2009 CHERY TIGGO check engine

Downloaded from www.Manualslib.com manuals search engine Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL NO.ITEMCONDITIONDATA (DC VOLTAGE)
10 Ignition coil 1
Engine: 3000 RPM 0.3 - 3.0 V
23 Ignition coil 2 0.3 - 3.0 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
44 Ignition signal •
Engine speed: 50
- 4000 RPM
• Except decelerate
and accelerate
suddenly or
decelerate suddenly The misfire times of
No.1 and No.4 or
No.2 and No.3 is
more than the reset
misfire times of per
1000 RPM.•
Ignition coil
• Ignition primary
harness or
connectors
• Spark plug and
tension cable
• Cylinder pressure
• ECM
DTC Confirmation Procedure:
Before performing the following procedure, confirm that battery voltage is more than 12 V.
• Turn ignition switch off.
• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available.
• Turn ignition switch on.
• With the scan tool, record and erase stored DTCs in the ECM.
• Start engine and warm it to normal operating temperature then select view DTC.
• If DTC is detected, go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnosis & Testing Diagnostic Help in Sec-
tion 03 Electronic Engine Controls).
NOTE :
Before performing the following procedure, make sure that the ECM ground connection is in good condition.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
Diagnostic Procedure
1.CHECK GROUND CONNECTION
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect the ground connections E-207 and E-208 (See Vehicle Wiring Harness Layout - Engine Room Harness
(With Mitsubishi 2.4L Engine) in Section 16 Wiring).
Is the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground connection.
DIAGNOSIS & TESTING
03–526Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.CHECK ENGINE START
• Start the engine.
Is any cylinder ignited?
Ye s>>If with the X-431, go to the next step.
If without the X-431, go to step 3.
No
>>Go to step 4.
3.PERFORM ACTIVE TEST FUNCTION
• Select ACTIVE TEST menu.
• Perform ignition active test (If the X-431 has the function).
• Make sure that each test produces a momentary engine speed drop.
Is the check result normal?
Ye s>>Inspection end.
No
>>Go to step 4.
4.CHECK FUNCTION OF IGNITION
• Let engine run at 3000 RPM.
• Read voltage signal between ECM terminals 10, 23 and ground.
IGNITION
COIL
TERMINAL NO. ITEM CONDITION
DATA (DC
VOLTAGE)
10 Ignition coil
1 terminal 3 Engine:
3000 RPM 0.3 - 3.0 V
23 Ignition coil
2 terminal 3 0.3 - 3.0 V
• If with check tool-timing mark lamp, check the actual ignition time.
CHECK ITEM CONTENTNORMAL VALUE
Ignition coil with power transistor •
Engine: Warm-up
condition
• Timing lamp (For check
the actual ignition time) Engine: Idle
2 - 18° BTDC
Engine: 2500 RPM 18 - 38° BTDC
Is the check result normal?
Ye s>>Go to step 10.
No
>>Go to the next step.
DIAGNOSIS & TESTING
03
03–527Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.CHECK IGNITION COIL ELECTRICAL CONNECTOR
• Turn ignition switch off.
• Disconnect the ignition coil electrical connector (1).
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Ye s>>Go to the next step.
No
>>Repair or replace the electrical connector
as necessary.
6.CHECK IGNITION COIL POWER SUPPLY CIRCUIT FOR AN OPEN OR SHORT
• Turn ignition switch on.
• Check supply voltage between ignition coil terminal
1 and ground in the ignition coil electrical connec-
tor.
• Battery voltage should exist.
Is the check result normal?
Ye s>>Go to step 8.
No
>>Go to the next step.
7.DETECT MALFUNCTIONING PART
• Check the following:
Fuse 15
Front fuse and relay box B8
Harness connectors A-102, E-105
Harness open or short between ignition coil and fuse
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace malfunctioning parts.
DIAGNOSIS & TESTING
LTSM030017
LTSMD030022
03–528Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 8.CHECK IGNITION COIL GROUND CIRCUIT FOR AN OPEN
• Turn ignition switch off.
• Check harness continuity between ignition coil terminal 2 and ground.
• Continuity should exist.
Is the check result normal?
Ye s>>Go to step 10.
No
>>Go to the next step.
9.DETECT MALFUNCTIONING PART
• Check harness for an open or short between ignition coil and ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for an open or short in harness or connectors.
10.CHECK IGNITION COIL INPUT SIGNAL CIRCUIT FOR AN OPEN OR SHORT
• Disconnect ECM connector.
• Check harness continuity between ECM terminal 10, 23 and ignition coil E-069, E-070, terminal 3.
• Continuity should exist.
• Check harness for short to power and short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair harness in harness or connectors.
11 .CHECK IGNITION COIL
• Check power transistor conducting state.
