2009 CHERY TIGGO check engine

Downloaded from www.Manualslib.com manuals search engine 6.CHECK INJECTOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND
• Turn ignition switch on.
• Check injector supply voltage between sensor ter-
minal 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
• Check the following:
Front fuse and relay box F3, A13, G5
Fuse 12, fuse 24, fuse 27
Without EOBD (1.6L). Front fuse and relay box F3, G2, G5
Fuse 12, Fuse 23, Fuse 24
harness between injector and fuse
Is the check result normal?
Ye s>>With the X-431, check the system, If OK, go to the next step.
No
>>Repair malfunctioning parts.
8.CHECK INJECTOR CONTROL CIRCUITS FOR A SHORT
• Check injector control circuit voltage.
• 3.6 V should exist.
Is the check result normal?
Ye s>>Go to step 10.
No
>>Go to the next step.
DIAGNOSIS & TESTING
LTSMD030024
03
03–161Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 9.DETECT MALFUNCTIONING PART
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between following terminals.
• Continuity should not exist.
INJECTOR NO. INJECTOR
TERMINAL GROUND
12
Ground
22
32
42
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace the circuit for a short in harness or connectors.
10.CHECK INJECTOR RESISTANCE
• Check the fuel injector resistance as shown in the following:
INJECTOR
NO. INJECTOR
TERMINAL RESISTANCE
(APPROXIMATELY) (20°C)
11&2
12
21&2
31&2
41&2
• Check sensor signal output.
• Connect ECM connector.
• Connect injector connectors.
• Check the fuel injector voltage as shown in the following:
TERMINAL NO. ITEMCONDITIONDATA (AVERAGE DC
VOLTAGE)
6 Injector 2
•Engine is running
• Warm-up condition
• Idle
• Accelerate suddenly Voltage: 11 - 14 V
7
Injector 3
27 Injector 1
47 Injector 4
DIAGNOSIS & TESTING
03–162Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 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 P0261, P0264, P0267 or P0270 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03
03–163Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Check reference values between ECM terminals and ground under the following conditions:
TERMINAL NO.ITEMCONDITIONDATA (AVERAGE DC
VOLTAGE)
6 Injector 2
•Engine is running
• Warm-up condition
• Idle
• Accelerate suddenly Voltage: 11 - 14 V
7
Injector 3
27 Injector 1
47 Injector 4
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION POSSIBLE CAUSE
P0262 Cylinder 1 - Injector Circuit
High
Engine is running •
Injector
• Harness or connectors
• ECM
P0265
Cylinder 2 - Injector Circuit
High
P0268 Cylinder 3 - Injector Circuit
High
P0271 Cylinder 4 - Injector Circuit
High
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 :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
Diagnostic Procedure
1.CHECK GROUND CONNECTIONS
• Turn ignition switch off.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-
trols).
• Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine
Room Harness (With 1.6L/1.8L Engine) in Section 16 Wiring).
Are the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground connections.
DIAGNOSIS & TESTING
03–166Chery 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>>Go to step 10.
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
• Disconnect the Injector (1) electrical connector.
• 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
BESM040006
03
03–167Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6.CHECK INJECTOR POWER SUPPLY CIRCUIT FOR SHORTED
• Turn ignition switch on.
• Check injector supply voltage between sensor ter-
minal 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
• Check the following:
Front fuse and relay box F3, A13, G5
Fuse 12, fuse 24, fuse 27
Without EOBD (1.6L) Front fuse and relay box F3, G2, G5
Fuse 12, Fuse 23, Fuse 24
• Check harness for open or shorted between injector and fuse.
Is the check result normal?
Ye s>>With the X-431, check the system, If OK, go to the next step.
No
>>Repair or replace malfunctioning parts.
8.CHECK INJECTOR CONTROL CIRCUITS FOR A SHORT
• Check injector control circuit voltage.
• 3.6 V should exist.
Is the check result normal?
Ye s>>Go to step 10.
No
>>Go to the next step.
DIAGNOSIS & TESTING
LTSMD030024
03–168Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 9.DETECT MALFUNCTIONING PART
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check the injector control circuits for short to power supply circuits.
• Check the following.
• Voltage should not exist.
INJECTOR NO. POWER SUPPLY CIRCUIT INJECTOR TERMINAL
1
Power supply circuit 2
2 2
3 2
4 2
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for an open or short in harness or connectors.
10.CHECK INJECTOR RESISTANCE
• Check resistance as table shown.
• Check the fuel injector resistance as shown in the following:
INJECTOR
NO. INJECTOR
TERMINAL RESISTANCE
(APPROXIMATELY) (20°C)
11&2
16
21&2
31&2
41&2
• Check signal output.
• Connect ECM connector.
• Connect injector connectors.
• Check the fuel injector voltage as shown in the following:
TERMINAL NO. ITEMCONDITIONDATA (AVERAGE DC
VOLTAGE)
6 Injector 2
•Engine is running
• Warm-up condition
• Idle
• Accelerate suddenly Voltage: 11 - 14 V
7
Injector 3
27 Injector 1
47 Injector 4
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace injector.
DIAGNOSIS & TESTING
03
03–169Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 11 .CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• See DTC Confirmation Procedure.
Is DTC P0262, P0265, P0268 or P0271 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03–170Chery Automobile Co., Ltd.