Geely EC718 2009 Workshop Manual page 693

Engine
Symptoms
Backfire, Pinging
Fault Definition: Unburned gases enter
the intake manifold or the exhaust
system, ignited, producing a very loud
cracking sound.
Surge
Fault Definition: When the throttle
opening is stable, the engine power
changes. The vehicle speed changes
while the acceleration pedal position
does not change.
Suspected Faulty Items
6. Ignition System: Ignition Wires, Spark Plug,
Ignition Coil
7. ECM Power Supply Circuit
8. Engine Coolant Temperature Sensor
9. Electronic Throttle Body
10. Acceleration Pedal Position Sensor
1. ECM Power Supply Circuit
2. Fuel Pressure Abnormal
3. Fuel Contamination
4. Injector Working Abnormal
5. Air Leakage In Intake System and Crankcase Refer
6. Crankcase Ventilation Valve
7. Knock Sensor (KS) System Ignition Delay Too
Great
8. Spark Plug: Thermal value is incorrect, damp,
crack, gap is incorrect, excessive erosion,
excessive carbon residue, contaminated by fuel
9. Spark Plug Wire Damage
10. Ignition Coil Damage
11. Coolant Level Too Low, Thermostat
Malfunction
1. ECM Power Supply Circuit
2. Air-Conditioning Compressor
3. Heated Oxygen Sensor Abnormal
4. Poor Fuel Quality, Fuel Contamination
5. Fuel Pressure Abnormal
6. Injector Working Abnormal
7. Mixture Too Rich
8. Mixture Too Lean
Control System JL4G15-D
Relevant Sections
Refer to2.20 Ignition System JL4G15-
Din2.20.4 Diagnostic Information and
Procedures
Refer to 2.12.7.43 DTC P0562 P0563
Refer to 2.12.7.20 DTC P0117 P0118
Refer to 2.12.7.54 DTC P2135
Refer to 2.12.7.55 DTC P2138
Refer to 2.12.7.43 DTC P0562 P0563
Refer to2.13 Fuel System JL4G15-
Din2.13.1 Diagnostic Information and
Procedures
to2.14 Auxiliary Emission Control
JL4G15-Din2.14.2
Information and Procedures
Refer to 2.12.7.34 DTC P0324 P0325
Refer to2.20 Ignition System JL4G15-
Din2.20.4 Diagnostic Information and
Procedures
2.18 Engine Cooling System JL4G15-
Din2.18.3 Diagnostic Information and
Procedures
Refer to 2.12.7.43 DTC P0562 P0563
Refer to8.2
conditioningin8.2.7
Information and Procedures
Refer to 2.12.7.22 DTC P0131 P0132
P0133 P0134
Refer to2.13 Fuel System JL4G15-
Din2.13.1 Diagnostic Information and
Procedures
Refer to 2.12.7.26 DTC P0171 P0172
P1167 P1171 P2187 P2188
EC718/EC718RV EC715/EC715RV 10/2009
2-611
Diagnostic
Automatic Air-
Diagnostic