2009 CHERY TIGGO engine

Downloaded from www.Manualslib.com manuals search engine Hard Start / Long Crank / Erratic Start / Erratic Crank
The following conditions apply to this symptom:
•The engine cranks for an extended period of time.
• The engine starts hard during a long cranking time.
1.PRELIMINARY CHECKS
• Confirm that the correct starting procedure was used by the customer before proceeding with diagnosis.
• Carry out the following preliminary checks:
Vacuum leaks
Fuel quality (concerns such as correct octane, contamination, winter/summer blend)
Intake air system (tubes)
Air cleaner (restrictions)
Battery condition and starter current draw.
Are all checks OK?
Ye s>>Go to the next step.
No
>>Repair as necessary.
Verify the symptom no longer exists.
2.CHECK ECM DTC
• With scan tool X-431, select view DTC and data stream in ECM.
Are there any DTCs present?
Ye s>>See the Diagnostic Trouble Code (DTC) List.
Go to the specific diagnostic test to troubleshoot the DTC.
No
>>Go to the next step.
3.CHECK SECONDARY IGNITION SYSTEM
• Perform the following to test the secondary ignition system:
Disconnect the injector fuse.
Remove any of the 4 spark plugs.
Connect the spark plug to spark plug wire.
Ground the spark plug on the cylinder block.
Crank the engine to test the secondary ignition system with the spark plugs removed.
Is a strong blue spark visible at each spark plug while cranking the engine?
Ye s>>Go to the next step.
No
>>Check Camshaft Position (CMP) sensor signal at ECM.
If CMP sensor is OK, check the following:
Crankshaft Position (CKP) sensor malfunction
Faulty spark plug wires
Faulty spark plugs
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03
03–549Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4.CHECK FUEL SYSTEM PRESSURE
• Release the fuel system pressure (See Fuel Pressure Relief Procedure in Section 04 Fuel Delivery).
• Check fuel system pressure (See Fuel Pressure Test in Section 04 Fuel Delivery).
Is fuel pressure correct?
Ye s>>Go to the next step.
No
>>If the fuel pressure is greater than 400 kPa (4.0 bar):
Replace the fuel pressure regulator.
If the fuel pressure is less than 400 kPa (4.0 bar):
Check the fuel supply system for restrictions or leaks.
If no problems, repair or replace fuel filter, pressure regulator or fuel pump assembly.
5.CHECK EXHAUST SYSTEM
• Check the exhaust system for restrictions.
Is there a restriction in the exhaust system?
Ye s>>Repair as necessary.
No
>>Go to the next step.
6.CHECK ENGINE OVERHEATING
• Is the engine overheating (hot start concern only)?
For hot start concerns, does engine appear to be overheating?
Ye s>>Repair the engine cooling system.
No
>>Go to the next step.
7.CHECK POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM
• Remove the PCV valve and shake it.
Does PCV valve rattle?
Ye s>>Go to the next step.
No
>>Replace the PCV valve.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03–550Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 8.CHECK EVAPORATIVE EMISSIONS (EVAP) SYSTEM
• Disconnect the canister control valve (1) hose.
• Place a stiff piece of paper over the hose end and
start the engine.
Does vacuum hold the paper?
Ye s>>Check for a vacuum leak in EVAP system
(refer to EVAP system) and refer to EVAP control cir-
cuit relative DTC.
No
>>Go to the next step.
9.CHECK INTAKE AIR SYSTEM
• Check for MAP/MAF sensor.
Is there any contamination?
Ye s>>Install a new MAF/IAT or MAP/IAT sensor.
No
>>See Diagnostic Help for additional information.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
VISMD030007
03
03–551Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 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?
Ye s>>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?
Ye s>>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 scan tool X-431, select view DTC and data stream in ECM.
Are there any DTCs present?
Ye s>>See the Diagnostic Trouble Code (DTC) List.
Go to the specific diagnostic test to troubleshoot the DTC.
No
>>See Diagnostic Help for additional information.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03–552Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Lack / Loss Of Power
The following conditions apply to this symptom:
•The engine has poor performance.
• The engine has poor acceleration.
1.PRELIMINARY CHECKS
• Verify symptom is reported under normal driving conditions without excessive engine/vehicle load conditions.
• Carry out the following preliminary checks:
Fuel quality
Vacuum lines (check for damage and correct routing)
Intake air system (check for damaged tubes and dirty air filter)
Vehicle wiring (disconnected, corroded/damaged)
Throttle linkage
Radiator (obstructed)
Transaxle
NOTE :
Be aware of the over RPM limiting functions of the ECM.
Are all checks OK?
Ye s>>Go to the next step.
No
>>Repair as necessary.
Verify the symptom no longer exists.
2.CHECK ECM DTC
• Turn ignition switch on.
