Geely EC718, EC718RV, EC715, EC715RV. Manual part

"Air-Conditioning System" in the

2.6.8.7

Engine

Mount Replacement

Engine stalls only when Air-
Conditioning is working.
Fault Definition: when Air-
Conditioning is working,

1. Air-Conditioning signal circuit

8.2.7

2. Idle Air Control Valve Stagnant

2.2.8.1

Idle Air Control Valve

Replacement

Engine

Control System JL4G18-D

2-39

Symptoms

Suspected Fault Items

Relevant Sections

engine speed is not stable or
engine stall.

3.ECM

2.2.8.8

Engine Control Module

Replacement

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.

1.ECM Power Supply Circuit

2. Fuel Pressure Abnormal

"Fuel System" in the

Diagnostic Information and Procedures

3. Fuel Contamination

4. Injector Working Abnormal

5. Air leakage in intake system and
crankcase

"Auxiliary Emissions Control Devices" in
the

2.4.6

6. Crankcase Ventilation Valve

7. Knock sensor (KS) system ignition
delay too great

"Ignition System" in the

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

"Ignition System" in the

11. Engine coolant level too low,
thermostat failure

"Engine Cooling System" in the

2.8.7

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.

1.ECM Power Supply Circuit

•

Air-Conditioning or Defroster Always
On

•

Tire Pressure Incorrect

•

Vehicle Overload

•

Accelerate too fast, too frequent

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3. Air Cleaner Filter Blocked

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4. Poor Fuel Quality, Fuel Contamination

"Fuel System" in the

5. Fuel Pressure Abnormal

6. Injector Working Abnormal

7. Throttle Body Dirty

Body Assembly Replacement

2.6.8.5

Throttle

8. Rich Gas and Air Mixture

DTC P0130 P0131 P0132 P0133

2.2.7.21

P0134 P2195 P2196

2-40

Control System JL4G18-D

Engine

Symptoms

Suspected Fault Items

Relevant Sections

9. Air Leakage In Intake System and
Crankcase System

"Auxiliary Emissions Control Devices" in
the

2.4.6

Diagnostic Information and Procedures

10. Crankcase Ventilation Valve
Stagnant

11. Knock Sensor (KS) system ignition
delay too great

"Ignition System" in the

12. Spark Plug: Thermal Value Incorrect,
Damp, Crack, Gap Incorrect, Excessive
Erosion, Excessive Carbon Residue,
Contaminated by Fuel

13. Spark Plug Wire Damage

14. Ignition Coil Damage

15. Engine coolant level too low,
thermostat failure

"Engine Cooling System" in the

2.8.7

16. Excessive engine oil in combustion
chamber or valve seals leak

2.6.7

17. Cylinder Compression Pressure
Incorrect

18. Valve stagnant or leak, broken valve
spring, valve timing incorrect

19. Excessive Carbon Residue in
Combustion Chamber

20. Vacuum Hose Cracking or Kink,
Connection Unreliable

21. Exhaust not Smooth: Three-way
Catalytic Converter Plug, Muffler Internal
Damage

"Engine Exhaust System" in the

2.7.5

22. Braking System Dragging or
Operation Abnormal

"Braking System" in the

6.4.4

23. Electromagnetic Interference (EMI)
in the voltage circuit may lead to engine
Misfire. Use the scan tool to monitor the
engine speed to detect electromagnetic
interference. Engine speed parameters
sudden increase while the actual engine
speed is almost no change indicates the
presence of electromagnetic
interference. If there is a fault, check
whether there is a high voltage part in the
vicinity of the ignition control circuit.

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Engine

Control System JL4G18-D

2-41

Symptoms

Suspected Fault Items

Relevant Sections

Surge
Fault Definition: When the
throttle position is stable the
engine power changes. It feels
as if the vehicle speed will rise
and fall when there is no
accelerator pedal position
change.

1. ECM Power Supply Circuit

"Air-Conditioning System" in the

2. Air-conditioner Compressor

8.2.7

3. Heated Oxygen Sensor Abnormal

4. Poor Fuel Quality, Fuel Contamination

"Fuel System" in the

5. Fuel Pressure Abnormal

6. Injector Working Abnormal

7. The Air-Fuel Mixture Too Rich

DTC P0130 P0131 P0132 P0133

2.2.7.21

P0134 P2195 P2196

8. The Air-Fuel Mixture Too Lean

DTC P0130 P0131 P0132 P0133

2.2.7.21

P0134 P2195 P2196

9. Spark Plug: Thermal Value Incorrect,
Damp, Crack, Gap Incorrect, Excessive
Erosion, Excessive Carbon Residue,
Contaminated by Fuel

"Ignition System" in the

10. Spark Plug Wire Damage

11. Ignition Coil Damage

12. Intelligent Variable Valve Timing
System

13. Vacuum Hose Cracking or Kink,
Connection Unreliable

Power Shortage, Accelerate
Pedal Stagnant or Soft to Press
Fault Definition: The engine
power output is lower than
expected. When half-pressing
the accelerator pedal, the
vehicles accelerates a little or
does not accelerate at all.

1. ECM Power Supply Circuit

2. Air Cleaner Filter Blocked

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3. Poor Fuel Quality, Fuel Contamination

"Fuel System" in the