Sensor (CMP)
* Oxygen Sensors (O2)
* Manifold Absolute Pressure (MAP) sensor
* Coolant Temperature Sensor (CTS)
* and many others...
* Actuator Control: The PCM sends signals to various actuators to make adjustments based on sensor inputs. Examples include:
* Fuel Injectors
* Ignition Coils
* Transmission Solenoids
In short, the PCM is responsible for the efficient and safe operation of the engine and transmission, and plays a vital role in vehicle emissions compliance and overall drivability. Problems with the PCM can lead to a wide range of drivability issues, from poor fuel economy to complete engine failure.
