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EC-1216
[YD (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM
System Chart EBS011WZ
*1: The input signal is sent to the ECM through CAN communication line.
*2: The output signal is sent from the ECM through CAN communication line.
Fuel Injection Control System EBS011X0
SYSTEM DESCRIPTION
Three types of fuel injection control are provided to accommodate engine operating conditions; normal control,
idle control and start control. The ECM determines the appropriate fuel injection control. Under each control,
the amount of fuel injected is adjusted to improve engine performance.
Pulse signals are sent to fuel injectors according to the input signals to adjust the amount of fuel injected to
preset value.
START CONTROL
Input/Output Signal Chart
When the ECM receives a start signal from the ignition switch, the
ECM adapts the fuel injection system for the start control. The
amount of fuel injected at engine starting is a preset program value
in the ECM. The program is determined by the engine speed, engine
coolant temperature and fuel rail pressure.
For better startability under cool engine conditions, the lower the
coolant temperature becomes, the greater the amount of fuel
injected. The ECM ends the start control when the engine speed
reaches the specific value, and shifts the control to the normal or idle
control.
Input (Sensor) ECM Function Output (Actuator)
● Accelerator pedal position sensor
● Fuel rail pressure sensor
● Fuel pump temperature sensor
● Engine coolant temperature sensor
● Mass air flow sensor
● Intake air temperature sensor
● Crankshaft position sensor
● Camshaft position sensor
● Turbocharger boost sensor
● Vehicle speed sensor*
1
● ESP/TCS/ABS control unit*
1
● Ignition switch
● Stop lamp switch
● Air conditioner switch*
1
● Park/neutral position switch
● Battery voltage
● Fuel level switch
● Power steering pressure switch
Fuel injection control Fuel injector and Fuel pump
Fuel injection timing control Fuel injector and Fuel pump
Fuel cut control Fuel injector and Fuel pump
Glow control system
Glow relay and glow indicator lamp*
2
On board diagnostic system
Malfunction indicator (MI)*
2
EGR volume control EGR volume control valve
Cooling fan control Cooling fan relay
Turbocharger boost control
Turbocharger boost control solenoid
valve
Fuel transport pump control Fuel transport pump relay
Air conditioning cut control Air conditioner relay
Sensor Input Signal to ECM ECM Function Actuator
Engine coolant temperature sensor Engine coolant temperature
Fuel injection
control (start
control)
Fuel injector
Fuel pump
Crankshaft position sensor Engine speed
Camshaft position sensor Piston position
Ignition switch Start signal
Fuel rail pressure sensor Fuel rail pressure
SEF648S
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