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
2. Air-conditioner Compressor
"Air-Conditioning System" in the
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
8. The Air-Fuel Mixture Too Lean
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
"Engine Mechanical System" in the
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
---
3. Poor Fuel Quality, Fuel Contamination
"Fuel System" in the
.
4. Fuel Pressure Abnormal
5. Injector Working Abnormal
6. The Air-Fuel Mixture Too Rich
7. The Air-Fuel Mixture Too Lean
8. Knock Sensor (KS) System Ignition
Delay Too Great
"Ignition System" in the
.
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
2-42
Control System JL4G18-D
Engine
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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