RX7 2RTR- 1308cc 1.3L Turbo FI (1989)
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.
