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2221-01
Engine ECU
Engine compartment
InjectorPurge control solenoid
valveFuel rail
Secondary fuel sender
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2221-01
4. INPUT/OUTPUT DEVICES
The engine ECU calculates the accelerator pedal based on the input signals from various sensors, and
controls the overall operation of the vehicle.
The ECU receives the signals from various sensor through data line, and performs effective airfuel ratio
control based on these signals.
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PCV valve
2. COMPONENTS
Engine ECUWCCEngine CHECK lamp
Blow-by hoseExhaust manifold
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1443-01
1. OVERVIEW
The ignition system is to supply high voltage generated from the ignition coil to the spark plug. The
G20DF engine is equipped with the independent type direct ignition system that the ignition coil is
installed in each cylinder.
The basic ignition timing in each cylinder is determined by the signals from camshaft position sensor and
crankshaft position sensor.
This ignition system controls the electronic ignition timing received from the engine ECU. To control the
ignition timing precisely, the ECU use the information below:
Engine load
Coolant temperature
Intake air temperature
Engine rpm
Camshaft position sensor (CPS)
Crankshaft position sensor (CKS) -
-
-
-
-
-
If the signal from the camshaft position sensor is not delivered to the engine ECU, the ignition coil and
fuel system cannot be operated.
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1443-01
Electric throttle valveT-MAP sensorAccelerator pedal position
sensor
Coolant temperature
sensor
Engine ECU
Crankshaft position
sensor
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2112-01
Coolant temperature
sensor
Measures the coolant
temperature and sends the result
to the engine ECU.
Radiator
Radiates the heat through fins and cools
down the hot coolant as the coolant
passes through the tube of the radiator
core.PWM fan
Circulates the fresh air forcibly to exchange
heat with the radiator core fin.
Coolant outlet port
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8530-00
2. CONFIGURATION
1) Circuit Diagram
The engine ECU detects the operating conditions of cruise control system, and monitors the braking
performance, vehicle speed, road conditions and ESP system operation. If the engine ECU determines
that there are not any problem to drive in cruise control mode, the vehicle can be operated by cruise
switch signals (decelerating, accelerating, cruising).
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0000-00
Purge control
solenoid valve
G20DF engine
ECUCoolant Temp
sensorCamshaft position
sensor
Crankshaft position
sensor
T-MAP sensorVIS solenoid valveElectronic throttle
bodyMagnetic trigger
ring
Front oxygen
sensor