ignition CHERY TIGGO 2009 Service Repair Manual

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.

Downloaded from www.Manualslib.com manuals search engine 3.CHECK FOR ROUGH IDLE
• Check for engine rough idle.
NOTE :
Confirm that proper vehicle maintenance has been performed before continuing with engine diagnosis.
• Inspect the following components:
Clean the carbon deposit on intake and exhaust valves
Valve stem
Spark plugs
Throttle body
Spark plugs and combustion chamber
Does the engine idle rough?
Ye s>>Repair as necessary.
No
>>Go to the next step.
4.CHECK ECM DTC
• Turn the ignition switch on.
• With the scan tool X-431, read the DTC.
Are there any DTCs present?
Ye s>>Repair as necessary.
No
>>Go to the next step.
5.CHECK THE ELECTRONIC THROTTLE CONTROL (ETC) ACTUATOR
• Start engine and let idle.
• While checking for RPM drop or engine stall, disconnect ETC actuator connector.
Did RPM drop or engine stall when the ETC connector was disconnected?
Ye s>>Connect ETC actuator connector.
Go to the next step.
No
>>Repair as necessary.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03
03–559Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6.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
7.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.
8.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.
9.CHECK PCV SYSTEM
• Check the Positive Crankcase Ventilation (PCV) system.
• Remove PCV valve and shake it.
Is PCV valve normal?
Ye s>>Go to the next step.
No
>>Replace the PCV valve.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03–560Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Low Idle / Stalls During Deceleration
The following conditions apply to this symptom:
•Engine stops unexpectedly at beginning of deceleration or recovery from deceleration.
1.PRELIMINARY CHECKS
• Carry out the following preliminary checks:
Vacuum lines (routing, leaks)
Intake air tubes
Wiring connections
Are all checks OK?
Ye s>>Go to the next step.
No
>>Repair as necessary.
Verify the symptom no longer exists.
2.CHECK FOR ROUGH OR STALL AT IDLE
• Check for rough idle or stall at idle.
NOTE :
Confirm that proper vehicle maintenance has been performed before continuing with engine diagnosis.
• Inspect the following components:
Clean the carbon deposit on intake and exhaust valves
Valve stem
Spark plugs and combustion chamber
Does the engine idle rough?
Ye s>>Repair as necessary.
No
>>Go to the next step.
3.CHECK ECM DTC
• Turn the ignition switch on.
• With the scan tool X-431, read the DTC.
Are there any DTCs present?
Ye s>>Repair as necessary.
No
>>Go to the next step.
4.CHECK THE ELECTRONIC THROTTLE CONTROL (ETC) ACTUATOR
• Start engine and let idle.
• Disconnect ETC actuator connector and check for RPM drop or engine stall.
Did RPM drop or engine stall when the ETC connector was disconnected?
Ye s>>Connect ETC actuator connector.
Go to the next step.
No
>>Repair as necessary.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03–562Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Idle Speed Slow Return To Normal Idle
The following conditions apply to this symptom:
•Slow return to idle.
1.PRELIMINARY CHECKS
• Carry out the following preliminary checks:
Vacuum leaks
Intake air system
Throttle body
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, read the DTC.
Are there any DTCs present?
Ye s>>Repair as necessary.
No
>>Go to the next step.
3.CHECK PCV VALVE
• Remove Positive Crankcase Ventilation (PCV) valve and shake it.
Does PCV valve rattle?
Ye s>>Install PCV valve, go to the next step.
No
>>Replace the PCV valve.
4.CHECK PCV SYSTEM
• Start engine and bring to normal operating temperature. Disconnect crankcase ventilation hose from PCV valve.
Place a stiff piece of paper over the hose. Wait 1 minute.
Does vacuum hold paper in place?
Ye s>>Verify test results. If OK, see diagnostic index to repair any additional symptom.
No
>>Check for vacuum leaks, obstructions in the PCV system, oil cap, PCV valve, rocker cover bolt
torque/gasket leak. Repair as necessary.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03–564Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine IGNITION CONTROL
GENERAL INFORMATION03-566
Description 03-566
Operation 03-566
Specifications 03-566
Special Tools 03-567
Electrical Schematics 03-568
ON-VEHICLE SERVICE03-571
Ignition Coil 1.6L & 1.8L & 2.0L 03-571
Description 03-571
Operation 03-571
Removal & Installation 03-571Ignition Coil 2.4L
03-572
Description 03-572
Operation 03-572
Removal & Installation 03-572
Spark Plug Wire 1.6L & 1.8L & 2.0L 03-573
Removal & Installation 03-573
Spark Plug Wire 2.4L 03-574
Removal & Installation 03-574
Spark Plug 1.6L & 1.8L & 2.0L 03-574
Removal & Installation 03-574
Spark Plug 2.4L 03-575
Removal & Installation 03-575
03
03–565Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine GENERAL INFORMATION
Description
The electronic ignition system consists of the following components:
•Engine Control Module (ECM)
• Ignition Coil
• Spark Plugs
• Spark Plug Wires
• Camshaft Position (CMP) Sensor
• Crankshaft Position (CKP) Sensor
Operation
The ignition system utilizes a split ignition coil which supplies secondary voltage to two cylinders. When the ignition
coil discharges, two spark plugs fire at the same time. The Engine Control Module (ECM) uses inputs from the
Crankshaft Position (CKP) Sensor to determine the Top Dead Center (TDC) position of the piston for cylinder number
one, and the Camshaft Position (CMP) Sensor to determine which ignition coil to energize.
Specifications
Torque Specifications
DESCRIPTION TORQUE (N·m)
Spark Plugs 30
Ignition Coil Bolts 6
Spark Plug Specifications
DESCRIPTIONGAP
FR7DTC 0.7 mm - 1.1 mm
03–566Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Electrical Schematics
Ignition Control System - 1.6L / 1.8L (Page 1 of 1)
GENERAL INFORMATION
LTSMW030057T
03–568Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Ignition Control System - 2.0L (Page 1 of 1)
GENERAL INFORMATION
LTSMW030037T
03
03–569Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Ignition Control System - 2.4L (Page 1 of 1)
GENERAL INFORMATION
LTSMW030007T
03–570Chery Automobile Co., Ltd.