• Use simulation resistance meter.
• Connect the positive lead of the simulation resistance meter to the terminal of the power transistor.
CAUTION:
This test should be completed quickly (in 10 seconds), to prevent ignition coil from burning and
power transistor from damaging.
•Also check resistance between ignition coil terminals as table shown.
• Also check ignition coil signal output.
DIAGNOSIS & TESTING
03
03–529Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine TERMINAL NO. RESISTANCE(25°C)
1 & 2 Except 0 or
1&3 Except 0
2&3
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace the ignition coil.
12.CHECK HIGH TENSION CABLE RESISTANCE
• Check if there is crack exist.
• Check if the limited resistance value is 22 k.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace high tension cable.
13.CHECK SPARK PLUG
• Remove spark plug high tension cable.
• Remove spark plug.
• Check if there is burned electrode or damaged nonconductor. And check if the burned mark is even.
• Check if there is carbon deposit exist. Use steel wire or tool to eliminate it.
• Check if the clearance meet standard. The standard is: 1.1 mm.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace or eliminate or adjust the spark plug.
14.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC 44 still present?
Ye s>>Replace the ECM.
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03–530Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.4L ENGINE SYMPTOM DIAGNOSIS
Symptom Diagnostic Tests03-544
General Troubleshooting Checks 03-544
Visual Inspection 03-544
Diagnostic Help 03-544
Symptom Diagnostic Test List 03-544
Engine Cranks Normal But Will Not
Start 03-545
Engine Will Not Crank 03-547Hard Start / Long Crank / Erratic Start /
Erratic Crank
03-549
Fast Idle 03-552
Lack / Loss Of Power 03-553
Back Fires 03-556
Engine Poor Driveability 03-558
Low Idle / Stalls During Deceleration 03-562
Idle Speed Slow Return To Normal Idle 03-564
03
03–543Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Symptom Diagnostic Tests
General Troubleshooting Checks
•Confirm the engine trouble light is working properly.
• Confirm that there are no DTCs recorded with the X-431 Scan Tool.
• Confirm that the customer’s complaint is current, and the conditions that are causing the failure are present.
Visual Inspection
•Check the fuel system for any fuel leakage.
• Check the vacuum system for any broken, kinked or incorrectly linked vacuum pipes or hoses.
• Check the intake air pipe for being jammed, leaking, or damaged.
• Check the ignition system for any broken or aging spark plug wires and verify the engine firing order is correct.
• Check the engine ground cable and verify a clean and tight connection.
• Check the sensors and actuators electrical connectors and verify good contact and tight connection.
NOTE :
Repair any of the above conditions first before continuing with symptom diagnostics.
Diagnostic Help
• Confirm there are no current engine DTCs.
• Confirm that the failure exists and the customer complaint can be verified.
• Inspect the engine following the above steps and verify all engine features are operating properly.
• While servicing the vehicle, verify the service record, vehicle maintenance, engine compression pressures,
mechanical ignition timing and fuel conditions.
• If replacing the Engine Control Module (ECM), carry out the validation test. If the failure no longer exists, the
failure is in the ECM; if the failure still exists, reinstall the original ECM and repeat the diagnostic test.
Symptom Diagnostic Test List
SYMPTOM DEFINITION
Engine Cranks Normal But Will Not Start
Engine Will Not Crank
Hard Start / Long Crank Time
Fast Idle
Lack / Loss Of Power
Back Fires
Engine Poor Driveability
Low Idle / Stalls During Deceleration
Idle Speed Slow Return To Normal Idle
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03–544Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Engine Cranks Normal But Will Not Start
The following conditions apply to this symptom:
•The engine cranks at normal speed.
• The engine will not start.
• The battery is fully charged.
1.PRELIMINARY CHECKS
CAUTION:
Extended cranking because of a No Start can load the exhaust system with raw fuel, damaging the
catalytic converter after the engine starts.
•Carry out the following preliminary checks:
Fuel quality
Electrical connections
Intake air tube integrity
Fuses and relays
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair as necessary.
Verify the symptom no longer exists.
2.CHECK DTC
• Turn the ignition switch on.
• With the scan tool X-431, select view DTC.
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.TRY TO START THE ENGINE WITH THE THROTTLE CLOSED
• Attempt to start the engine.
Does the engine start now with the throttle closed?
Ye s>>Verify the symptom no longer exists.
No
>>Go to the next step.
4.CHECK EXHAUST SYSTEM
• Inspect the vehicles exhaust system for restriction.
Is there a restriction in the exhaust system?
Ye s>>Repair as necessary.
No
>>Go to the next step.
ELECTRONIC ENGINE CONTROLS - 2.4L ENGINE SYMPTOM DIAGNOSIS
03
03–545Chery Automobile Co., Ltd.