CHERY TIGGO 2009 Service Repair Manual

Downloaded from www.Manualslib.com manuals search engine 2.CHECK KNOCK SENSOR ELECTRICAL CONNECTOR
• Disconnect the knock sensor electrical connector
E-066 (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.
3.CHECK THE KNOCK SENSOR GROUND CIRCUIT
• Check continuity between knock sensor terminal 1 and ground.
• Continuity should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the knock sensor ground circuit.
4.CHECK KNOCK SENSOR SIGNAL CIRCUIT
• Disconnect ECM harness connector.
• Check harness continuity between sensor connector E-066, terminal 1 and ground, sensor terminal 2 and ECM
terminal 62.
CHECK SENSOR CIRCUIT
ECM TERMINAL KNOCK SENSOR TERMINAL
62 2
• Also check harness for short to power and short to ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for an open or short in harness or connectors.
DIAGNOSIS & TESTING
LTSM030011
03
03–517Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.CHECK KNOCK SENSOR SIGNAL
• Connect knock sensor (1) connector.
• Set multimeter to voltage range.
• Check knock sensor (1) output signal as table
shown.
CHECK OUTPUT SIGNAL
KNOCK SENSOR TERMINAL NO. TEST METHODDATA (AVERAGE DC VOLTAGE)
1&2 •
Test Method 1: Knock at cylinder
with rubber hammer. Output signal voltage should exist.
• Test Method 2: Knock at sensor
slightly.
• Output signal voltage should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace knock sensor.
6.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC 31 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
LTSM030011
03–518Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 41 - Injector
DIAGNOSIS & TESTING
LTSMW030008T
03
03–519Chery Automobile Co., Ltd.

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)
1 Injector 1
•Engine is running
• Warm-up condition
• Accelerate suddenly Voltage: 11 - 14 V
2
Injector 3
14 Injector 2
15 Injector 4
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION POSSIBLE CAUSE
41 InjectorEngine is running •
Injector
• Harness or connectors
• 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 connection E-208 (See Vehicle Wiring Harness Layout - Engine Room Harness (With Mit-
subishi 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
03–520Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.INSPECTION START
• Start 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 4.
No
>>Go to step 5.
3.PERFORM ACTIVE TEST FUNCTION
• Select ACTIVE TEST menu.
• Perform injector active test.
• Make sure that each test produces a momentary engine speed drop.
Is the check result normal?
Ye s>>The system is OK.
No
>>Go to step 5.
4.CHECK FUNCTION OF INJECTOR
• Listen to injector operating sound one by one.
Do all injectors clicking noise exist?
Ye s>>Go to step 10.
No
>>Go to the next step.
5.CHECK INJECTOR ELECTRICAL CONNECTOR
• Turn ignition switch off.
• Disconnect the injector 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.
DIAGNOSIS & TESTING
LTSM020173
03
03–521Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6.CHECK INJECTOR POWER SUPPLY CIRCUIT FOR OPEN OR SHORT
• Turn ignition switch on.
• Check injector supply voltage between sensor ter-
minal 1 and ground in the electrical connector.
• 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
• Disconnect injector harness connector.
• Check the following:
Harness connectors A-102, E-105
Front fuse and relay box H3
Fuse 22, Fuse 12
Harness for open or short between injector and fuse
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace malfunctioning part.
8.CHECK INJECTOR CONTROL CIRCUITS FOR AN OPEN AND SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between following terminals.
INJECTOR
NO. ECM
TERMINAL INJECTOR
TERMINAL
112
21 42
322
41 52
DIAGNOSIS & TESTING
LTSMD030019
03–522Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine •Continuity should exist.
• Also check harness for short to power or short to ground.
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 injector control circuit and ground.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair harness or connectors.
10. CHECK INJECTOR
• Check resistance as table shown.
INJECTOR NO. INJECTOR TERMINALRESISTANCE (APPROXIMATELY)
(20°C)
1 1&2
13-16
2
1&2
3 1&2
4 1&2
• Also check signal output.
• Connect ECM connector.
• Connect injector connector.
TERMINAL NO. ITEMCONDITIONDATA (DC VOLTAGE)
1 Injector 1
•Engine is running
• Warm-up condition
• Accelerate suddenly Voltage: 11 - 14 V
2
Injector 3
14 Injector 2
15 Injector 4
DIAGNOSIS & TESTING
03
03–523Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine •With the X-431, select data stream:
Injector (condition 1) - Idle switch is close while TPS signal output is high 50 - 100 mV than signal output
in idle position.
Injector (condition 2) - This inject control time under two condition: crank speed below 250 RPM, power supply is 11 voltage.
CHECK ITEM CHECK CONTENT NORMAL VALUE: MS
Injector (condition 1) •
Engine condition:
Running ECT: 0°C
13 - 20
ECT: 20°C 27 - 41
ECT: 80°C 6.8 - 10.2
Injector (condition 2) •
ECT: 80 - 95°C
• Lamp and all
accessories: OFF
• Transaxle: Neutral Engine condition: Idle
1.9 - 3.1
2500 RPM 1.7 - 2.9
Engine high running idle suddenly Raise
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace injector.
11 .CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC 41 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
03–524Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 44 - Ignition Signal
DIAGNOSIS & TESTING
LTSMW030007T
03
03–525Chery Automobile Co., Ltd.

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.