2009 CHERY TIGGO engine

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK DTC
• Perform DTC confirmation procedure.
Is DTC P0604, P0605 or P0606 present?
Ye s>>Go to the next step.
No
>>The DTC condition is intermittent (See Diagnostic Help in Section 03 Electronic Engine Controls).
2.CHECK ECM POWER SUPPLY AND GROUND
• Check if the ECM supply voltage circuit, ground circuit open, high resistance or short circuits existing.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace circuit for open or short in harness and connectors.
3.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is the check result normal?
Ye s>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
No
>>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).
DIAGNOSIS & TESTING
03
03–397Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine P0602 - ECM Programming Error
On Board Diagnostic Logic
•Self-diagnosis detection logic.
DTC NO. DTC DEFINITION POSSIBLE CAUSE
P0602 ECM programming error 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 the engine and warm it to normal operating temperature.
• With the scan tool, select view DTC and data stream.
• If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-
bleshooting in Section 03 Electronic Engine Controls for more information.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
03–398Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK DTC
• Perform DTC confirmation procedure.
Is DTC P0602 present?
Ye s>>Go to the next step.
No
>>The DTC condition is intermittent (See Diagnostic Help in Section 03 Electronic Engine Controls).
2.CHECK THE ECM POWER SUPPLY AND GROUND
• Check if the ECM supply voltage circuit, ground circuit open, high resistance or short circuits existing.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace circuit for an open or short in harness and connectors.
3.MATCH ECM
With the scan tool X-431, match ECM before replace it (See ECM Removal & Installation in Section 03 Electronic
Engine Controls), and view the DTC with the X-431.
Is DTC P0602 setting again?
Ye s>>Go to the next step.
Refer to Technical Bulletin that issued.
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
4.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• See DTC Confirmation Procedure.
Is DTC P0602 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
03–399Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine P0645 - A/C Clutch Relay Circuit
DIAGNOSIS & TESTING
LTSMW030063T
03–400Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
LTSMW030064T
03
03–401Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINALNO. ITEM
CONDITION DATA (AVERAGE
DC VOLTAGE)
69 Air Condition (A/C)
relay control signal •
After engine is started for 5 seconds, A/C
can be turned on.
• If IAT above 140.3 , A/C will be shut off.
• If ECT is above 140.3°C, A/C will be shut
off. If ECT is below 111.8°C, A/C will be
resume.
• If A/C high pressure is above 20 bar, A/C
will be shut off. If A/C high pressure is
below 19.5 bar, A/C will be resume.
• If evaporator temperature is below 1.5°C,
A/C will be shut off. If evaporator
temperature is above 4.5°C, A/C will be
resume.
• If system voltage is below 8.04 V, A/C will
be shut off. If system voltage is above
10.01 V, A/C will be resume. 0 V or 12 V
On Board Diagnostic Logic
• Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
P0645 A/C clutch relay
circuit Engine is running ECM detected that
the input signal is out of the
acceptable range. •
Fuse
• A/C relay
• 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.
• Turn A/C switch on, then select view DTC and data stream.
• If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-
bleshooting in Section 03 Electronic Engine Controls for more information.
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
03–402Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 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 2.0L Engine) in Section 16 Wiring).
Are the ground connections OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground harness or connections.
2.CHECK AIR CONDITION CLUTCH RELAY CONTROL CIRCUIT POWER SUPPLY CIRCUIT FOR OPEN
• Turn ignition switch on.
• Turn A/C switch off.
• Check A/C clutch relay control circuit supply voltage
between ECM terminal 69 and ground in the ECM
electrical connector E-001.
• 12 V should exist.
Is the check result normal?
Ye s>>Go to step 4.
No
>>Go to the next step.
3.DETECT MALFUNCTIONING PART
• Check the following:
Fuse 12
A/C relay
Body fuse and relay box G5
Harness connectors C-103, E-103, B-104, C-104
Harness for open between ECM terminal 69 and fuse 12
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace malfunctioning part.
DIAGNOSIS & TESTING
LTSMD030065
03
03–403Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0645 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
03–404Chery Automobile Co., Ltd.