Name
|
Function
|
ECU
|
Engine-ECU or engine-A-M/T-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 or engine-A-M/T-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
or engine-A-M/T-ECU effects fuel injection and ignition timing control that are suited for starting
the engine.
|
Manifold absolute pressure sensor
|
Contains a piezoelectric resistor semiconductor pressure sensor to detect
the pressure in the intake manifold. The engine-ECU or engine-A-M/T-ECU uses the voltage that
is output by this sensor to calculate the ignition timing. Furthermore, it estimates the atmospheric
pressure when the ignition switch is ON (with the engine stopped) and the throttle is fully
open.
|
Oxygen sensors (front and rear)
|
Consisting of zirconia and platinum electrodes, these sensors detect the
oxygen concentration in the exhaust gases. The engine-ECU or engine-A-M/T-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 or engine-A-M/T-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
or engine-A-M/T-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
or engine-A-M/T-ECU. Based on the voltage output by these sensors, the engine-ECU or engine-A-M/T-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
or engine-A-M/T-ECU. Based on the voltage output by these sensors, the engine-ECU or engine-A-M/T-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 or engine-A-M/T-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 or engine-A-M/T-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 or engine-A-M/T-ECU
retards the ignition timing in accordance with the extent of the knocking.
|
Neutral position sensor <Vehicles with AS&G system>
|
By moving the permanent magnet on the linear primary coil, the neutral
position is detected for the sensor to output the signal into the engine-ECU. The engine-ECU
controls the AS&G system, based on this signal.
|
Battery current sensor <Vehicles with AS&G system>
|
Using the hall element, the battery current is detected and converted into
the voltage signal to output the signal to the engine-ECU. The engine-ECU carries out the power
generation control of the alternator and controls the AS&G system, based on this signal.
|
Battery temperature sensor <Vehicles with AS&G system>
|
Using the thermistor, the battery temperature is detected and converted
into the voltage signal to output the signal to the engine-ECU. The engine-ECU compensates the
power generation control of the alternator and controls the AS&G system, based on this
signal.
|
Brake vacuum sensor <Vehicles with AS&G system>
|
The brake booster vacuum pressure is converted into the voltage signal
to output the signal to the engine-ECU. The engine-ECU controls the AS&G system, based
on this signal.
|
Auto Stop & Go (AS&G) OFF switch <Vehicles with
AS&G system>
|
Using the contact point switch, the operation condition of the driver’s AS&G
OFF switch is detected to output the voltage signal into the engine-ECU. The engine-ECU switches
ON/OFF the AS&G system.
|
Clutch switch (A) <Vehicles with AS&G system>
|
It is detected that the clutch pedal is not depressed, using the
contact point switch, to output the voltage signal into the engine-ECU. The engine-ECU controls
the AS&G system, based on this signal.
|
Clutch switch (B) <Vehicles with AS&G system>
|
It is detected that the clutch pedal is fully depressed, using the contact
point switch, to output the voltage signal into the engine-ECU. The engine-ECU controls the
AS&G system, based on this signal.
|
Hood buzzer switch <Vehicles with AS&G system>
|
Using the contact point switch, the hood open/closed conditions are detected
to output the voltage signal into the engine-ECU. The engine-ECU controls the AS&G
system, based on this signal.
|
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 or the engine-A-M/T-ECU. The engine-ECU or the engine-A-M/T-ECU sends
the request signal to illuminate the charge lamp to the combination meter via the CAN.
|
Actuators
|
Engine control relay
|
In accordance with the signals provided by the engine-ECU or engine-A-M/T-ECU,
this relay controls the power supply for the engine-ECU or engine-A-M/T-ECU, crank angle sensor,
camshaft position sensor, and injectors.
|
Throttle valve control servo relay
|
Turns the power supply circuit in the engine-ECU or engine-A-M/T-ECU
for actuating the throttle valve control servo ON/OFF.
|
Starter relay <Vehicles without AS&G system>
|
Controls the power supply for the starter S terminal circuit.
|
Starter cut relay <Vehicles with AS&G system>
|
Based on the signal sent by the engine-ECU, the switch is moved to the
ON/OFF position to control the power supply for the starter control relay.
|
Starter control relay <Vehicles with AS&G system>
|
Based on the signal sent by the engine-ECU, the switch is moved to the
ON/OFF position to control the power supply for the starter.
|
Injectors
|
Inject fuel in accordance with the actuation signals provided by
the engine-ECU or engine-A-M/T-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 or engine-A-M/T-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 or engine-A-M/T-ECU.
|
Oil control valve <135 engine>
|
The signals from the engine-ECU or engine-A-M/T-ECU actuate the oil
control valve, which controls the valve timing.
|
Oxygen sensor heater
|
Accelerates the activation of the oxygen sensor.
|
Purge control solenoid valve
|
In accordance with the signals provided by the engine-ECU or engine-A-M/T-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 or engine-A-M/T-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 or engine-A-M/T-ECU.
|
Capacitor relay <Vehicles with AS&G system>
|
The engine-ECU sends the ON signal to the capacitor unit at the auto start.
This allows the radio with the CD player to prevent the jumpiness phenomenon due to the battery
voltage drop.
|
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