• With the scan tool X-431, read the DTC.
Do any DTC displayed on the scan tool?
Ye s>>See the Diagnostic Trouble Code (DTC) List.
Go to the specific diagnostic test to troubleshoot the DTC.
No
>>Go to the next step.
3.CHECK FUEL SYSTEM PRESSURE
• Release the fuel system pressure (See Fuel Pressure Relief Procedure in Section 04 Fuel Delivery).
• Check fuel system pressure (See Fuel Pressure Test in Section 04 Fuel Delivery).
Is fuel pressure correct?
Ye s>>Go to the next step.
No
>>If the fuel pressure is greater than 400 kPa (4.0 bar):
Replace the fuel pressure regulator.
If the fuel pressure is less than 400 kPa (4.0 bar):
Check the fuel supply system for restrictions or leaks.
If no problems, repair or replace fuel filter, pressure regulator or fuel pump assembly.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03
03–553Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4.CHECK SECONDARY IGNITION SYSTEM
• Perform the following to test the secondary ignition system:
Disconnect the injector fuse.
Remove any of the 4 spark plugs.
Connect the spark plug to spark plug wire.
Ground the spark plug on the cylinder block.
Crank the engine to test the secondary ignition system with the spark plugs removed.
Is a strong blue spark visible at each spark plug while cranking the engine?
Ye s>>Go to the next step.
No
>>Check Camshaft Position (CMP) sensor signal at ECM.
If CMP sensor is OK, check the following:
Crankshaft Position (CKP) sensor malfunction
Spark plug wires
Spark plugs
5.CHECK INTAKE AIR SYSTEM
• Check for MAP/MAF sensor.
Is there any contamination?
Ye s>>Clean or replace the sensor.
No
>>Go to the next step.
6.CHECK EXHAUST SYSTEM
• Check the exhaust system for restrictions.
Is there a restriction in the exhaust system?
Ye s>>Repair as necessary.
No
>>Go to the next step.
7.CHECK BASE ENGINE CONCERNS
• Check for base engine concerns (such as improper compression, worn camshaft/valve train, gasket leaks).
Is a fault indicated?
Ye s>>Repair as necessary.
No
>>Go to the next step.
8.CHECK AUTOMATIC/MANUAL TRANSAXLE OPERATION
• Check the operation of the transaxle.
Is the transaxle operation normal?
Ye s>>Go to the next step.
No
>>Repair as necessary.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03–554Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 9.CHECK FOR BRAKE SYSTEM CONCERNS
• Check the operation of the brakes.
Is a fault indicated?
Ye s>>Repair as necessary.
No
>>Go to the next step.
10.ADDITIONAL CHECKS
• Check the following for possible additional causes:
Customer driving habits (such as excessive loads or over RPM limiting functions enabled).
Clutch.
Charging system.
Ignition base timing (if not previously checked).
• If the base timing is not correct, align the engine timing belt (See Engine Timing Belt Removal & Installation in
02 Engine).
Are all checks OK?
Ye s>>See Diagnostic Help for additional information.
No
>>Repair as necessary.
Verify the symptom no longer exists.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03
03–555Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Back Fires
The following conditions apply to this symptom:
•The engine will back fire when operated.
• The engine back fire occurs at all operating parameters.
1.PRELIMINARY CHECKS
• Carry out the following preliminary checks:
Vacuum lines (check for damage and correct routing).
Spark plug wire routing (correct firing order).
Are all checks OK?
Ye s>>Go to the next step.
No
>>Repair as necessary.
Verify the symptom no longer exists.
2.CHECK ECM DTC
• Turn the ignition switch on.
• With the scan tool X-431, select view DTC and stream data in ECM.
Are there any DTCs present?
Ye s>>See the Diagnostic Trouble Code (DTC) List.
Go to the specific diagnostic test to troubleshoot the DTC.
No
>>Go to the next step.
3.CHECK SECONDARY IGNITION SYSTEM
• Perform the following to test the secondary ignition system:
Disconnect the injector fuse.
Remove any of the 4 spark plugs.
Connect the spark plug to spark plug wire.
Ground the spark plug on the cylinder block.
Crank the engine to test the secondary ignition system with the spark plugs removed.
Is a strong blue spark visible at each spark plug while cranking the engine?
Ye s>>Go to the next step.
No
>>Check Camshaft Position (CMP) sensor signal at ECM.
If CMP sensor is OK, check the following:
Crankshaft Position (CKP) sensor malfunction
Spark plug wires
Spark plugs
4.CHECK FUEL QUALITY
• Check fuel quality (concerns such as correct octane, contamination).
Is the fuel quality OK?
Ye s>>Go to the next step.
No
>>Repair as necessary.
Verify the symptom no longer exists.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03–556Chery Automobile Co., Ltd.