CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine 5.CHECK KNOCK SENSOR
• Check knock sensor.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair as necessary.
Verify the symptom no longer exists.
6.CHECK TIMING
• Check for the timing misalignment.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Align the engine timing belt (See Engine Timing Belt Removal & Installation in Section 02 Engine).
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 FOR BASE ENGINE CONCERNS
• Check for base engine concerns (such as improper cylinder compression, worn camshaft/valve train, gasket
leaks).
Is a fault indicated?
Ye s>>Repair as necessary.
No
>>See Diagnostic Help for additional information.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03
03–557Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Engine Poor Driveability
The following conditions apply to this symptom:
•Engine stalls/quits, engine runs rough, misses, buck/jerk, hesitation/stumble acceleration, surges, rolling idle.
• Engine stops unexpectedly at beginning of acceleration or during acceleration.
• Engine stops unexpectedly while cruising.
• Engine speed fluctuates during acceleration.
• Engine misses during acceleration.
• Vehicle bucks/jerks during acceleration, cruising or deceleration.
• Momentary pause during acceleration.
• Momentary minor loss in engine output.
1.PRELIMINARY CHECKS
NOTE :
Be aware of the over RPM limiting functions of the ECM.
• 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
Are all checks OK?
Ye s>>Go to the next step.
No
>>Repair as necessary.
Verify the symptom no longer exists.
2.CHECK FOR STALL AT IDLE
• Check for engine stall at idle.
NOTE :
Confirm that proper vehicle maintenance has been performed before continuing with engine diagnosis.
• Inspect the following components:
Clean the injectors
Fuel filter
Intake air filter
Throttle body
Spark plugs
Spark plug wires
Does the engine now stall at idle?
Ye s>>Repair as necessary.
No
>>Go to the next step.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03–558Chery 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 10. CHECK EVAPORATIVE EMISSIONS (EVAP) SYSTEM
• Disconnect the canister control valve (1) hose.
• Place a stiff piece of paper over the hose end,
start 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.
11 .CHECK ENGINE CYLINDER COMPRESSION
• Check engine cylinder compression.
• Compression should not be less than 1,000 kPa, and not vary more than 25 percent from cylinder to cylinder.
Is engine compression correct?
Ye s>>Go to the next step.
No
>>Repair as necessary.
12.ADDITIONAL CHECKS
• Check the following for possible additional causes:
Driveline
Transaxle
Charging system
A/C system (for surge with A/C on)
Are the checks OK?
Ye s>>See Diagnostic Help for additional information.
No
>>Repair as necessary.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
VISMD030007
03
03–561Chery 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 5.CHECK CLUTCH OPERATION CONDITION
• Check clutch operation condition.
Is the transaxle clutch operation normal?
Ye s>>Go to the next step.
No
>>Repair as necessary.
6.CHECK A/C SYSTEM OPERATION
• Start engine.
• Cycle A/C switch from on to off (verify A/C clutch engages condition).
• Check the A/C system operation.
Does the A/C system operate normally?
Ye s>>Go to the next step.
No
>>Repair as necessary.
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 FOR 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
>>See Diagnostic Help for additional information.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03
03–563Chery 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.