Name
|
Function
|
ECU
|
Engine-ECU
|
Effects control to actuate the actuators in accordance with the driving conditions,
based the signals input by the sensors.
|
Sensors
|
Ignition switch-IG
|
Detects the ignition switch-IG ON/OFF signals. The engine-ECU turns
the engine control relay ON/OFF in accordance with these signals.
|
Ignition switch-ST
|
Detects that the engine is cranking. Based on this signal, the engine-ECU
effects fuel injection and ignition timing control that are suited for starting the engine.
|
Air flow sensor
|
Contains a heat-sensing resistor to detect the intake air flow rate (mass).
Based on the signals from this sensor, the engine-ECU controls the fuel injection volume.
|
Barometric pressure sensor
|
This sensor detects the altitude of the vehicle. It enables the engine-ECU
to make fuel injection volume corrections in order to achieve an appropriate air-fuel ratio.
|
Oxygen sensors (front and rear)
|
Consisting of zirconia and platinum electrodes, these sensors detect the
oxygen concentration in the exhaust gases. The engine-ECU effects air-fuel ratio feedback control
based on the oxygen sensor (front) output signals. In addition, it uses the signals output by
the oxygen sensor (rear) to correct the deviations in the output signals of the oxygen sensor
(front).
|
Intake air temperature sensor
|
Contains a thermistor to detect the intake air temperature. Based
on the voltage that is output by this sensor, the engine-ECU corrects the fuel injection volume
to suit the intake air temperature.
|
Engine coolant temperature sensor
|
Contains a thermistor to detect the engine coolant temperature. The engine-ECU
determines the warm-up condition of the engine based on the signals output by this sensor, and
controls the fuel injection volume, idle speed, and ignition timing.
|
Throttle position sensors (main and sub)
|
Detect the position of the throttle valve and input it into the engine-ECU.
Based on the voltage output by these sensors, the engine-ECU effects feedback control for the
throttle valve position.
|
Accelerator pedal position sensors (main and sub)
|
Detect the position of the accelerator pedal and input it into the engine-ECU.
Based on the voltage output by these sensors, the engine-ECU injects fuel in accordance with
the accelerator pedal position and effects throttle valve position control.
|
Camshaft position sensor
|
Contains a magnetic resistance element to detect the position of
the camshaft. The engine-ECU detects the compression top-dead-centre (TDC) of each cylinder
based on the combination of the signals from this sensor and the crank angle sensor.
|
Crank angle sensor
|
Contains a magnetic resistance element to detect the crank angle. Based
on this signal, the engine-ECU controls the injectors.
|
Detonation sensor
|
Contains a piezoelectric element to detect the vibration of the cylinder block
during knocking. In accordance with the signals provided by this sensor, the engine-ECU retards
the ignition timing in accordance with the extent of the knocking.
|
Alternator FR terminal
|
Detects the energizing duty cycle ratio at the alternator field coil.
|
Alternator L terminal
|
Detects the alternator excitation current, outputting the voltage
signal to the engine-ECU. The engine-ECU sends the request signal to illuminate the charge lamp
to the combination meter via the CAN.
|
Clutch switch
|
Contains a contact type switch to detect the pressing of the clutch pedal.
|
Actuators
|
Engine control relay
|
In accordance with the signals provided by the engine-ECU, this relay controls
the power supply for the engine-ECU, crank angle sensor, camshaft position sensor, and injectors.
|
Throttle valve control servo relay
|
Turns the power supply circuit in the engine-ECU for actuating the throttle
valve control servo ON/OFF.
|
Starter relay
|
Controls the power supply for the starter S terminal circuit.
|
Injectors
|
Inject fuel in accordance with the actuation signals provided by
the engine-ECU.
|
Ignition coil (integrated in power transistor)
|
Interrupts the primary current of the ignition coil in accordance
with the ignition signal provided by the engine-ECU, in order to generate high voltage for ignition.
|
Fuel pump relay
|
Controls the actuation of the fuel pump.
|
Throttle valve control servo
|
Controls the position of the throttle valve in accordance with the signals
provided by the engine-ECU.
|
Oil control valve
|
The signals from the engine-ECU actuate the oil control valve, which controls
the valve timing.
|
Oxygen sensor heater
|
Accelerates the activation of the oxygen sensor.
|
Waste gate solenoid valve
|
Controls the boost pressure that affects the waste gate actuator
in response to the signals from the engine-ECU.
|
Fuel pressure control solenoid valve
|
Controls the fuel pressure in response to the signals from the engine-ECU.
|
Purge control solenoid valve
|
In accordance with the signals provided by the engine-ECU, this valve
controls the volume of the purge air that enters the surge tank.
|
Alternator G terminal
|
In accordance with the signals provided by the engine-ECU, this terminal
controls the amount of current generated by the alternator.
|
A/C compressor relay
|
Controls the actuation of the A/C compressor in accordance with the signals
provided by the engine-ECU.
|
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