Chery Tiggo. Manual — part 107
13.
CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to ⬙DTC Confirmation Procedure⬙.
Is DTC P0172 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
P0201 - Cylinder 1 - Injector Circuit
P0202 - Cylinder 2 - Injector Circuit
P0203 - Cylinder 3 - Injector Circuit
P0204 - Cylinder 4 - Injector Circuit
DIAGNOSIS & TESTING
LTSMW030048T
DIAGNOSIS & TESTING
LTSMW030049T
03
Check reference values between ECM terminals and ground under the following conditions:
ECM TERMINAL NO.
ITEM
CONDITION
DATA (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
P0201
Cylinder 1 - Injector Circuit
Engine is running
• Injector
• Harness or connectors
• ECM
P0202
Cylinder 2 - Injector Circuit
P0203
Cylinder 3 - Injector Circuit
P0204
Cylinder 4 - Injector Circuit
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?
Yes
>>
Go to the next step.
No
>>
Repair or replace ground connections.
DIAGNOSIS & TESTING
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