Chery Tiggo. Manual — part 171
Diagnostic Procedure
1.
CHECK DTC
• Perform DTC confirmation procedure.
Is DTC P0604, P0605 or P0606 present?
Yes
>>
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?
Yes
>>
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?
Yes
>>
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
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
Diagnostic Procedure
1.
CHECK DTC
• Perform DTC confirmation procedure.
Is DTC P0602 present?
Yes
>>
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?
Yes
>>
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?
Yes
>>
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?
Yes
>>
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
P0645 - A/C Clutch Relay Circuit
DIAGNOSIS & TESTING
LTSMW030063T
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