CEC System: Description

The Mazda RX7 computerized engine control system monitors various engine/vehicle functions to control engine operation and lower emissions while maintaining good fuel economy and driveability.

The Electronic Control Unit (ECU), through various input sensors, monitors battery voltage, engine RPM, amount of intake air, crank angle, intake temperature, radiator and engine coolant temperatures, oxygen concentration in exhaust gases, engine knock (Turbo), throttle opening, atmospheric pressure, gearshift lever position, clutch engagement, braking, power steering and A/C compressor operation.