Geely EC718 2009 Workshop Manual page 141

Engine
Ignition Switch
Data Stream Name
Average Injector
Pulse Width
Cylinder No.1 Spark
Advance Angle
Knock Sensor Signal
1
Knock Sensor Signal
2
Cylinder No.1 Ignition
Delay
Cylinder No.2 Ignition
Delay
Cylinder No.3 Ignition
Delay
Cylinder No.4 Ignition
Delay
Group 1 Oxygen
Sensor Integral Value
(Short-Term
Correction)
Idle Speed
"ON"
0.0 ms 3.2 ms
0° 6°
0 V 0 V
0 V 0 V
0.0° 0.0°
0.0° 0.0°
0.0° 0.0°
0.0° 0.0°
1.00 0.99
Control System JL4G18-D
2,500 rpm
When
Scan tool shows 0-16ms. It indicates that in each
engine cycle, the number of the engine control
module command connected to each injector.
The greater the fuel injector pulse width, the more
the fuel is injected. Injector pulse width (PWM)
2.4 ms increases as the engine load increases. If the
engine receives increasing torque signal, it will
increase the injection time. Many factors affect
the fuel injection time, such as engine coolant
temperature sensor, intake air temperature
sensor, power supply voltage and fuel pressure.
At normal idle speed, the current ignition system
33.5° advance angle is 7° ahead of TDC. This value is
for repair reference only.
ECM detects knock sensors amplitude and
0 V
frequency to control the ignition timing. Ignition
timing is placed in the position close to knocking
0 V
to get the maximum torque.
0.0°
0.0°
ECM calculates according to knock sensor
signals. If the knocking is detected, ECM controls
the ignition advance angle delay.
0.0°
0.0°
Based on feedback from oxygen sensor, increase
or decrease the basic injection duration with a
temporary value. It is useful only in the closed-
loop control. When it is a positive value, ECM will
increase the amount of fuel injected by increasing
the injection duration. When it is a negative value,
1.02
ECM will decrease the injection duration. When
the short-term value is continuously lower or
higher than the theoretical value, ECM will add
this value to the long-term fuel value or deduct it
from the long-term fuel value, in order to achieve
optimum Air-Fuel ratio control.
EC718/EC718RV EC715/EC715RV 10/2009
Diagnosis Description
2-59