Geely EC718 2009 Workshop Manual page 122

2-40 Control System JL4G18-D
Symptoms
engine speed is not stable or
engine stall.
Back fire, Pinging
Fault Definition: Unburned
gases from the combustion
chamber entering into the
intake manifold or exhaust
system, ignited, producing a
very loud pinging sound.
High Fuel Consumption, Poor
Fuel Economy
Fault Definition: The actual
road test fuel consumption is
significantly higher than
expected. In addition, the fuel
consumption is also
significantly higher than the
previous road test.
EC718/EC718RV EC715/EC715RV 10/2009
Suspected Fault Items
3.ECM
1.ECM Power Supply Circuit
2. Fuel Pressure Abnormal
3. Fuel Contamination
4. Injector Working Abnormal
5. Air leakage in intake system and
crankcase
6. Crankcase Ventilation Valve
7. Knock sensor (KS) system ignition
delay too great
8. Spark Plug: Thermal Value Incorrect,
Damp, Crack, Gap Incorrect, Excessive
Erosion, Excessive Carbon Residue,
Contaminated by Fuel
9. Spark Plug Wire Damage
10. Ignition Coil Damage
11. Engine coolant level too low,
thermostat failure
1.ECM Power Supply Circuit
2.
• Air-Conditioning or Defroster Always
On
• Tire Pressure Incorrect
• Vehicle Overload
• Accelerate too fast, too frequent
3. Air Cleaner Filter Blocked
4. Poor Fuel Quality, Fuel Contamination
5. Fuel Pressure Abnormal
6. Injector Working Abnormal
7. Throttle Body Dirty
8. Rich Gas and Air Mixture
Relevant Sections
This section2.2.8.8 Engine Control Module
Replacement.
This section2.2.7.37 DTC P0560 P0562
"Fuel System" in the2.3.7 Diagnostic Information and
Procedures.
"Auxiliary Emissions Control Devices" in
the2.4.6 Diagnostic Information and
"Ignition System" in the2.10.7 Diagnostic Information
and Procedures.
"Ignition System" in the2.10.7 Diagnostic Information
and Procedures.
"Engine Cooling System" in
Information and Procedures.
This section2.2.7.37 DTC P0560 P0562
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"Fuel System" in the2.3.7 Diagnostic Information and
Procedures.
"Engine Mechanical System" in
Body Assembly Replacement.
This section2.2.7.21 DTC P0130 P0131 P0132 P0133
P0134 P2195 P2196.
Engine
P0563.
Procedures.
the2.8.7 Diagnostic
P0563.
the2.6.8.5 Throttle