Fast Idle - Chery A1 2009 Service Manual

ELECTRONIC ENGINE CONTROLS - ENGINE SYMPTOM DIAGNOSIS

Fast Idle

The following conditions apply to this symptom:
• The engine idles at a higher than recommended speed.
1.
VERIFY ENGINE OPERATES AT NORMAL OPERATING TEMPERATURE
• Check the engine operating temperature.
Does the engine appear to be either overheating or not reaching normal operating temperature?
Yes >>
Repair the engine cooling system.
No >>
Go to the next step.
2.
PRELIMINARY CHECKS
• Carry out the following preliminary checks:
− Vacuum leaks
− Throttle plate and linkage
− Intake air tube (leaks)
− Correct sealing of intake manifold and components attached to intake air tube
Are all checks OK?
Yes >>
Go to the next step.
No >>
Repair as necessary.
Verify the symptom no longer exists.
3.
CHECK ECM DTC
• Turn the ignition switch on.
• With the X-431 scan tool, select view DTC and data stream in ECM.
Are there any DTCs present?
Yes >>
Check for causes. See Diagnostic Trouble Code (DTC) index — Engine Control Module (ECM).
No >>
See Diagnostic Help for additional information.
Chery Automobile Co., Ltd.
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