Chery Tiggo 2009 Service Manual page 838

ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
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?
Yes >>
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?
Yes
>>
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?
Yes >>
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?
Yes >>
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?
Yes >>
Go to the next step.
No >>
Repair as necessary.
554
03–
Chery Automobile Co., Ltd.