2009 CHERY TIGGO check engine

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK INTAKE AIR LEAK
• Start engine and let it idle.
• Listen for an intake air leak after the mass air flow sensor.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Discover air leak location and repair.
2.CHECK THE ELECTRIC THROTTLE CONTROL ACTUATOR
• Check the electronic throttle open degree.
• Check the electronic throttle clearance.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Clean or replace as necessary.
3.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0506 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
03–192Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine P0601 - Internal Control Module Memory Check Sum Error
P0604 - Internal Controller Module Random Access Memory (RAM) Error
P0605 - Internal Controller Module ROM Test Error
P0606 - ECM Processor
•Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION POSSIBLE CAUSE
P0601 Internal control module
memory check sum error
ECM detected an internalfailure. •
ECM
P0604 Internal control module
Random Access Memory (RAM) error
P0605 Internal control module
ROM test error
P0606 ECM processor
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.
• Run engine for a while 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.
DIAGNOSIS & TESTING
03
03–193Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK DTC
• Perform DTC confirmation procedure.
Is DTC P0601, 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 circuit for an open or short in harness or connectors.
3.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0601, P0604, P0605 or P0606 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
03–194Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine P0602 - ECM Programming Error
•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.
• Run engine for a while 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 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 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 circuit for open or short in harness and connectors.
3.MATCH ECM
• With the scan tool X-431, match the ECM before replacing it (See ECM Removal & Installation in Section 03
Electronic Engine Controls), and view the DTC with the X-431.
Is DTC P0602 still present?
Ye s>>Go to the next step.
No
>>The DTC was caused by a programming error.
DIAGNOSIS & TESTING
03
03–195Chery 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 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
03–196Chery 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 (AVERAGE DC
VOLTAGE)
69 Air compressor relay •
After engine has been
started for 5 seconds, A/C
can be turned on.
• If IAT is above 140.3°C ,
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 resume.
• If A/C high side
pressure is above 20.0
bar, A/C will be shut off. If
A/C high side pressure is
below 19.5 bar, A/C will
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
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
resume. 0Vor12V
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 compressor
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 up to the normal operating temperature.
• Turn A/C switch on 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.
DIAGNOSIS & TESTING
03
03–199Chery 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 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.
2.CHECK A/C CLUTCH RELAY CONTROL CIRCUIT
• Turn off A/C switch.
• Check A/C clutch relay control circuit supply voltage
between ECM terminal 69 and ground in the ECM
electrical connector E-001.
• Battery voltage 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 FB18, SB2
Front fuse and relay box K, E, J
A/C compressor relay, EMS relay (R2)
Check harness for an open or short 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
03–200Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 4.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• See 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
03–201Chery Automobile Co., Ltd.