Control System

* SFI system

The SFI system monitors the engine condition through signals which are received from various sensors by engine control module. The best fuel injection volume is determined based on this data and the program stored in the engine control module, and then control signals are output from TERMINALS #10, #20, #30, #40, #50 and #60 of the engine control module to operate the injectors (Inject the fuel). The SFI system controls the fuel injection operation via the engine control module in response to the driving conditions.

* ESA system

The ESA system monitors the engine condition through the signals, which are received by the engine control module from the various sensors. The best ignition timing is determined according to this data and the data stored in the engine control module, and control signals are output from TERMINALS IGT1, IGT2, IGT3, IGT4, IGT5 and IGT6. These signals control the igniters to provide the best ignition timing for the driving conditions.

* Heated oxygen sensor heater control system

The heated oxygen sensor heater control system turns the heater on when the intake air volume is low (Exhaust emissions temperature is low), and warms up the heated oxygen sensor to improve the detection performance of the sensor.

The engine control module evaluates the signals from the various sensors and current is output from TERMINALS HT1B and HT2B, controlling the heater.

* Air fuel ratio sensor heater control system

The air fuel ratio sensor heater control system turns the heater on when the intake air volume is low (Exhaust emissions temperature is low), and warms up the air fuel ratio sensor to improve detection performance of the sensor.

The engine control module evaluates the signals from the various sensors and current is output from TERMINALS HA1A and HA2A, controlling the heater.

* ACIS

The ACIS includes a valve in the bulkhead separating the surge tank into two parts. This valve is opened and closed in accordance with the driving conditions to control the intake manifold length in two stages for increased engine output in all ranges from low to high speeds.

* ETCS-i

The ETCS-i optimizes the engine output according to the opening of the throttle valve under all driving conditions.

* VVT-i

The VVT-i optimizes the intake camshaft valve timing in to match the engine conditions.