Engine Control Module: Description and Operation

Deceleration Control System:

The deceleration control system cuts fuel delivery under certain conditions. The components of the deceleration system that are computerized engine control system related are the engine control unit (ECU), throttle sensor, crank angle sensor, water thermosensor, and neutral/clutch switch (MTX only).
The ECU receives inputs from the sensors and cuts the fuel injection signal to the injectors. The throttle sensor detects the primary throttle valve opening angle and sends a signal to the ECU. The crank angle sensor detects eccentric shaft angle at 30° intervals and front rotor position, then sends a signal to the ECU. The water thermosensor detects the engine coolant temperature and sends a signal to the ECU. The neutral and clutch switches detect when the vehicle is in gear and the clutch is engaged. These switches send signals to the ECU.